Turbo Jeep Smashes World Records! (Tons of Innovation!)

Newcomer Racing smashes world records with the most powerful Jeep 4.0 engine ever built. This is a 4.0 block built as a stroker and filled with hard block. The block, crankshaft, cylinder head and oil pan are all OEM components. Newcomer used an On 3 turbo to provide the boost and almost everything else is custom.
For reference you might want to check out these previous builds with Newcomer Racing:
Custom EFI 4.0 Stroker Build -- • We Put All the Tricks ...
Budget Stroker Build -- • Big Power Jeep Straigh...
Engine Builder: Newcomer Racing (www.newcomerrac...)
Engine Tuning: Automotive Specialists (automotivespec...)
Snow Performance Water/Meth Injection: amzn.to/36IhRWh
Holley Dominator ECU: amzn.to/2RtlPJn
Holley HP ECU: amzn.to/3kfIpld
Holley Smart Coils: amzn.to/33sNK1N
Winged 1/2-Inch Washer Set: bit.ly/33uj8gd
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[@Potatofarmer1898]

People have only been talking about the power potential of the Jeep 4.0 for over 20 years. He proved it can be done even with a paltry aftermarket compared to LSland and with a crap ton of fabrication. My hat is off to him. He sells a turnkey stroker engine with 300hp for $6K.... so... If throwing 20lbs boost + methanol at it didn’t grenade it, the NA version will be solid. I will look him up to get an engine for the swap on my WJ. Way to go!!!!

[@xmo552]

WJ's unite

[@nate4036]

2 WJs and LJ🙋🏻‍♂️

[@jacobyoung4657]

When I wanna do a rebuild I'm doing a full swap for a stoker 4.0. 00 WJ with 195k, and a KJ with 246k

[@jacobyoung4657]

@Michael l I live in Texas my Jeep don't go over 210f, 200f is the normal running temp for the 4.0 he must of had a cooling problem of some sort. Mine normally stays around 195

[@nate4036]

Michael l there’s a few years of 4.0 that had weak head castings. They likely had cracked head not head gaskets

[@ronniejohnson317]

My uncle was one of the designers of the 4.0, when it was still AMC. He said they put one on a dyno , and ran it non stop for two years. They simulated daily driving, snow, rain, mud and towing. It ran a 55 gallon oil drum and a 55 gallon coolant drum.

[@MrCarnutbill67]

I believe this. I've seen them in industrial applications where they've run for years on end outside! What a great little engine.

[@bryanrussell6679]

That's a really interesting story! That's a hell of an endurance test alright. Thanks for sharing.

[@bigsparky8888]

OUTSTANDING...I HAVE ALWAYS LIKED THE 258...Glad to hear your Uncle was one developing this great engine...

[@bigsparky8888]

@@MrCarnutbill67 FORDS BIG 6...2.9L IT WAS LIKE THE BEST USED 6 BANGER FOR INDUSTRIAL APPS...MANY NEVER REV PAST 3,000 RPM AND LIVE FOREVER...

[@andrewsmart2949]

@@bigsparky8888 300 cubic inch is close to 5.0L,the 2.9L your talking about is the 4cyl forklift version

[@kz6fittycent]

I kept watching and hearing those RPM's climb - right along with the power. Then, I just kept saying to myself "This is a JEEP engine!" Put a big smile on my face. Great job Newcomer - amazing outcome!

[@Levibetz]

I mean, technically it was a car engine first. But yeah, at least the head was designed for jeep.

[@mpetersen6]

@@Levibetz The sad thing AMC could have done all of this to the 232 or 258 in terms of fuel injection in the late 70s. The US auto industry was very late to the party in terms of fuel injection aside from a few fuelie Vettes.

[@Levibetz]

@@mpetersen6 check out the Spirit AMX turbo concept they built as a pace car! It had bosch fuel injection on a 258 with a turbo that made around 400hp. Also, what became Bosch's d-jetronic was actually based on Bendix's efi developed in the 1950s and used in chryslers and I thiiink some nash models? Super rare, and a failure in it's day until bosch perfected it and it saw wide use on VWs, saabs, and others.

[@mpetersen6]

@@Levibetz I'm familiar with the Spirit pace car that was put together for IMSA events. At least I think it was IMSA. The only thing that will always hold the 4.0 or any other US built inline 6 as far as power output goes is the cylinder heads. Ford, Chevy, Chrysler and AMC all went with non cross flow heads. These engines were built as utilitarian power units. Entry level motors. If you wanted more power you got a V-8. And to be truthful most if not a lot of them of the V-8s were the US auto industry built back in hay day of the muscle car didnt put out that much power. Even the legends from that time are dogs compared to a lot of engines today in terms of hp per cubic inch. Even Pontiac's OHC six used a non-crossflow head. In fact the Vega 4 cylinder head looks a lot like the Pontiac. One reason that the manufacturers used a non-crossflow head was the intake manifold would be in the way of the distributor. Today with modern ignition systems that's not an issue. Remember these were the days when you were looking at a tune up at least once a year. The reason the intake and distributor would interfere is the dizzy is driven by a helical gear on the camshaft. On an inline you usually drive the dizzy from the center of the cam or between #1 and #2 cylinder. Plus the same gear drives the oil pump by a tang on the dizzy shaft that fits into a slot in the input shaft of the oil pump. One way to convert an inline six to OHC is to use the existing camshaft for your reduction and drive the SOHC or DOHCs from there. And it wasn't just the US manufactures that built inline sixes this way. Look at some of the European and Japanese inline sixes. Both OHV and OHC. The only OHV inline 4 or 6 cylinder engines I can think of that did have a crossflow head were the two built by Pontiac. The Trophy 4 and the Iron Puke. There might be others, and probably are, so there is no reason that others could not have.

[@deborahchesser7375]

@@mpetersen6 I would have loved to have seen a 258 or bigger straight 6 fuel injected AMC in a small 5 spd performance car and some Jeeps.

[@nyplantingsgardendesigners5645]

That HP dip is what typical home garage builders run up against then never figure out why that motor just doesn't feel right. Great tuning example here.

[@andrewsmart2949]

plenty of home builder do overcome development problems such as these

[@davelowets]

That dip is always a valve train instability issue. Usually correctable by using different springs. This is the reason I have EVERY one of my engine builds dynoed.

[@scubbarookie]

I'm a huge fan of the 4.0 L straight 6! I've never seen anyone express their knowledge for extracting these powerband numbers before! You guys are crazy!

[@karlsracing8422]

More non Ls builds i love it!

[@JustALad]

Underrated comment

[@myxtraparts4saledon502]

Lame Shit compared to this!!!

[@jonalarcon8564]

Ls engines are ugly!

[@Enigmah88]

The reason people go with LS is because there's plenty of parts and they're cheap. This motor was probably very expensive to build and you heard the guy, lots of parts are special made. Cool, but not practical. I'd rather pull a junkyard 5.3 for 500$ and boost it and make more power than this easily.

[@youngsjoshua]

Non LS build but at what cost?

[@stevest1300]

At 8.6:1 compression and the strength of the internals, I'd be happy at less than 20 pounds of boost and less than 650 hp. Lots of power that will last forever.

[@kidgokuxl]

I've had too many jeep people tell me that 190hp on a 4.0 is its max. Of course most of them are not owners of a 4.0 i6 engine.....

[@geoffmetituk3604]

Naw there are so many options to build one. My plans for mine is the poor man's 4.6 stroker. 4.2 crank, rockers, cam, pistons, and some other things. But it should make 200crank HP easy. They say if everything is solid it should make 242hp

[@RandomUpstart]

@@geoffmetituk3604 meanwhile i get a tune and go from 200hp to 276hp. Gotta love turbos

[@benjaminsmith7228]

Full bolt ons with edelbrock head and comp cam. Thatll get you somewhere

[@facemelter2135]

I turbo'd my Xj, best thing I ever did.

[@ivanfromtheeast4709]

@@geoffmetituk3604 you’re gonna make way more than 200. My 05 with just an intake, exhaust and plugs makes like 200 you’ll at least be at 225 or 230

[@machinesandthings9641]

That inline 6 has been my favorite since I was a kid. My dad had one from the time I was born till I was 17. Had 280k miles and still ran like new without leaks. Not to mention the excellent torque

[@jgraham8248]

I've got a custom turbo on a Datsun L28 which is also a reverse flow head. You have done a remarkable job of custom making components to overcome the limitations of this Jeep engine. And these videos are some of the best produced I've seen. Pure, direct, factual and educational.....all without a bunch of distracting screaming music....amazing! Thanks!

[@revolutionday1]

As a WJ owner, this is making me......excited.

[@OgamiItto70]

Hentai!

[@kb9oak749]

My dad worked at the Engine plant where these were built. He was a Tin Smith in maintenance, but he would talk to the guys in the dyne room on occasion. The 190hp stock number was where they had to dial it in to avoid damage to trans and driveline components. As you can see it's a beast.

[@njinthemj52]

For it's time, the 4.0 made incredible power. Almost 200 hp when most v8s only made about 250. My auto 4.0 ho. was faster to 60 mph than a NA 5 speed Stealth. It was dead even with a mk3 NA supra to 80 mph.

[@nickthompson9697]

What was the best true number before detuning?

[@mpetersen6]

@@nickthompson9697 The talk at the time was 1 hp per CID. It's to bad they never designed cross flow head for it.

[@nickthompson9697]

Cross flow head would have kept it relevant for another half century.

[@mpetersen6]

@@nickthompson9697 Theres three ways to get one. Cut and weld a set of SBC or SBF heads. Design, make cating patterns, cast and machine a special. Or design and 3D print an aluminum head that needs a lot less machining. The V-8 heads are probably the cheapest but you also have the problems of coolant passages and thermostat mounting

[@OgamiItto70]

Supercool. What I dug the most was the flatness of the torque curve on the NA pull. Harmonic damper or beehive valvesprings (or both), whatever it was, it worked.

[@DB.KOOPER]

The 4.0L I6 is such a wonderful engine...

[@markcollard9326]

Thank you for actually showing Newcomer assembling the engine instead of the typical montage other videos show.

[@royb.1441]

Love seeing all the highly modified stock parts. Especially porting and bowl work on a cast iron head, thats killer cool.

[@johnthegiant320]

That shop is literally 30 minutes from my house!! this is amazing!!

[@Ayyjaxx]

I'm in rock hill I want to go check out both shops and maybe get a tune there!!

[@grad0n]

@@Ayyjaxx please do it!

[@spoolyboi9434]

Just looked them up and its about am hour from me, cool to know its stuff like this within driving distance

[@richardc7721]

I've always enjoyed upgrading the 258 in the CJ with cam, 4bbl intake and header set up instead of the usual V 8 swap. Ford 300 I6, also a platform for power up grades.

[@enso3140]

Really nice to see the other straight sixes getting some love too Here in Brazil we are kinda used to high horsepower on the chevy 250 but seeing the jeep 4.0 getting built to hold high power congratulations to the builder for trying something new and to the guys of the channel for documenting such amazing build

[@TheHorsepowerMonster]

Hey thanks!

[@martinvazquez5968]

Hello sudamerican neighbor, im feom Argentina and so we do

[@boston7704]

Enzo - I saw a fair amount of those when I worked in Sao Paulo, along with Falcons. Great car culture there!

[@matiasdamian8106]

I love every type of engine, of course v8 are one of my favourites, but let me say, there´s nothing more satisfactory than see that a solid, clean and powerfull inline 6, in this case it´s a jeep one, but i could be a chevy, ford, whatever, i can´t imagine what would be a car with this engine in it, almost 900 lb-ft under 5k!! and 861hp dude, and they stopped the pull just before 5800....... boy this is a totally KILLER street engine that i would love to have.. Amazing job to the guys from Newcomer Racing, amazing job people. Hope to see this beast again making ever more power

[@jessicacordova5024]

I agree, I am curious if you could keep it running at normal operating temps in a real application though. You’d probably have to do a lot to get a good cooling system figured out. Those 4.0’s run hot and I’ve seen a lot burn through head gaskets from running so hot. It would be awesome to stick it in an XJ and make a daily driver/rock crawler that has a lot of power to tackle any trail running 40’s-48’s you’d have plenty of torque to turn em no matter what you’re doing as long as you have drive train to hold up to it.

[@maldo72]

Love the fact its something different then every ls build ...

[@konnerkramer329]

Says the guy with an f body as a profile pic

[@c0c0asauce]

@@konnerkramer329 Maybe he's an LT guy lol?

[@konnerkramer329]

@@c0c0asauce lol I guess you have a point

[@ronniewilliz153]

Ues same here. Seeing everything ls swapped is getting old. Yes I know its solid engime but still.

[@maldo72]

@@c0c0asauce lol how did you guess lol lol 🤣🤣🤣🤣🤣🤣

[@wesbafguy]

Jeeps aren't my thing but newcomer is amazing. I love this channel.

[@Al-mx6ru]

Wow and I thought back in the 70s when AMC went racing with their Gremlin X 258 4.3lilter 7 main.N/A pushing 650hp n 700tq running low 11s 135+ mph. Running side drafts 6 pack of Weber's carbs. 12.1 compression. Shoved 202,168 valves from the AMC V8 heads. Into the 258 stock head. The AMC Gremlin X 258 l6 held the NHRA title for quite a while. It's clam to fame was popping wheelies. Great job guys. Keeping the stock components even better. AMC knew there shit there l6 are stout.

[@3rdGenGuy]

i think your power numbers are WAY off lol. NO way a 4.3L N/A would make 700lbft.

[@Al-mx6ru]

@@3rdGenGuy first off l saw it race I know its set up. AMC l6 were very stout engine. The engine specs are as follows 12.1pop up pistons,solid cam over 600 lift. 6pack Weber carbs. Modded stock 258 head. AMC went racing. Not some private guys. But AMC themselves. They had a l6 Gremlin running low 11s and a V8 running 7s. AMC backing. I think they mit know a little more than you or l. Those were the engine specs on there pro stock Gremlin X.258 package. I dnt think AMC would lie. They were very forth coming with there setup. They used the rods and valves from the AMC 390 engine in the 258. The rods were forged pieces. It wood carry the tires for a easy 10ft. That's torque. I've been blessed to have a gearhead dad that went to the winter nationals in Pomona every yr. Since the 70s till now.

[@2011metalmaniac]

@@Al-mx6ru did it have nitrous on it?

[@Al-mx6ru]

@@2011metalmaniac all those passes were N/A. AMC held the l6 NHRA title for like 20 some odd yrs.

[@2011metalmaniac]

@@Al-mx6ru something just doesnt add up. Were talking about an NA engine, running no boost, no gas, and no nitro on webbers making nearly 2.47 hp per ci. That would mean at 2.47hp per ci. A 426 hemi with a 12:1 compression would not make that (1050hp). The only engines in those times that i know of that would turn that kind of hp with no boost were F1 engines spinning at 14,000 rpm.

[@matty2helpfull]

I find it funny that today while driving my 97 xj I thought of turboing my 4.0 in my jeep then I get home and this pops up lol awesome video im impressed with the numbers this pulled

[@bryanrussell6679]

I've had several examples of the internet "reading my mind."

[@jamesgeorge4874]

The 4200 Atlas is starting to get some love too. Boosted I6 engines are dope.

[@drewnelson6463]

That's incredible for the ol six. And I would love to see a 4.9l ford under the same conditions

[@harleyfelts668]

PowerNation is doing a 300 right now

[@justletitsliiide]

You should look up the Ford 4.0 SOHC Intech, it's the predecessor to the "Barra" and it's insanely capable. They sound better than the Barra

[@drewnelson6463]

@@harleyfelts668 thanks for the heads up. But I'm already subscribed

[@octaviobourdon7287]

Yes my brother I've been a mechanic for a long long time I went to school after eat Smith high School in the Bronx and I've been doing it ever since and yes you can build the 4.9 six cylinder I had a friend that had one and he built it up to about 550 horsepower in about 496 foot-pounds of talk that is pretty good horsepower most likely more than what you need anywhere in the city but it's awesome to have it so your answer is yes I seen 4.9's built up it just takes a lot more money to build them up than the six-cylinder Cherokee it is a cheaper belt on the Cherokees 4.0 than the 4.9 you have to spend a lot more money on the 4.9 Ford belt 6 cylinder that is the big difference except if you have that kind of money extra to spend an overall I believe the 4.0 is more reliable than the 4.9 I hope this helped you my friend

[@Luckieoutdoors]

I wanna see it in a Jeep now!

[@bigsparky8888]

1st I MUST SAY...THE AMC 258 is my Fav 6 Banger to Date(Gasoline Wise)I have been a 6 Banger lover since my Dad owned a 49 Chevy...he bought a GMC 6 BANGER STILL PACKED IN COSMOLINE...But the difference between GMC & Chevy back then was not like 68 GMC & Chevy...parts will interchange if you know what is modified between the 2... I ended up with my Biological Dads 55 Chevy 2 door 150 model Wagon...235 w/3 on the tree...Modified head ports Put a Regrind "R" cam...3:55 gears in rear and an O/D trans in it...I COULD PASS BIG RIGS DOING SAME RPM...ALSO GOT 30+ MPG!!!!

[@matthewf1979]

That is just insane to see a one sided head pump out that much power.

[@codycall6513]

That was a sick video! Wondering how much it can take before it splits the block or raises the head. We should start a gofundme so we can find out

[@dano4572]

Yeah,, do a Holdener LS test,,run it till it throws a rod dyno run or spits out a bunch of things!!!!!!!!!!!??!!

[@revrndcast3918]

That bottom end scares me. I think that'd be the first thing to go bang.

[@Draxindustries1]

Anytime soon. This engine is only doing short bursts at max power on the dyno. Under load for any length of time on the road and at nearly 700hp the crank/ rods will break, blow a hole in a piston or two or six or split the block..

[@carmarusso3869]

I have always loved that motor! All straight sixes seem to be great. I didn't know that you can push this old technology that far beyond stock. Happy to see this.

[@livingthelife8443]

They are the best

[@tonyschiffiler4816]

That straight six is bad to the core , thank you.

[@El_Chompo]

It makes me so happy to see these old american inline 6 engines get pushed to such high numbers. The japanese inline 6 engines are so famous now pretty much just as famous as the LS. I knew there were tons of common inline 6 american engines in Jeeps and other vehicles that would probably be able to make just as much power with the proper turbo setup. It's so cool to see people finally doing it. The inline 6 is just such a good design. Why do you think all of the best diesel truck engines are inline 6. The price of 2JZs is starting to get astronomical. And really they aren't that special. Here we can see that pretty much any well setup turbo inline 6 can make big numbers. You don't need dual overhead cams when you have turbos. And it just makes everything that much simpler. This is actually something I had been dreaming of doing myself but without the time and money to do it I'm so happy to see others stepping up to get it done! There old jeep engines are so common and cheap. Great to see them getting used to their full potential. Time to start making some adapter kits to help others get to the same level. I'm sure there will be people interested.

[@uglymechanics6599]

This is about the most braindead comment I've read in a month. You clearly dont know shit about mechanics

[@Potatofarmer1898]

I was thinking the same thing... These engines are everywhere and less of a “fancy” setup and older design than a 2JZ... No VVT, 2 valves per cylinder, pushrod design... if Chrysler evolved the design of the Jeep 4.0 they could have had themselves a screamer.

[@MrCarnutbill67]

Did you just compare the Jeep IL6 to a 2JZ? The only thing they have in common is their basic shape. Haha, a 2 valve push rod vs a dohc 4 valve. Yep, samesies.

[@kennedy796]

You are totally correct. But i have to say that you are also partially wrong since people have been messing with the slant 6 chrysler for years. What people should be doing is figuring out a crossplane head design which for a i6 engine would entail making one into a overhead cam engine

[@RevengeAvenger]

This 4.0 the Ford 4.9 and the Chevy V 4.3 are all torque monsters. Nothing surprised me but the numbers. That's massive! Long strokes make gas look like diesel (minus RPM)

[@K-Effect]

It's awesome to see someone meet and exceed their goals, congratulations Newcomer!

[@keithnewcomer4406]

Thanks!

[@bearrett50kal17]

I like weird engines, I always thought Jeep 4.0 were awesome engines that deserved more aftermarket support and this video proves the engines potential. Also wanted to shout you out for the good video editing and no filler, just info and results.

[@scottt8942]

Artistry comes in all forms! Thank you, I love it.

[@PatricioGarcia1973]

They should take a look in Argentina, for the 24 valve head developed for the Cherokee engine used in racing there.

[@uptownsamcv]

AWESOME!! I love seeing old school engines built and boosted..

[@victoryfirst2878]

Hard to believe that a straight six engine can stay together and make killer HP with old technology to boot. Well done fellas. V

[@victoryfirst2878]

@Sofiane Ben I have to tip my hat to you Sir. Job well done. !!!!!!!!!

[@paulplack490]

I'd love to see this on the street in a 2800-pound '68 Rambler American!

[@jmflournoy386]

At 1000 hp the BBC pins flexed and kicked out the double spirolox in the Forgedtrue pistons We went to Chrysler top fuel pins in BRC pistons 3.750 + .010 to stay under the 210 cu in limit no problems with either the Nodular iron cranks or the Armasteel castings How much dependable HP you want to make with your AMC just depends on how brave you are (It could have been the Piston Pin boss design IDK) i like long rod strokers with tight quench which I find are more tolerant of timing and gas quality but I never built a short rod tight quench motor Put several hundred thousand miles on our 77 Pacer wagon On the street or rock crawling I like the extended tip plugs I ditched the AMC box and used a FORD AMC 360 999 trans with lock up and double wrap band transgo kit- bulletproof

[@paulcooper2897]

Those 4.0's were always a strong engine.. loved mine and it outlasted the Cherokee... that's seriously impressive numbers! Those that say it can't be done simply haven't tried hard enough!

[@SigmaWolf-in2mr]

Brains and tech, have come a long way. If I needed one of these builds, I know where to go. Thanks, Fellas.

[@juanf4739]

Great build and thank you for using mostly stock parts and showing their potential. 👍👍👍👍👍👍👍

[@trillrifaxegrindor4411]

nothing left even remotely stock,the "previously but no longer" stock head would cost 5x what the best aftermarket aluminum head you could buy would cost.thats close to a 100 hours of labor at $200 an hour easily......the block is almost full of block fill and would die a quick death in anything but short dyno runs or drag strip runs

[@juanf4739]

trillrif axegrindor I meant using stock parts , they are modified but stock parts nonetheless. You should try building your own stuff and stop paying $100 an hour on labor. Just because you use your credit card to have stuff built doesn’t mean we all do.

[@elonmust7470]

@@juanf4739 So when was the last time you ported heads and balanced a rotating assembly???

[@brucewilson1958]

I drove a Cherokee up to 200,000 miles in the 90s. This was really fun to watch. Serious power! Nuts.

[@Toolery357]

Mr Newcomber, you sir, are genius! Well done!

[@MeatPez]

I’ve seen this video 5 times and I learn something new every time

[@MP-km7dk]

WOW!!! JUST OUTSTANDING! Congrats on that build.

[@anasevi9456]

Beautiful work, love seeing that AMC I-6 not just get to stretch it's legs, but fly faster than anyone could have ever imagined for a relatively unchanged design decades older than any other continuously used I-6 family.. In a weird way it shows the AMC I-6's have a lot more in common with pushrod American V8's than any european or asian I-6. That waterpump hack so you can strengthen bored walls; just brilliant! Newcomer are legends

[@hbetz5300]

I would love to see this with a Ford 300. I wonder if the little extra displacement would do much

[@ChargedTTq]

It's not the displacement that would help, it's the fact that the whole block is made for the displacement. A 5.0 could easily make more power if it had an equivalent head.

[@Parents_of_Twins]

The Ford 300-6 can make a lot of power but the real issue is the head. I saw one guy take 2 or 3, sorry can't remember, LS heads and put them together for the engine. There are ways of getting around the factory limitations if you don't let people convince you it can't be done.

[@Levibetz]

The head is going to be the limiting factor. I think the 4.0l is probably the best head of all the old school inline 6s. Lump port chevys seem to do pretty well too though weirdly.

[@Falcon_Futura]

In Argentina we use the Ford 188 and the 221 cubic inches. They are famous to rev up to 9.000 RPM naturaly aspirated with a mild preparation and pump gas. I would love to see a Ford inline six naturaly aspirated the way it is modified in the US.

[@Levibetz]

@@Falcon_Futura The shit that's done to old I6s in Argentina is incredible! I wish there was more information and or parts available to idiots like myself who only speak/read english. I'd love to get my hands on one of those DOHC 'cherokee' head setups that I believe exist for Turismo Carretera?

[@areyouundoingthatorwhat9181]

We don't see many of those straight sixes here in the UK but the ones I have come across from time to time always sound sweet regardless of the mileage and level of sympathy the owner has bestowed upon them,we had similar engines over here but they are long gone sadly.Most of the stuff we do now is 4+6 cyl Duratec based,the last old engine I worked on was a Chrysler/Jensen 6.3 about ten years ago.The best part of that was seeing what is essentially a dinosaur push out 860 hp and 850 plus ft lbs, mightily impressive.even non boosted that low comp engine was stout and outperformed the factory spec by a country mile. What's not to like,top stuff.

[@kevinyech984]

A Cherokee with 800 hp would be such a flex

[@TurboWorld]

Great Job! I have felt like for years this engine was capable of so much more, as many are. I always enjoy seeing someone do different things! We do Volvo 4 bangers.

[@timewarpvideo6244]

I love these ridiculous builds. And I mean ridiculous in a good way

[@bryandouglas739]

My second favorite motor ! I just love the I-6 engine so reliable and easy to work on and smooth as glass when running properly.

[@grunfieldf8694]

Never thought I would see 800+ out of jeep engin,awesome! Like to see a Ford 300 six.

[@young11984]

Grunfield F that’s been done years ago lol

[@KoreyByrne]

Have a look at Ford Australia’s online 6 motors in the thousands of HP now

[@young11984]

KoreyByrne yea but the dohc technology made that possible, wouldnt happen with a single solid cam and 12” long pushrods....well not as cheap anyway lol. Got my Barra yesterday and plan on only 500whp max on stock FG with springs and OPGs

[@KoreyByrne]

@@young11984 that’s easy power my Barra did 330rwkw easy

[@repalmore]

Something you just don't see on most any other engine configuration is that nearly flat torque curve. Awesome build guys.

[@joeymccullough2716]

Just imagine having a NA 500 hp straight 6 in a daily driver CJ-7. Sweeeet!

[@cumminsman4670]

How can u get 500 NA HP ??? From a I6

[@trashbandit2449]

@@cumminsman4670 a million RPM

[@AntiPattern328]

I knew these 4.0L Inline Six engines were awesome but I had no idea they were that capable. Now you're going to get me in trouble again. Might be time for the Holley system, header and head on my old 97 XJ.... :-)

[@mavsformulaful]

Take a deep breath "know it all" commenting.. Love it, great 4L build. Ive had a 4wd ZJ to daily in HS and a Trail Rated WJ ever since, and just now about to sell the last one. 4L is astounding but Im just not crazy about a solid front axle daily...

[@IRONHEAD12701]

My 88 Comanche Eliminator was a badass little truck. It lasted close to 25 years (September 1987 - MARCH 2011) and over 300,000 miles. Many trips to and from Florida to N.Y. Thanks for showing that an old work horse mil can put out high H.P.

[@Azlit]

I just want one of those 300+ entry level engines from him. I definitely have to save and double my engine budget now for sure.

[@MegaJavelin1970]

Glad to see a modern build of the AMC straight six. Always liked Barry Navaro 199 straight six AMC for the 60's indy project that did 700hp.

[@marcusv5657]

CONGRATULATIONS ! ! if yur going to beat a world Record that's how you do it. . SMASHING IT ! !

[@TalonPro]

:::nonchalantly pushes dyno throttle::: "what record?"

[@rlikemoney]

Thank you horsepower monster! And you too newcomer! Killer build. Always fun to watch

[@TheHorsepowerMonster]

Thanks!

[@keithnewcomer4406]

Thank you, much appreciated.

[@autonomous_collective]

Thanks for sharing. I've been waiting for this for about 6 months.

[@TheHorsepowerMonster]

Thanks!

[@chadwilliams8741]

My 4.0 jeep kept feeling like it was loading up on fuel, slight misfires, stumbling, ect. Finally I heard what sounded like an arc, I could hear it but couldn’t see any spark. Came across this video and tried it. 2nd plug I sprayed! Ceramic on the plug was cracked! Replaced and runs like a sewing machine again. Thanks for the video

[@pauljs75]

Now somebody needs to get that into an AMC Eagle and show up at the next Pike's Peak run.

[@richardcarr6493]

THAT WOULD HILARIOUS TO SEE THE LOOKS IT WOULD GET AND AWESOME

[@samsoteriou6137]

I just bought a 95 jeep Cherokee it was a barn find in outback Australia blistered paint and all the typical stuff no dents no rust hadnt been used for 4 years. New fuel pump started straight away. Now that i have been reading about this motor i dont want a new 4wd. Jeep got it spot on. I will get a new paint job and keep this magic little beast.

[@CanadaBud23]

I'm glad more and more people are coming around to build these. I always knew they had big power potential. I'm using Zack's stuff but the idea is the same.

[@CanadaBud23]

I'ma drop this comment since the guy I was arguing with ran away and I couldn't respond. About crossflow head and/or DOHC... You can't do this to this engine without a major redesign of the heads and block and all the internals. It would be cheaper and easier to build and design an engine from the ground up from scratch! Stop asking for this crap because it sounds dumb. It'll never happen unless you have very deep pockets and connections with resources to build. It's pointless might as well use something else instead. These motors as is are capable of over 1xxx hp, crossflow shit and DOHC ideas are not needed. Anyway I see this response a few times in the comments already.

[@justinjones9042]

That is seriously impressive out of a Jeep 4.0

[@thehappytexan]

As an r&d record breaker engine, I would love to see this thing ran on methanol for the ultra cool iat’s and see what it can do set on kill. I’m sure his setup can make 1k hp no problem on meth. Not that he has anything left to prove. The dude crushed the record.

[@trillrifaxegrindor4411]

the guy is smart,he isnt going to make idiots happy blowing it up when he destroyed the record on a conservative run

[@beargibson3100]

@@trillrifaxegrindor4411 Get back under your bridge. This engine is more popular than the 5.slow in your tranny am

[@colocker18]

CAN NOT WAIT for you guys to go back and see what it can handle!

[@larryw5429]

I would love to see this set up at the track lol!

[@jmflournoy386]

1,200 HP on Champion spark plug dyno twin turbo 60 lbs boost Methanol199 block with steel straps on the stock main caps and stock head bolts in the mains, stock 199 crank Carrillo rods Brooks pistons with Chrysler Hemi pins Chrysler 6 sodium filled exhaust valves, TRW unobtanium intakes, TRW rings Ed Winfield Cam later smaller port head but with shaft rockers and thicker deck 500 miles at Indy Delco big black box CD ignition. AMC block is the strongest 6 cyl motor to build. Wish we had later heads to use for a base copper head gasket with Bellevue o rings, stock head bolts 500 miles at Indy AMC car was quickest off the corners as twin turbos were staged where one reved up then the second blended in with a cast stainless Y diverter valve You could get boost just winging the throttle no intercooler would have been nice as the charge was cooled with richness then INdy put in the fuel limit rule which ment we would have had to run leaner cheers

[@TheDevonwurz]

I wish there were more after market for these beast engines

[@alexandrelefebvre3847]

Big thanks from Québec Canada 🇨🇦

[@sisimons7998]

ANYBODY UP FOR A 4 WHEEL BURNOUT AT 70MPH. ,,,, OORAHH !

[@THESLlCK]

That power curve is SO DAMN FLAT, I love it so much!!!

[@blacksquirrel4008]

That was what struck me, as well. Right off idle it was almost all there.

[@C42ST3N]

Which makes it super driveable on the road but will cost some hp at the top.

[@redrider999]

Nice 👍🏻, has anyone ever done a max effort Ford 300??

[@hbetz5300]

Should’ve read your comment, I just made a similar one

[@RadDadisRad]

No

[@hyattbusbey3563]

There are such builds. One guy welds two LS heads together to make a 300 head.

[@joshdenham8404]

Yes. Tons of aftermarket support for the old Fords

[@LWRC]

This is what American ingenuity looks like!! Fantastic. Granted there were a lot of development and custom fabrication but this shows what the old engine is capable of. This is how much HP & TQE the factory left on the table. This turbo I-6 made more HP & TQE than some of the LS engine swaps from other fabricators that goes into the late model Jeep JK Wranglers!!

[@arthursmith5409]

Looks like a straight contender for the 2jc and Barra Ford guys.,! Can only imagine with a race built head and better turbo.

[@evilroyslade6477]

I like this build it was a good watch and the number is impressive. But Sorry Not a chance against the 2JZ RB30 or Barra .... sorry.

[@brendo7363]

It won't rev, heads don't flow, ports are on the same side and he's having to use water/meth injection at only 200hp/L to try to keep intake temps under control. It's an achievement to get that power out of this engine but it's never going to make good, reliable power on the street like most other L6's can.

[@riogrande163]

@@brendo7363 well, to be fair, these things fair better than most other 50 year old design inline 6's, and seeing as the 2jz and barrs are much newer designs/revisions, i think we can cut the 4.0 a break.

[@brendo7363]

@@riogrande163 Here's a 50 year old six kzbin.info/www/bejne/fXSydGaggLOSepY&ab_channel=Fullboost

[@amarpreetsingh2378]

I can just see that confidence on his face while building engine. Showin middle finger to all engine builders.

[@pdbnc]

What an absolute madman. I love it.

[@shekharmoona544]

That man is an artist and his creation is beautiful. I'm not crying, you are. 😢😢😹😹

[@mpetersen6]

Well, this answers one question. A 4.000" bore in a 4.0 inline six. I'm kind of surprised that Newcomer hasn't made their own replacement for the block gridle. When these engines were assembled in the factory there was a special tool we made in house for installing the lifters. There were 4.0s that were modified to use roller lifters. These were built for engineering test purposes. I suspect the power gain versus cost was not justifiable.

[@Levibetz]

I've heard of a guy boring a 4.0l out to use 6.0l LS rods/pistons. Blew the fuck out of my mind hahaha

[@mpetersen6]

@@Levibetz Where there's a will there's a way. Normally trying to go .120" over stock bore size is going a bridge too far. I would have thought the only way to get a 4.000 bore in a 4.0 block would be to completely punch out the cylinders and fit a sleeve that has enough wall thickness. Normally the cylinder walls are thicker at the top than the bottom because when pouring the casting the mold has draft anglesto make it easier to get a proper pour. As a side note VAM (AMC's Mexican subsidiary) built 252 and 282* CID versions of the 232 and 258. They opened the bores up to 3.880 or 3. 875. The increase in displacement was needed to compensate for power loss due to lower octane gas. I've heard but cannot swear to whether or not these blocks have heavier wall thickness cylinder bores. *in some ways the original stroker.

[@bryanrussell6679]

A lot of people think water/methanol injection is basically snake oil. On naturally aspirated engines, you see very little gains, if any. But when you use it correctly on a forced induction engine, it works. The engine really responds to the cooler, denser air if it's tuned for it.

[@TheHorsepowerMonster]

Absolutely true

[@georgef1176]

What a cool set up. Simply amazing!!!

[@Bhall958]

OMG IM ALREADY LOVING THIS VIDEO JUST BASED ON THE TITLE, and because i currently daily a 98 grand cherokee limited with a simple hopped up 4.0 that has a few extra degrees of advanced timing, i just rolled over 150k about 2 weeks ago and my truck just screws

[@greynolds17]

Meanwhile im here just happy I can get about 8 psi on a stock 4.0 with 200k miles without it blowing up.

[@TheHorsepowerMonster]

That's still pretty awesome.

[@CanadaBud23]

It's all in your tune man 😁

[@nate4036]

My Kenne Bell 1.33L makes 6lbs on the 4.6 in the LJ, boost makes the in-line engines a joy to drive.

[@bluntman305]

Seal’s

[@offroadyaris5257]

That's awesome! 8 psi is still something more

[@jonathansparks7558]

That turbo charger whistling is music to my ears

[@1crazypj]

I'm not a 'Jeep' person but that was real impressive. A modified stock head - wow. Pretty much always been told it wasn't possible as cast iron doesn't allow enough cooling for big HP numbers, NA or turbo/supercharged

[@brandonpanozzo86]

Guys have been using cast iron for years and years to make 1000+ hp on multiple platforms though

[@1crazypj]

@@brandonpanozzo86 True, but what was the reliability? Usually piston crown is running much hotter and disintegrates even when everything is set up 'perfectly'. I have very limited experience with methanol water injection, although know it does substantially reduce temperature

[@brandonpanozzo86]

Guys have been doing it in BBC bbf and 4g63t since the 90s and the failure on the 4g63ts is the rods

[@elonmust7470]

@@1crazypj there're plenty of iron ls blocks making lots and lots of power. Same for iron nissan blocks.

[@1crazypj]

@@elonmust7470 I know iron block motors can make a ton of power, but, they usually have alloy heads. With iron head cooling is always a problem as cast iron doesn't conduct heat as well as aluminium. (the biggest issue is exhaust valve temperature not combustion chamber temp) Low boost and lower temperatures are fine but high boost is generally drag strip only (unless you have large 'Rocket Turbo Boost' fluid reservoir)

[@billwheelerman1359]

With a Flat Tappet cam, a stock head and no vacuum pump. That's amazing!

[@hugieflhr03]

Wow, that is diesel crushing numbers. Imagine if something like this could go into a production vehicle and be reliable.

[@nickthompson9697]

Ford tried with the ecoboost.

[@mpetersen6]

One thing power train engineers had to do was run production engines at full throttle for 500 hours iirc. That's three weeks non stop flat out. Let's say that equates to 100 mph for an example. That's equal to 50,000 miles.

[@nickthompson9697]

Rookie numbers.

[@mpetersen6]

@@nickthompson9697 Compared to a diesel used in a semi true. The 500 hours was with no appreciable wear on the engines. I'm not sure how they handled the oil change cycle. Either shut it down at the hours it takes to get to the required mileage or use an oiling system that had a really large capacity. I suspect they did the regular oil and filter cycle. One gauge I think they should have put in cars a long time ago was a engine run time. 3000 miles on a car that idles in traffic or a police cruiser idling at for hours every week is a lot different than one driven at moderate or highway speeds. Look at the trouble that Chrysler and GM is having with camlobe wear on Hemis and LS's. At idle the Hemis just aren't getting enough oil to the lube and roller. Chrysler raised the camshaft so high the lifters are pretty close to horizontal. So any oil that comes off of the lifters themselves has no chance to fall on to the roller or lobe. The only way the lobes or lifter rollers get any oil is from oil getting thrown of of the Crankshaft and connecting rods. In addition there is an oil galley cast into the block in between the camshaft and crankshaft. On top of that although there is an oil galley to supply oil to the lifter bores the hydraulic portion of the lifter is supplied through the push rod from the valve train. Chrysler did the same thing on the Slant Six when they changed over to hydraulic lifters.

[@timm.6391]

@@nickthompson9697 They should have "ecoboosted" the 300 6.... in my opinion.

[@paulsprague3900]

I owned a jeep with that motor for about 12 years. Never let me down

[@blkcoupequattro]

Stock crank, amazing in it's own right

[@chadbothern7255]

Newcomer is the best. I'm saving my money to buy an engine from him. Pair that with a transmission from Precision Transmission in Amarillo Tx.

[@coreyrowe2052]

Man! This was fun to watch!😀😀😀

[@jethrow243]

This is something the jeep community has needed for a while bc you know that monster is making some serious torque down low from that flat torque line especially with a little boost