THE OTHER GUYS AMERI-BARRA (JUNKYARD ATLAS 4200) WHAT MODS WORK?

[@TheFarCobra]

It would be interesting to bump the physical exhaust timing up a tooth then use the vvt adjustment to see where the optimal is.

[@Joshie2256]

Agreed. Retarding the exhaust cam gives more overlap. I would like Richard to quantify the overlap and lobe separation angle.

[@PetrolHeadMike]

I think Calvin was working on trying that when he was having issues with the vvt and he locked the vvt out and just ran it retarted by two teeth and the thing under boost was a monster

[@802Garage]

So glad I found this channel. Ain't nobody else doing this kind of testing.

[@Airman..]

Thanks to everyone participated in this project

[@TurbineResearch]

Props for over coming the issues with the snapped head bolts and getting another motor to slap on the dyno at short notice. Your a legend! Keep it up

[@thejo6331]

I love this series! Awesome stuff. Mad props to Calvin for putting in so much legwork to enable the community on the atlas platform!

[@richardholdener1727]

Glad you enjoy it!

[@ZackNakazora1]

Hell yeah! Finally! 4200 gang!

[@jr78racer]

Loving the sound of that six. Can't wait to see the turbo numbers. Thanks Richard for testing something other than an LS!

[@flexall7408]

Big I6 is impressive. Sounds amazing and runs 1000% smoother than a V motor. That power curve is fantastic! Now we need to see the rpms around 9k with a custom cam and I'll bet we could see 500hp n/a. Great stuff Holdner 👏👍

[@shadowopsairman1583]

V8 is still far more smoother than a four or six because of the power bands being closer together.

[@flexall7408]

@@shadowopsairman1583 I'm talking about how it feels to drive. Being a Man who's driven high power i6 as well as v8 I can tell you with absolute certainty that an i6 is far smoother, even with big cams.

[@unlisted9494]

@@shadowopsairman1583 wrong. I6 is inherently the smoothest design because it by design suppresses third order harmonics due to the cylinder timing. This is why mercedes at their engineering peak used exclusively i6 and V12 engines in their luxury cars

[@unlisted9494]

Trust me man, the 4200 guys have been begging for custom cams to go into production for years now! Sadly, the market is just too small

[@ChiefCabioch]

Inlines have serious torsional crank vibrations above 7000rpm, the V6s will rev atleast 8600 rpm, and more, and that was with a flat tappet mushroom lifter cam

[@gonzalofernandez7462]

i am impressed with the flat torque curve when activating the vvt arround the minute 4:42.

[@johnhull6363]

Dude with the stude knows these for sure, not my kinda motor, but credit where it's due, Richard I hope you give us a big bang barra

[@slicktop2jz855]

Unless hes using a genuine aussie barra, stop calling it that. Its named after the barrimundi for a reason.

[@johnhull6363]

@@slicktop2jz855 I call it the Hanna Barbera cause it's gonna pop like a cartoon champagne cork

[@jeffwilliam7500]

Barra? We call them blow fish in Australia not the barra

[@slicktop2jz855]

@@jeffwilliam7500 Right. Not in SE qld we dont

[@thewraith6360]

The torque of a v8 with the sweet sound of an inline 6, hard to beat that! I was thinking a 7875 might be a bit lazy on the transbrake with a 4200 but after seeing it make that much torque i think she'll spool a 7875 just fine, which is awesome.

[@GIGABACHI]

I prefer much better this format than the live sessions. You do your testing at your own leisure, put together the video, again, at your own leisure and then we just get to enjoy high quality dyno sessions. STAY AWESOME ! 👌🙂👍

[@richardholdener1727]

AT MY LEISURE-THAT'S FUNNY, THE EDITING STARTED THE DAY OF THE TEST AND THE VIDEO WAS POSTED 7 HOURS LATER.

[@GIGABACHI]

@@richardholdener1727 I'm not telling how or when to do it, that's up to you. It's free content, that's all I care. 👌😎

[@pedrogiavani2330]

Just to let you know, these motors work great with a fresh air intake. I put one on my 05 Trail Blazer with a magnaflow cat back system and it was a noticeable difference in torque and drivability. Also, it upped my gas mileage by an average of 2 mpg over a three year period (all types of driving, year over year and life time of truck). Worth it.

[@voidisyinyangvoidisyinyang885]

what kind of fresh air intake did you use? Do you think the air intake upped the mileage or was it more of the magnaflow cat back. I put in an AEM dry flow and now get 1 mpg increase.

[@pedrogiavani2330]

@@voidisyinyangvoidisyinyang885 I used an Airaid intake with an Airaid carb spacer. It all worked together. Not sure is any of this is available now as it was 2010 when I did my upgrades.

[@jaydnisevil]

Nice to see something other than junkyard engines again. Somebody still needs to send this man a FG F6/XR6T BARRA

[@BEANS-O-MATICtransmissions]

Absolutely LOVE this series on this engine !!! Always wanted to see how these would do. Thanks to Richard and all the people that help make it happen !

[@aaronwalker1507]

The funny thing is most Americans don't know what the barra engine was actually named after a fish ,a barramundi

[@TheFarCobra]

Every time the opening montage music comes on I do the Richard Holdener dance in my living room.

[@richardholdener1727]

ME TOO

[@MrTheHillfolk]

I get my party boy outfit from jackass on before I click.

[@ZackNakazora1]

The fact the header doesn't make power is interesting to me. Of note this is a 05 motor with the small port right? Wonder if the head is the limiting factor then

[@ZackNakazora1]

@@turbojetpowered8299 good idea but that's alot of R&D work for not alotta gains. My guess Is the head ports are the restricting limitation currently if there's a jump in power with the current header with the later head then the tune head might be worth going for

[@needmetal3221]

I think those ports need mr die grinder.

[@williamking8684]

In 2006 these 4.2 jumped to 290hp so gm definitely did something

[@corvetteZ3r]

@@williamking8684 yea a lot better heads. When of the guys that helped with this test is doing a ported head 06+

[@mghuertas]

Awsome thanks for sharing Puerto Rico is on the house 🇵🇷👍 waiting for boost 🤣🤣

[@Calvin-Nelson]

Awesome video!! Way to go Richard!!

[@tmacie2]

I wonder if @Fasterproms has watched? LOL

[@derekhansen6652]

You were the first person I've seen use this engine, In that old studebaker. Really cool👍

[@Emilthehun]

I love this engine. My envoy has 279k miles , and still pulls hard. Can't wait for the boost part of it

[@wxmt95]

Richard you should check out a Mercedes M104 I6

[@MississippiDan1]

Sweet! VVT huh? Hmm... That should be very interesting with the turbo... Can't wait!

[@km6832]

Puts air intake mouth right where the radiant heat from the exhaust is. Needed to group cylinder firing order for gains on the header

[@tylermcintyre5177]

That may of been what made it loose power up top.

[@jeremykastrup6907]

Radiant heAt has zero effect on the dyno cell . You think the air entering that inlet changed much over rooms ambient temperature 🤒 honest question

[@gothicpagan.666]

@@jeremykastrup6907 Not during one run. 6 into 1 manifold comes into it's own with longer duration cams. Though that turbo designed manifold is possibly too short. For N/A motor start at about 28". Or least that's what a BMW 3Ltr with peak power at 8800rpm requires

[@richardholdener1727]

VERY SILLY COMMENT-YOU NEED TO SPEND TIME IN THE DYNO CELL

[@km6832]

@@richardholdener1727 unfortunately i dont have friends i can go by when i feel like to use theirs

[@benhowe2087]

Looks like it would respond to larger cams.

[@unlisted9494]

Yep! Sadly, nobody is willing to make them. Guys have wanted them for years, me included!

[@danieldimitri6133]

We get so used to headers universally working on v8 engines but a v8 has odd firing patterns on each bank. Each bank has a 90degree pair which may cause reversion on a log manifold, the manifolds are often designed to save space and rarely have long branches. On inline engines there is plenty of room for long branch manifolds with flow in the same direction. The pulses are a bit farther apart and probably at a good angle for scavenging. IT might be possible to get gains from a header but i think youd have to see what the peimary length is, where you want the added power, have an extension pipe the same length as the primary pipe (including exhaust port) and you might need a smaller extension pipe size than youd expect. I don't know how big your primary is, thats always hard to tell. Some engines se to like huge primaries, some dont like it at all.

[@Averna222]

Considering these only have vvt on the exhaust for egr with no consideration for power I'd just find where it makes most power by mechanically adjusting it and lock it out at that.

[@zarkeh3013]

my thoughts as well. VVT must be for emissions, maybe for reducing NOx without needing an EGR?

[@rvsteve583]

the most intersting gearhead content on ut, can't get enough..................................................................................

[@jwilliams703]

Very cool engine. Till now I had no idea chevy made this. Thanks Rich.

[@chrisvance8220]

Very cool. Just bought a mint 2007 4wd lt. was curious and boom. Remembering seeing an old Ford ltd on KZbin that has a boosted 4.2

[@TurboJohn74]

Much love for the MS system. This 4200 sounds awesome!

[@MrBigR928]

I would've bet money on a power gain with the long tube headers! So a good tune & a good cold air intake is a good start 👍🏿 I have the 2005 & was disappointed by having the lower flowing head but love that bottom end🥰 Good to know the 2006 head will fit the 2005 block👌🏿. Awesome video 💯👍🏿

[@adamwebster9784]

Love that header design!!!! Sounds awesome!!

[@thetransformatorium7980]

Wow, look at that almost flat torque curve! Sweet! 😁 I think the header test just showed how good the factory manifold actually is. Put a log style exhaust manifold on it and watch it lose 75 HP. Cheers all!

[@supercuda1950]

These headers would fit the stock vehicle ala headers out the hood (tractor pulling style). They also serve as window deicer during the winter!

[@kraftzion]

It would be interesting to try it without any exhaust. See if the pulses are interfering with each other like they do when a v8 fires 2 in a row from the same bank.

[@DrFiero]

Didn't know what the numbers would be, but no surprise on the VVT making a difference - the solenoid on mine ('05 with 350K) gets a bit sticky at times, and it's amazing how much difference you can feel under your right foot when the solenoid doesn't come on!

[@robsvideos13]

Had a O4 2.8 4cyl version with a 5spd stick in a canyon - it was a blast... Only thing it needed was a K&N filter to breath better... Surprisingly GM didn't leave much power to be found later (without boost....) on these atlas motors - close to max right from the factory...

[@shadowopsairman1583]

Yup dependable power.

[@divadyrdnal]

Very interesting! I know it was a lot of work to get it on the Dyno...now bring on the boost!

[@patlandymore7035]

This is awesome content! Can’t wait for the turbo sounds to begin. I’m guessing 600 x 600 at 15.5 psi otherwise stock 😁 By the time you’re done this testing sequence Richard, you will have single handedly caused the price of JY 4.2 6’s to double across the country! 👍🏼👍🏼 😂

[@CS-bp3dq]

Killin it with this project my guy. keep the great videos coming.

[@justinsmith847]

Sweet I've been waiting for this video

[@FuelSparkBang]

Awesome content as usual! Very excited to see what’s next. Love to see what you can do with the vortec 3500 variant (4200 minus one cylinder)

[@kennethstephens8046]

Or 3700

[@jamest.5001]

I guess the gains from long tubes, is already gained by the variable cam timing! I'm thinking about one of these for swapping into a 53Belair, with a small turbo, making about 10 psi +/-, depending on the turbo test, maybe 8 or 12psi, or 25psi haha, I think 400+ HP is plenty for a cruiser!!

[@randyhavard6084]

Love all the enthusiasm, 👍

[@retheisen]

From the front, that engine looks kinda like the late 80s supra. I think it was dohc but only 2 valves per cylinder. The blocky timing cover does it for me.

[@Levibetz]

So cool! A couple ideas, I'm endlessly curious about harmonic dampers on these long crank I6s, hopefully you'll try out the BHJ damper they do, and see if we can see crank harmonics in the dyno curve before/after. The other thing I'm so curious about is why does one engine respond more or less to a header change? Does it have to do with camshaft design? Port design or flow? What's the deal! I've noticed the AMC 4.0l has a similar deal with headers, they don't make big gains. But those engines also have really lame cams typically and fairly poor exhaust port flow.

[@tturi2]

I'd love to hear this with a big set of cams

[@littlebearish]

Man, I've been waiting for this inline stuff. I'm beyond ecstatic to see what you can do with the Chrysler slant six and the Ford inline six along with this thing. The GM 292 was amazing so I can't wait!

[@tomcelica]

Ford had an inline 6 300cid engine in the 70s trucks, didn’t they?

[@littlebearish]

@@tomcelica Correct. Starting in the mid 60's up to 96.

[@tomcelica]

@@littlebearish up to 96? Wow that’s a long time lol

[@scotttimpany2845]

Disappointed that the header did not add/lose any significant power. It's a sexy piece and someone put a pile of effort into it.

[@justin_parks]

Can't wait to see the turbo go on!

[@erikrummel6277]

Can’t wait to see the turbo tests

[@JyveKilla]

I'm enjoying this series.

[@kensshop7999]

Would love to see you put a Toyota 22re engine through it's paces and see what mods make power and what is its breaking point. Awesome content by the way keep it up.

[@watsisbuttndo829]

The intake port on a 22re is a debacle. Its a hangover from its carburetted days and a "high swirl" type economy and emmisions port. I dont know if just a matter of grinding it out but have been told a 20r head bolts on and has a more conventional port. Would like to know whats possible as well.

[@kensshop7999]

@@watsisbuttndo829 the cylinder head from what I've been told is a nightmare stock, but with the right porting can flow some big numbers for a 4cylinder. I've heard of some guys saying the block won't make it past 350 but than I've heard stories of guys making 7-800hp I would love to see him push the limits of this little 4 banger and see what mods really work and what's not worth the money.

[@surreallife777]

So far I’ve never found anybody who’s built this kind of engine. I wonder what combination will produce a quick revving, high revving responsive Ford Windsor V8 for the street. More like Ferrari 355 V8 or an F1 engine. With no flat plane crank of course.It would be really interesting to see what combination would produce this kind of engine? Short stroke, small displacement, compression, which cam, which heads? etc.

[@DodgyBrothersEngineering]

Great work Richard, would be really great if one day you could do a stock 2JZ with VVT. Would love to know what potential is hiding inside.

[@Silkmaster4200]

Seen one at the GM dealer. Around 118k miles 03 Oldsmobile Bravada navy blue kind of colour. It has Atlas 4200. Good shape might buy it and do a turbo built lol.

[@shadowopsairman1583]

Do it

[@yolofullsend]

Awesome.. looking forward to see how much boost it likes

[@houseoffire72]

⭐️⭐️⭐️⭐️⭐️ Maybe my 06 Trailblazer will get a few upgrades.

[@bcbloc02]

Keep the testing coming!

[@shannonsisk]

Very interesting that the header did almost nothing. The restriction must be in the head somewhere or cam, not the exhaust

[@xozindustries7451]

I knew that those motors are impressive after owning one new. I am surprised that the header didn’t pick up power, mine cracked the manifold twice in stick form, that’s the only reason why I wanted to go to a header.

[@ttank1994]

Does anyone else think this 4200 is down on power? If you contrast this with an early gen 3 5.3 factory rated 270-285 hp range which is similar to the 4200 rated in the 275-285 range the 5.3 will put out about 350 hp on this Dyno, yet the 4200 is in the 290's. GM rates both these engine with SAE standards and Richard is doing all the same things with the 4200 vs 5.3. what am I missing?

[@T..C..M]

Same! I was expecting 300hp right out of the gate. No air filter, no cats, no full exhaust system, no accessories. Modern engines are rated with all those things mounted to the engine.

[@SoulTouchMusic93]

That torque plank!

[@richardholdener1727]

PLAN OR PLATEAU

[@SoulTouchMusic93]

@@richardholdener1727 it's flatter than your girl richard!

[@jamieschinkai1267]

@@SoulTouchMusic93 you must not have seen his girl

[@BigMikesGarage]

@@jamieschinkai1267 Right. She's very fit and smoking hot!

[@bdugle1]

I don’t see any “variable” to the cam timing, just retarding the exhaust cam to a different fixed point. It’s odd that the torque curve went up everywhere with that change-just means the “relaxed” timing of the exhaust cam is wrong as far as power is concerned. Am I wrong? Maybe it does something at part throttle or to emissions or something. On that header, maybe it doesn’t like 6 into 1, two 3 into 1 collectors might work better? Looking forward to what boost does! How about 60 psi or so? Thanks, Richard, great stuff!

[@klampykixx]

Would love to see you do this sort of back to back on a jeep AMC 4.0

[@wtdonovan]

BRO. Like 1.16 hp per cubic inch stock engine tuned? Great start! Is there more to be had with cams, ported head, intake swap? We'll seeeeeeee (evil laugh)

[@kevin122759]

I had this motor in my 07 trailblazer. One of GMs best engines. I wish they would have put it in half ton pickups instead of the 4.3 v6.

[@mfree80286]

@@BuzzLOLOL scratch 'prolly' and insert 'definitely'.

[@ryanzenzen9088]

Can't wait to see a power adder!!!

[@mitchellcrawford1613]

Hi Richard. I'd be interested to hear thoughts on why it didn't respond to the headers. Thanks.

[@OgamiItto70]

Cool test. I wonder if a straight 6 version of a tri-Y header would've been more effective than the 6-into-1 setup.

[@OgamiItto70]

@@BuzzLOLOL Could be. Definitely _somethin'_ ain't right when a DOHC, 4-valve engine is barely making more per-liter HP than an OHV, 2-valve one from the same manufacturer, even with lots of upgrades. I don't really know too much about these "Atlas" engines. Others in the comments here have mentioned that the exhaust port volumes may be too low and that's why headers or exhaust manifolds that _should_ show improvement don't. And why exhaust timing changes are so effective.

[@richardholdener1727]

I THINK A TRI Y MIGHT BE BETTER

[@jonathan7744]

I'm curious why putting a better designed exhaust on it hurt power. Some thoughts I had were if you didn't retune the VVT that you might still have some power left there. either way seeing that torque curve be so flat from 3000 to 5000 just makes me want to stick this engine in some car.

[@deanstevenson6527]

Jonathan; no 3.3 to 4.3 liter six cylinder engine responds to long tubes untill it goes well over 300 hp.

[@flexall7408]

The head is engineered for emissions with small exhaust ports, just like the tuppy jeep head. Thankfully that head looks real meaty and will most likely take a nice porting.

[@jonathan7744]

@@deanstevenson6527 I've seen 3L engines respond to headers, or stay the same. I actually was thinking it would loose torque and gain 1-2 hp top end. But like Flexall said the exhaust ports a very small on the 4200 so it makes sense that even if you run with a nice header with larger primaries the head is the limiting flow. I'd be curious to see the stock vs long tube after the head is ported to see how much it changes then.

[@deanstevenson6527]

@@jonathan7744 : Flow velocity On Holdens 3.3 liter XT5/XT6 EFI and Triple SU engines, long tubes rob torque and power unless they are interference matched. Old 1969 GTR or 186S twin branch iron headers from a 125 or 135 hp 2bbl engine fill out the toque and power curve best as the cam timing goes upwards. On 4 liter Falcons, headers hurt mid range torque in some situations. It's all about optimum flow velocity. Going too big in tube diameter and length hurts lb-ft and peak hp. You have to find the right tube size, length and groupings by long sessions on the dyno as cam durations go up. On a 4V per cylinder engine, extra cam timing and lift can kill the need for additional diameter and length. It's very inter-related. When it's turboed though, that header will be PURRFECT!

[@jonathan7744]

@@deanstevenson6527 yeah I don't mess with american engines that much so I had no clue.

[@emanueltorres4093]

I am one the people that can't wait to see the 3800 on the dyno. Last time I seen one is here on KZbin on an Australian channel it was a single turbo I think it was like 450whp although he claimed he has made 500+whp on a previous 3800 engine I believe it was on a series 2 3800 and his friend pushed like 400whp on supercharged one. inspired me to want to modify my 3800. Sleeper. Hahaha.

[@coreyfreedom9859]

Check out nugget garage

[@ralexander9495]

Awesome. Thanks! Request: GM 4.3 EcoTec LV3

[@shadowopsairman1583]

Do a L35,LU3, LV3

[@slicktop2jz855]

Aussie here. Looking at 3x barras as we speak 👍 all for under $400 each

[@nunyabidniz2868]

Isn't that just about the scrap value for the aluminum alone? Hard to beat that deal!...

[@sandwafle8091]

Are you still going to be doing the big bang coyote video?

[@andycrips]

I cannot believe how flat that torque curve is.

[@alexporter7979]

I'm curious if the exhaust valve timing has something to do with the lack of NA improvement from the header. Wonder if a gain would be seen if the valve timing was advanced back to the baseline, and then comparing manifold vs header.

[@Project-gr6zy]

After this do a twin turbocharged ford 300 i6 with sequential injection

[@blownaway4371]

SO MANY ENGINES, so little time lol.. RIchard, what's the best all-round 4200 to start with? (year/model) Is there a 'better' head/year? How about some ITB's?? (pain to sync though) Talk to Endyne to see if they'd CnC port a head for you (aero-space quality!!)

[@rotaxtwin]

That is a nicely fabbed header, I too am surprised it didn't like it. How does the VVT work, is it mechanical off oil pressure or weights or electronic? No doubt it will be a beast on boost and of course great to see something different.

[@richardholdener1727]

THE CAM IS ROTATED USING OIL PRESSURE

[@andyharman3022]

Needs more cam. 4 valve per cylinder engine, and the power is falling off before 6000 rpm. I bet it would really wake up with longer duration cams. Torque per displacement is a little disappointing. Only 1.15 lb*ft / cubic inch. That small exhaust port must be holding it back.

[@enermaxstephens1051]

So what's the consensus... maybe you can squeeze out another 8 hp with a good tune? If you subtract the lab conditions, this session didn't make much power. Just very close to factory.

[@johnpublic168]

Great torque curve

[@Fieldzy14]

Awesome, very cool engine.

[@allenl9031]

Richard, is this Atlas using the standard SBC bellhousing pattern? If so, here's a swap for you, Atlas 4.2 replacing the Jaguar V12 in an older XJ, or XJS. They used Turbohydramatics and later 4L80E transmissions. An alternative to the common SBC swap. 😁

[@richardholdener1727]

THE BELL HOUSING IS DIFFERENT

[@mfree80286]

@@richardholdener1727 Worse, it's unique.

[@evanmolnar1351]

Hey Rich, Do you know the combustion chamber size is on the 4200? I'm trying to figure this out and haven't found anything on forums, or even on the official technical document by GM on the 4200's specs... Thank you

[@richardholdener1727]

I'LL HAVE TO MEASURE IT

[@michaeldelaney7271]

Love the testing and the interesting choices. But what the heck does Ameri-Barra mean? And, sometimes the audio is a little iffy.

[@richardholdener1727]

Tha Barra is the Aussies 4.0L 6-cylinder-this is nickname given to the 4200 Atlas the American Version of that motor

[@michaeldelaney7271]

@@richardholdener1727 Thanks a lot. Please keep putting up the interesting videos. They are great fun. Maybe a Pontiac SOHC Six someday?

[@p0intdk]

Cant wait for you put some BOOST on this, 30PSi and 900 should be np right? :D

[@jimkillen1065]

I was thinking after you changed from the manifold to the header did you try to change the exhaust cam timing to see if that will impact this torque and hp

[@alexhise968]

Really be nice if you could set up VVT on both cams

[@jasonschagt640]

Sweet video. Need to find the 2.4L motor out of the dodge avenger and tryin make power with it

[@richardholdener1727]

THE PT CRUISER TURBO MOTOR?

[@jasonschagt640]

@@richardholdener1727 no, its the one newer than that.

[@mfree80286]

@@richardholdener1727 He means either the GEMA World engine or the Tigershark, which is GEMA with Multair. It's also a Mitsu 4B1 and a Hyundai Theta though they all bent some details around.

[@AnDrEw122100]

I think this engine in a 3rd gen camaro with a turbo would be super cool.

[@shawnahartzog1799]

I believe these motors are tuned about as high in HP as they can go with the parts they have stock just add boost is about all you can do

[@noneyabizz8056]

Richard Holdener, what would happen if you jump the exhaust cam timing at the chain too?

[@tomcelica]

Pistons would hit the valves probably lol

[@joeanderson1616]

Of course that flared-inlet tube is going to give more power than just a naked TB as the tube provides directed airflow and increased velocity to the TB. I wouldn't call it a true CAI, though. That's a bit misleading. A real comparison between the stock airbox and an aftermarket CAI would be interesting.

[@Dr_Reason]

A header might work if it was 3 by 2 where you pair the front cylinders and the rear into separate collectors and then use a 2 into one further down stream.Still a cool look for the turbo.

[@2lotusman851]

You mean the classic straight six performance exhaust? Thats what I thought too. The cam timing might be too mild to take advantage of that. Don't know...

[@jamesford2942]

How much smoke did you make with that roll over engine. I have started a couple engines after roll over and they really smoke for a while.

[@dilsher12]

Excited to see how much power it'll make before going boom

[@PetrolHeadMike]

I think it will do 600ish before uncle Rodney comes knocking 😂

[@richardholdener1727]

THINK MORE

[@mfree80286]

@@richardholdener1727 This was from the period when GM's inline engine-eers had just finished crafting the new US Ecotec out of the Opel Family II engine... and given the LSJ and all the people who proclaim a stock 2.2 can be boosted to 400hp without issue, they learned a few things. You probably don't recall a while back you were looking for odd engines and I mentioned the Daewoo Leganza 2.2, well, that's an Opel Family II engine. I have some machine drawings from a dealership manual, and that thing was built rather stoutly for a sedan engine (even one that redlined at something like 7500 rpm). Crossbolted mains, stud girdle, windage tray, structural oil pan, etc. Yeah, I'm willing to bet you get just shy of a thousand horses out of that 4200 before something pops, and if it does it's probably a head gasket.

[@tiitsaul9036]

It’s exciting to see something different on the dyno. So where does the valve timing make a difference? Between idle and 2000 rpm?

[@richardholdener1727]

DID YOU WATCH THE VIDEO? THE VVT ADDED POWER THROUGH THE WHOLE CIRVE

[@tiitsaul9036]

Richard Holdener ok. I think now I get it. I wish you run cam timing in both extremes to see where the crossover point is.