The Perfect Engine?

Chryslers post war engineering team was manned by some of the most brilliant minds the automotive industry has ever known.
The little 170 Slant Six was loved by all, while it's big brother, the 225 was seen as a mistake and poor compromise of componentry to make the bean counters happy.
#slantsix #mopar #miata
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[@CoconutBlitz]

Did the same startup to a 1969 383 and 727 combo I found. We put it on the garage floor and poured gas in the carb and my large Itialian friend sat on the 727 and rode that for a good 30 seconds with open manifolds as the motor roared. It scared the neighbors and made all the neighborhood dogs bark. Good times.

[@greeceuranusputin]

It's even better without exhaust manifolds, you can see flames coming out of the ports.

[@jtuck6065]

If nothing else, UTG is quality, clean, entertaining content. Love the creativity of the videos. Very unique and unlike anything else I’ve viewed this far.

[@mwilliamshs]

Clean? He's often vulgar

[@whiplash-wl8764]

ngl I really wanna buy an old 50s-80s beater just to tinker with now

[@rexdrabble4988]

@@mwilliamshs Dont watch him then

[@mwilliamshs]

@@rexdrabble4988 not complaining just stating

[@kramnull8962]

@@mwilliamshs Go back and hide under your mother's dress...

[@agenericaccount3935]

Interfering with something engineers love, and making them change it for cost or whatnot, tends to create a lot of righteous anger from said engineers.

[@EngineeringVignettes]

Amen.

[@Plumcraziness]

This car is going to piss off so many different people and I love it. lol :) One of the coolest and more unique builds on KZbin right now IMO. Keep up the great work, Tony! 👍

[@MikeBrown-ii3pt]

In case you haven't seen the comments on the other Miata videos, it already is pissing people off! I love it and can't wait for the car to be running and driving!

[@jeremypike9153]

When he got the miata he asked everyone in the comments what he should do with it a lot of people including myself said put the leaning tower of power in it.

[@MikeBrown-ii3pt]

I really enjoy reading the comments posted by the haters and know it alls on the Miata. They obviously don't see all the engineering that's going on. They also probably buy everything that goes on their cars and, quite possibly, pay someone else to build for them. Sure, I've seen a few things that I would've done differently than Tony on this project but, it's not my project. I'll just enjoy the videos and most likely pick up a few ideas in the process.

[@jeremypike9153]

@@frenchonion4595 I don't think he believes it will be superior he's just looking at the miata as a good platform for him to test the 170 slant. He has mentioned he's tried to move the motor down and back as much as possible which is exactly what you want in a road race or grand touring car. Tony is a smart guy he is doing everything he can to make the miata a viable road race car. The slant six is flat out known for its reliability period. I dont know how old you are but the reliability of the slant six may pre-date your knowledge.

[@Zephyrmec]

That’s crazy with the Miata purists! They are high production “paper cups” use it, toss it, grab another. They are great little fun cars! I don’t remember people bitching when Ford owned over 50% of Toyo Kogo Heavy Industries and the popular thing was slipping a 302 Into a Miata and making a sports beast, or the Pontiac crew crying about V8 Archie and his SBC Fieros (he is still cranking them out) but when you use a Slant, the world is coming to an end..... either they have a hardon for US Chrysler products, got a problem with mix and match manufacturers, or they are not fabricators, they are bolt together or hire it done guys....... or all the above!

[@tulatoiletandsepticllc81]

Anybody can play with common stuff. A true lover of mechanicals learns to love the obscure.

[@ThePaulv12]

Quite true that! Thing is though, then all the morons come out with the attitude that if they don't think the obscure is any good then no one else needs it either. Imagination plays a big bloody part. Just think of the imagination of those that designed the 1.5 litre supercharged V16 BRM of the early 1950s that made 600hp @12,5000RPM. Listen to this: kzbin.info/www/bejne/nIuwgXd5g96Erqc

[@pauljohnson5116]

Hell yeah I'm running a 273 vs a 318 was a slant 170 but i love me some oddball engines

[@Arthagnou]

The polyhead would be obscure but capable of making power, the slant 6 is neither....

[@ThePaulv12]

@@Arthagnou I've had a great deal to do with Slants and I'm hearin' ya LOL.

[@bradlawson8678]

Not even a whisp of smoke!!! Outstanding!!

[@duranbailiff5337]

As a Boomer, I grew up with inline sixes all around me- they just seem right. Over the years the I6 engines have become much less known, but to my old eyes they are perfect. Semi-trucks, tractors, Triumphs and everything else, the look, sounds and smoothness make the I6 my favorite! Great job Tony!👏🏼

[@datasailor8132]

Even Mercedes is going back to the inline six. From about 1996 to 2018 or thereabouts they played around with V6s. Recently they have introduced a new 3.0 liter inline six with both exhaust and electric turbochargers, a starter/alternator/21hp-169lbft electric motor between the flex plate and the torque converter. There are no belts on the front of the engine whatsoever. Go check it out the Mercedes Benz M256 engine.

[@dennish6987]

Inline 6’s are very underrated.. although they recently have found a small healthy following ... a turbo boosted I6 can provide unrivalled power and handling that can easily be overlooked .. but that v8 sound and brute power is too addicting many forget the I6 greatness

[@rajrammbbs]

Damn smooth . Quiet too with no muffler.

[@TomH112]

Straight sixes are absolutely my favourite engine. Lovely note out of that 170

[@MrRShoaf]

I'm thinking before installing the engine perhaps seals and gaskets might be wise and perhaps a compression test, thermostat and maybe a water pump. Inspecting the brushes and bearings on the starter. All of the things that are cheap and easy to do with the engine out that are going to be a pain after you shoe horn it in.

[@chasmontecarlo7271]

Hi uncle tony i like the way you think and your old school ways and what you do on your cars 🚘. I guess it’s because I’am a old school 72 year old guy that likes old cars back in the day thank you for your knowledge 👍🔧

[@johnmcdonald587]

I never gave the 170 much thought until now. I think I need one now. The little sucker revs really decently.

[@replica4132]

it sounds so happy to be alive, gonna be dope when it is in the car

[@whiplash-wl8764]

classic motors have so much character in em I love it

[@gordross4726]

Uncle Tony; I'm 72 years old so I loved seeing you in a rocking chair! LOL Great channel.

[@HarleyHawk1]

Plenty of research was done when I bought a rotary powered RX-7. It was a whole new world. Mazda loved making the rotary work. They fought for years to get a design that would be somewhat reliable and durable. They took it on with the mentality of the samurai. Very cool history. Those engineers loved the exotic nature of the rotary engine.

[@livewire2759]

I know a guy who took an RX-7 with a junk rotary engine and replaced it with a 327 chevy. He said it didn't handle worth a crap and couldn't even go in a straight line 'cause the rear end couldn't stay planted for nothing! I told him he should sell the 327 to me and put a rotary back in that thing. ;)

[@HarleyHawk1]

@@livewire2759 I agree, the RX7 belongs with a rotary. I've seen the V8 swaps before and some other Japanese 6 cylinders and 4 cylinders. Much like Tony's Miata, the balance comes from having the rotary engine seated behind the front axle. It's considered a front midship engine placement.

[@CharlieBrown-pb9xn]

@@HarleyHawk1 I checked over one my sis got way back. It was bad ass till she wrecked it. That car could make a u turn with tires in smoke.

[@HarleyHawk1]

@@CharlieBrown-pb9xn That's cool, in Japan the RX7 was a macho car but state side here it sold well with the women. I guess they thought it was cute, men wanted V8s haha. Lots of Japanese cars had feminine names, which was very popular in Japanese culture. Hence why when they brought them stateside, they gave them letters like Z,X,R.

[@charlesprice7608]

My mom bought a brand new Mazda RX4 in 1977 it was basically a RX7 with a 4 door sedan body on it. I have only seen one other car in my life like it. People couldn’t believe how quick that little car was, I mean think about the 4cylinder cars from that era.

[@morgangallowglass8668]

Our Uncle Tony shares his inner James May with us!

[@baby-sharkgto4902]

She sounds good Tony! I like The Cowboy, he seems eager to help. I appreciate that.

[@manicmechanic448]

You next Miata should have a Pontiac half eight. Micky Thompson built one. It was literally half of a 389, and almost everything was interchangeable.

[@markvires4844]

I am a huge fan of the slant 6. Not a powerhouse,but,an anvil of a mechanical masterpiece

[@r.a.monigold9789]

I'm 74 and former ASE. Now? A KZbin nit picker. Gotta say I'm smiling. A slant six into a Miata? You just upped the reputations of both engine and car with this one swap!! Oh, and you've answered the age old question - what to do with a Miata after it's gone out of style (I know, step one yank the power train and plant flowers. I'm talking step TWO). Thanks for letting us watch - THIS is fun! BTW - I've been a subscriber since the seventh time I watched, GOOD STUFF

[@campesinoplastic6169]

Parts:$162.89. cigarettes and coffee: $591.72

[@scottyp.5243]

Tony my first comments on your channel on KZbin... I have a 71 Torino cobra 429 Cobra Jet.. not a Mopar..but we love everything you guys do!!

[@Impactjunky]

I got kicked out of a "classic car" discord channel for sharing vids on this project and defending it. Turns out one of the moderators was an import guy and an "engineering student" who's never actually built a car before and he was seriously triggered by this build.

[@livewire2759]

LOL That's hilarious.

[@timsacco6g694]

Man, really? What about assholes who put 2JZ (I think that's what they call them!) In Camaros and Mustangs?, the stupid Fast and Furious Toykyo drift movie comes to mind! Also there was some dude who put one in a 68 Camaro a few years back in Hotrod magazine, are you fucking kidding me? NO FOREIGN ENGINE, I DON'T CARE IF IT MAKES 2,000 HP BELONGS IN A AMERICAN CAR!!!

[@THRASHMETALFUNRIFFS]

@@timsacco6g694 Thank you sir... /w\METAL/w\

[@duranbailiff5337]

Tim Sacco6g- You should check out the young man in Japan that threw away the junk motor that failed in his Rolls Royce. He had a built 2JZ put in and despite the weight the I6 makes that Rolls scream! Hate all you want- there is no car too good for the venerable 2JZ!😎

[@wheels-n-tires1846]

@@livewire2759 Exactly my thoughts!!!

[@davidsanstad9846]

It's not appreciated enough when a creative mind and patience can run together successfully! Dare to be different!!!

[@Mike-xt2ot]

The slant six has a sound all its own. No other manufacturers straight 6 sounds like a leaning tower of power!!

[@justaguy2738]

It’s awesome to see someone known for crazy race cars and dragsters so in love with an economy engine😂 . Keep up the good work uncle Tony!

[@victormiranda9163]

If you get enough power at 7000 rpm for as many hours as you want, it is a great engine and the only economy is that you don't need to buy another engine. an aircooled bug engine will need to be replaced...

[@Beandiptheredneck]

An American economy engine in a Japanese sports car nonetheless 😅

[@HexxHenderson]

I have a 1965 Dart 225 slant six automatic that I bought a couple of years ago outside of Barstow California it had been sitting in the desert behind a guys house for 30 years I replaced all the necessary stuff on it fuel pump radiator starter water pump etc. I did the brakes change the oil poured gas in the tank fired it up and drove it 84 miles back to my home in Los Angeles it was 111° out it ran like a champ! I have a love for these sixes that go back to when my dad bought a 71 Valiant brand new when I was 12 years old and we drove it from Denver Colorado to Disneyland two years in a row and then on out to Philadelphia for the Bicentennial in 1976 and it never missed a beat what an awesome car.

[@sdolsay]

I had a neighbor who had his own one car taxi company when I was a teen. He used a 1968 4-door Dart as his cab. When I moved it was still going strong with 250,000 miles on it.

[@johnfunk4313]

I wish I had these videos as reference when I had my old Dart. It makes me want to get another one.

[@eugenepolan1750]

I always heard that the engineers wanted the engine upright and the body to be slanted, but the stylists carried more weight with the corporate heads.

[@wheels-n-tires1846]

😂🤣😂🤣😂

[@dwiggle6517]

Steve Dulcich built a slant 6 they tested on an episode of engine masters. It made like 350 ish hp.

[@2lotusman851]

if you look at the port flow (145 CFM stock) , that might be about it, too. Head seems mediocre.

[@Sedan57Chevy]

What a unique exhaust note, for a very unique engine. Tony might just rewrite the Slant Six history with this 170...I really can't wait to see where it goes!

[@alanmerritt860]

Yay. I guess I have the perfect engine too. I have a 170 in my 63 Dart. Runs so smooth.

[@modelnutty6503]

sounds pretty healthy! my bad math says 170 cubes = 2792 cc's or 2.8 liter. the Miata will be a really fun little beast with the right gearbox.

[@jamesdevore3022]

UTG and catching up on Vice Grip Garage.... Ahhh life is good.

[@THRASHMETALFUNRIFFS]

is there a new vidjya cuz I got no bleep bloop for him?

[@donaldfrederick1557]

Can't hold a candle to Tony

[@frankieelder3210]

Vgrip garage does too much Chevy shit for me.......mopar or no car.

[@jaredphillips2423]

@@frankieelder3210 maybe if mopars didnt cost so much for no reason, he would probably do more.

[@frankieelder3210]

Jared Phillips I doubt it dude he is a chevvy man😜

[@k5wxp22]

Was talking to my neighbor the other day, and he had a 170 in an old Valiant. Said it was one of the smoothest running engines he ever had, and got well over 200k miles on it!

[@Sludge73]

That engine firing up and running so nice brought a big smile to my face! I had no doubts but damn, not bad! Thanks, UT.

[@STAY-GOLD-VINYL]

Tony I like your real gear head mindset. Tinkering with a engine that others overlook. Turn it UP!!

[@kingerikthegreatest.ofall.7860]

The rocking chair of knowledge.

[@Charon-5582]

Its like Indy's chair of wisdom!

[@dougsmaintenanceshop5868]

Tony: My Great Uncle, who just passed today due to Covid-19, spent the better part of his life career at Chrysler here in Detroit, first as a toolmaker, then die maker, then engineer. He once said that the Slant 6 was basically a copy of half of an early Jaguar V12. The Jag V12 supposedly ran so smooth it impressed the hell out of the design team and basically they designed the Slant 6 with that in mind.

[@robbiebob6267]

Hi Doug... My condolences for your great uncle passing & thanks so much for sharing your uncle's background & knowledge... Ideas from a V12 jag engine... Who would have thought... 🇦🇺😉

[@2lotusman851]

😂 You dont believe that, do you?

[@dougsmaintenanceshop5868]

@@2lotusman851 it's no secret the Big 3 and other auto manufacturers reverse engineer the other's technology. It's an old engine from an old platform, I wasn't around when it was designed, but, it would not surprise me. Feel free to ask my Uncle.

[@phillipleeds296]

Smooth as silk.

[@tonywhitaker8146]

I have a irrational love for the Ford 300 six. So, I understand. Not the most powerful, but durable and easy to work on.

[@MrTheHillfolk]

I love em for industrial stuff. I still see em all the time on generators. Along with the unloved 2.3 , which is another great industrial engine. The industrial 460 turbo is pretty badass , considering it's early 80s tech stuff it puts out 160hp at 1800 on propane. Not too shabby if ya ask me.

[@bwyseymail]

@@DanEBoyd Didya miss @1800 rpm?

[@MrTheHillfolk]

@@DanEBoyd The 2.3 from the old pinto days. Best thing that came from that car. Only 160hp from a turboed 460? Yes , because that's rated at 1800 rpm , basically idling. Having 160hp at 1800 is pretty stout if you think about it. We don't rev generators much over 1800 rpm, unless it's a small air cooled and they run 3600. Even then most equipment won't be running over 2100 or so. They don't give any other ratings I've seen for the 460 other then 1800. I do know it's got forged Pistons and crank , and those Pistons are like 7 or maybe 8:1 compression ratio. They built a true turbo engine that never saw the street, just industrial only.

[@MrTheHillfolk]

@@DanEBoyd hehe , I had my hands on a 240 a few months ago. At the Hitchcock estate, upstate NY, where Timothy Leary lived in the late sixties tripping his balls off on LSD. It's an onan gen that was installed around 64-65 or so. Haha it didn't start , because it sits alot. Cleaned the points quick with a half-ass piece of sandpaper and got it running during an outage , came back at a better time and did a correct ignition tune up.

[@MrTheHillfolk]

@@DanEBoyd I'd have to hunt for it , but I know I got a pic of the engine tag on my work phone probably.

[@biastv1234]

Yet in Australia, we got single barrel and two barrel 225’s, and are very highly regarded.

[@Dakattack98]

I love the slant 6 ever since I was a kid. My mom had a 76 four-door valiant that we just drove the wheels off of. So now I think instead of trying to build a 225 I want to mess with a 170 as well.

[@pdxbohica]

My parents bought a 1960 Valiant 170 and my brother flogged the crap out of it. Never a problem. Used to rat race a friend that had a Corvair and always won. The Corvair never flipped either. I then got to flog the crap out of their 1962 318 Fury. Fun times.

[@feeble1]

I suppose that just about all less knowledgeable people like me have marveled at what Tony has done so far with Bottle Rocket. I had no idea that you could build such a hot performer without throwing buckets of cash at the engine. Wow. And now the slant-6 170 project might end up being the coolest build I've ever seen. The whole idea of it is great, putting it into a Miata just because it's a cool thing to do is the cherry on the sundae. Who doesn't want to see what this 170 can do? And to see Tony so obviously enthusiastic and happy to be taking on this project, the enthusiasm is contagious and every day I keep checking for the next installment. I can't help but smile right along with Tony.

[@Ben-Wah]

Agree 100% with your modus operandi of digging into the history and if possible talking to the original engineers. This kind of insight has helped me with restoring old electronics more than anything! You can't know where you're going until you know where you have been.

[@williamgregory6684]

My next and last car hopefully will be a 60-62 Lancer or Valiant preferably with a 170 slant 6.Thanks for the info on the 170.My cousin Jill had a 4 door 170 hyper pack and it would scream down the back roads of Callands,Va before there were zip codes!!

[@paulalvaro6313]

In Australia, the vf valiant pacer ran a factory modified slant 6 for the biggest race of the country, the Hardie ferodo 500 mile race in Bathurst. That model car is a rare collectible here.

[@RudeMoparDude]

Nothing like the purr of a slant 6! 🤘🏼🔧

[@dongeorge4037]

I'm a "road care" slant 6 guy but always 225 automatics (the dealership told Dad he needed the bigger engine for our hills in NW Arkansas back in '63). But now you've got me interested in the 170 with a 4 speed.

[@dole8001]

Inline sixes were always reliable. The GM, Chrysler, and Ford inline sixes were all great.

[@rustyachers2459]

I have 2 170 powered cars a 1964 and 1968 valiant these cars will be running when my grandkids are gone!

[@THRASHMETALFUNRIFFS]

UR Punk Rock bro!

[@zztechs]

Always been a fan of the Slant 6, glad to see that its finally getting some love... even if its 30 years past due....

[@purestress2597]

Just realized you're doing what they did with the gen 1 corvette. You have a beautiful way of letting everyone realize that on their own.

[@wheels-n-tires1846]

Awesome... I had the same happy moment recently. The 170 in the Dart has been sitting for at least 15yrs. Initially I was dissappointed that it wasnt a 225 when i got the car, but youve made me rethink that!! Some fresh points, cap, rotor, wires n plugs, and a lil carb fiddling brought it back to life. I fact it fired so quick, I didnt expect it and it scared me haha!! Seems some rings were stuck and it smoked like a freight train, but by the time it got up to temp, it was running great!! Has a ratty exhaust system so was a lil loud, but its interesting how the 170 exhaust note sounds impossibly hot-rodish, almost like it has a hot cam, even though, of course, it doesnt!!! I envision a 5.7 carbed Hemi for the Dart, but itll be a driver project with the six for a while. Hoping to drive it around the yard once the new fuel tank goes in soon. Watching Tony with his sixes sure makes me want to tinker with that 170 a bit though...!!!

[@maddkraut03]

best running junkyard motor i ever heard! Outstanding!

[@crazycoffee]

Hey Uncle Tony. Have you ever made exhaust manifolds? If so have you thought about making a video? Keep it up. I cant stop watching your stuff. So much info.

[@THRASHMETALFUNRIFFS]

You mean like Tony making and smelting sand cast mouldings himself or you mean like cutting and welding some tube headers from a flange and some bends?

[@crazycoffee]

@@THRASHMETALFUNRIFFS Cutting and welding pipes. I know theyre called headers idk why i didny say that

[@THRASHMETALFUNRIFFS]

@@crazycoffee Ahh, cool, ok!

[@doctorromex7804]

I just pondered which you tube channels I watched the most and UTG came out on top.......

[@doctorromex7804]

@@DanEBoyd That's the longer version of what I was meaning. Although I subscribe to other channels none of them put up daily like Uncle T

[@edfrawley4356]

A high school mate in the 70's ran a Valiant with the Leaning tower of Power. When he bragged about how reliable it was we would tease him with "That's because it cant make enough power to hurt itself." I have never seen a slant in anything as light as a Miata but I'm betting that its going to be an impressive combination for what UT has planned for it.

[@THRASHMETALFUNRIFFS]

my bud in school in the early 90's had a 62 Lancer with Zolatone paint, it was an upgrade from the 72 Toyota Corona 3T-C but still wouldn't do a burnout unless we lifted on the rear for him

[@85superchris]

I've definitely found a new respect for the slant six 170. Sure I love powerful engines but I'm intrigued by reliable and indestructible ones almost more so. I grew up on American metal but fell in love with a Volvo that I inherited out of luck. It's no Chevy 350 but it will run one to it's grave. I've learned it's not uncommon for Volvo red block to throw down a million miles without being taken apart. Just properly cared for. I'd like to know if that 170 is a million mile motor. The perfect engine should. Thanks for doing something uncommon and being passionate about it. I can't wait to see the Miata go!

[@Levibetz]

I love these old school I6s! They usually sound kinda ratty without an exhaust, but that sounded great. Now I know you've got some beef with the engine masters guys, but they did a really interesting test with manifold temperatures and such, what they found was that what often is thought of as high inlet air temps from hot manifolds is actually the fuel in the carburetor being heated! Like in the float bowl. So it robs the fuel of it's charge cooling effect. All that is to say, the heat riser delete is a good mod, and tests have shown that. Granted you probably could achieve similar results using a phenolic spacer, but welding can be free, spacers cost money lol.

[@tyrssen1]

Oh Yeah! Always liked the slant six, and this is gonna just be way too cool. Thanks UT!

[@robbiebob6267]

Tony... That's a sweet running 170 slant & I can't wait to see you do a rebuild & see how that goes... Love your style Here in Australia we only have the 225... Well.. When chrysler was manufacturing here anyway 🇦🇺

[@THRASHMETALFUNRIFFS]

Just swap over the head and the cam onto the stock block you just took it off of, then mount the manifolds and stuff back on and you'll still have a fine 225 slant 6!

[@robbiebob6267]

@@ChrisSmith-nw7be cool!... Have you got plans for the 170 like a full reco?.

[@ohnoitisnt]

Okay now im excited for the miata build. Its going to be hilarious

[@paintnamer6403]

Engineer- "So many things wrong with it I can't remember" Well that's the stuff we want to know!

[@jamesmarze9850]

I look forward to your videos every day you have a vast wealth of wisdom that continues to inspire all of us, thank you tony

[@artjones2498]

i ran across a artical awhile back from the engineers...the said with a split exhanst manifold 2 into 1 exhaust 21/4" pipe single exhaust a recurved distributor and a good induction system...the 4bbl. set up......that the 170 is 1 of the best engines chrysler ever made

[@martinnicholas9867]

Tony.Your on to somthing good .Can't wait to see the miata running with a real engine.

[@jeremypike9153]

I want to see a high rpm N/A 170. I think that would be the most fun in a miata. Choppy idle and comes into the power band around 3500-4000 rpm. Sit down and rework the cylinder head too port the intake and exhaust and fit some bigger valves into it.

[@livewire2759]

You see? There is method to his madness. As a Corvette guy (Corvettes originally used straight 6 engines) I can totally relate to his slant 6 obsession, especially now knowing it was designed to be a road course racing engine for competing with european cars... JUST LIKE THE CORVETTE! I still would have put the slant 6 in an american car, but I don't think Chrysler ever made a little two door, two seater back then... did they?

[@80spodcastchannel]

that 170 even sounds badass... NICE!!!!

[@unclemarksdiyauto]

So simply! Start it right on the floor! Now a days, stuff is so complex! We had lots of dodge & Plymouth 6 cyls in the 1970's. Old family freind had a 74 dart 4dr with 6cyl that burnt a exhaust valve. I went down to either the dodge dealer, or a auto parts store & bought the one valve & gaskets and lapped in the valve and had it running like new for her! (Pretty good for a 16 year old kid at the time) So easy to work on!

[@samuelsamsonian5832]

I too researched the slant six and learned of the engineers praise. I wondered if I could buy the rights to that ancient design and make them again. I would probably test aluminum block and heads since tech has come so far. That 170 with less weight would be amazing. Maybe a diesel version...

[@carolhamilton7325]

Glen Hamilton. Hi Uncle Tony. Many years ago, back in the 70s I had a 1961 Valiant with a 225 re bored and a three speed push button transmission. That car would spin the tires for at least 50 feet. Car was rough but you could not kill that motor. To this day I don't recall having so much fun with a 100 dollar car! Glen from Ontario CANADA.

[@THRASHMETALFUNRIFFS]

Whoa duuuuude!!!! 50 FEET!!! Right-On!

[@AllenSymonds]

Uncle Tony is the "Guru" of 170 slant six

[@charlesangell_bulmtl]

Saying that, I think you disrespect the Original Engineers. Tony's only beginning with what % of that understanding? Guru? psshh sounds like lame gas dude... OR ASS L-----G. And I'm NOT disrespecting UT....He does seek answers and that bears my FULL RESPECT I do like your channel content SUBSCRIBED

[@duranbailiff5337]

Charles Angell- The original engineers and developers are long gone Brother. Maybe UT is the Guru of 170 S/6 of our current day?🤔

[@r1lark]

Engine sounds great! Quietest unmuffled engine I ever heard. But keeping the auto trans? I guess I understand why, don't have to worry about clutch linkage then. Man, I still thought you would use a manual in it! It is a sporty car, after all - it deserves a manual.

[@harrys.3165]

Uncle Tony ,you are the best and I never knew they made a 170 slant as I had a few 225 slants Kind regards from South Australia .

[@aprules2]

Is it me or is it just a ton of fun test firing an engine on the ground. It's interesting how much torque that little 170 has though. I fired a 302 on the ground about 6 months ago and when I was revving it, it barely even moved on the ground.

[@slant6guy]

That 170 SLANT\6 is beautiful sounding! The 225 that I had never sounded like that or ran as smooth.

[@hogsandsooners]

This has me curious about the possibility of using a 170 in a ‘77-‘84 Mazda pickup. They have long been my favorite mini-truck and I have always had a strong affinity for anything MOPAR. Might be a fun project and would actually provide more than adequate power. Time to scour marketplace, it seems. This is such a great series. Thank you so much for bringing this to us.

[@rfortier1615]

Tony’s lil squeeze bottle of gas on the shop floor.😂

[@momoloo141]

Love it. The six cylinder engines are really underappreciated. I had a 68 mustang with the 200cui and it was also a great combination. Unbreakable engine with ok gas mileage. The only downside of your videos is that you give them to much publicity, so it will get tougher to get them. But hey, you are damn right, so keep going, I will keep watching...

[@creativerecycling]

The only other engine I would consider swapping in there would be a Buick/Olds 215, but I haven’t seen one in several years.

[@stephenkeebler732]

A guy up the street from me had one in a Nash Metro: anything above idle practically pulled a wheelie...

[@francfurian8215]

I’m loving this build Uncle Tony. They were everywhere here in Australia & I’ve always had a thing for them. Cheers & stay safe guys😊

[@garylewis3641]

That's the first time I've seen an engine run on a garage floor, pretty neat!

[@thisisyourcaptainspeaking2259]

I prefer to start and run every engine before installing them to make sure there's no obvious problems. In some cases, it's just too difficult.

[@garylewis3641]

@@thisisyourcaptainspeaking2259 I guess it makes sense when you can do it!

[@lgude]

The idea of a 'perfect engine' being the 170, reminds me that in Australia General Motors Holden started in 1948 with the inline 6 135 'Gray motor' based on a pre war Buick design. In 1964 they came out with the inline 6 Red Motor which was a completely new design. Holdens were the car to own in Australia - well ahead of Ford and Chrysler. And if GMH produced a 'perfect' 6 it would have been during the Red Motor era, which parallels the Slant 6 era in a country where in line 6s were much more important than in the US. In terms of CID it evolved as follows (Wikipedia) 130 cubic inches (2,130 cc) 138 cubic inches (2,262 cc) 149 cubic inches (2,447 cc) 161 cubic inches (2,639 cc) 173 cubic inches (2,835 cc) 179 cubic inches (2,940 cc) 186 cubic inches (3,049 cc) 202 cubic inches (3,298 cc). I'm an American who moved to Australia in 1976 and I have no experience based opinion of which was the best - the closest to perfect. I defer to my Australian friends who know these engines inside out. I owned a 173 for some time and would not put it forward particularly even though it is closest to the Slant 6 in CID. I can say that among Australians in the 70s and 80s I most often heard the 186 put forward as the best of the lot, with the 202 as being 'too heavy on juice' - ie not economical on fuel. In Australian Fords by far the most developed engine would be the more recent cross flow 250 CID which, with an alloy head, ruled the Australian Taxi market until very recently. Perfected, perhaps more than perfect. The earlier pre cross flow 250 Ford cid engines were solid performers and had early 170 and 200 variants. I've owned several of them and found them completely trustworthy in the bush - even when badly worn you could keep them chugging with spare ignition parts and good supply of oil. The slant 6 also has a history in Australia, and received a fair amount of 'go fast' attention because of the importance of in line 6 motors here. So there would be plenty of opinion and solid knowledge about all the in line sixes here in Australia way beyond my experience. Come on Aussies - edjumicate Tony.

[@timsmith854]

Tony, I hope that you are aware of the history of Chrysler in Australia? We started off building cars that were basically copies of American A-body cars. Then in 1971, we designed our very own straight-six engine with hemispherical combustion chambers. It came in three sizes: 215, 245, and 265. The next model, released in 1972 was a totally Australian-designed body. We made a 2-door version - our Charger. You could buy it with a 318, but the R/T version had the 265 engine with triple webbers, revised cam, and factory headers. This gave it 300bhp and 0-60mph time of 6 seconds! I would love to be able to send you one of our "Hemi" straight sixes. You can get some serious power out of them and they are built Chrysler tough.

[@The_R-n-I_Guy]

The inline 6 cylinder is Europe's V8. I can't wait to see the Miata on the road/track

[@saxmusicmail]

Tony, on the transmission, replace the spring on the accumulator piston with a piece of electrical conduit cut to such a length so as to block it in position. And turn the line pressure adjustment screw fully clockwise. Voila! The Direct Connection shift kit!

[@terryburns8917]

I had a very nice sound to it. As I say each video I do absolutely love your Miata project.

[@allankwiatkowski9086]

wow it is amasing at how many people are on you about what you do.the 170 was of a similar thought as the 1930s volkswagen.so easy to work on long life,reliable,like why cant people just watch with out add two cents of theirs,watch and follow without judging and criticizing seems do be all a lot of people cant do that

[@creativerecycling]

Not even a puff of oil smoke when it woke up! It sounds very happy to be awake again. That little engine is gonna scream. Mazda, eat your heart out!

[@michaelferro897]

sounds hot! I didn't hear any diesel rattling lifters like the 225 usually has either, looks like you have yourself a hot little runner there, great stuff guys!!!! good luck with her!!! thanks again y'all!!!!

[@robertb3409]

I know the 1960 Plymouth XNR concept car had a 170 in it with 250hp. They took that concept car to over 150 miles with the slant 6. That engine will be great for autocross and it will make more than the Miata original engine.

[@gertv6777]

I bought a 360 magnum from a junkyard a few months ago and ran it on the floor just like you did with a Dr Pepper bottle for the gas source and cinder block to hold up the bell housing while I ran it

[@jamesblair9614]

Love it! It sounds great, and it sounds different than a 225 too.

[@petershinkfield4980]

We never got the 170 ci in Australia, only 225. 225 was pretty good compared to the other 6 cylinder engines by GM and Ford, but they did seize and throw rods out the side of the block when run low on oil. In 1970 the slant was dropped for the Hemi 6....the use of hemi was more of a marketing ploy than anything. This motor was originally going to be used in trucks and was partially developed by Chrysler USA and finished by a team of engineers in Australia. Original design was 245 ci and in 1971 they released a 265ci and then a 215ci sharing crank, rods, cam. The 215 was a low comp dog for government fleet cars. The 265 was the pick and quite strong, it has 318 pistons and lifters. The R/T 6 pack came with triple twin side draft webbers, high comp, cam etc and produced around 300 HP in top spec and the E49 option R/T charger (Aussie Charger) ran 14.2 quarter mile. The 265 was a better option than the 318 for economy and performance.

[@7spadefish7]

The part in that article about exhaust runner length is interesting.....I wonder what you could get out of one if you had no restrictions on intake and exhaust runner length.

[@gregoryfields4631]

my buddy had a dart with the 225 and it started running ruff we did a tune up but no improvment tore it down and found the crank broke in half but still running it was broke diagionaly through one of the mains. We where amazed.