The Legend of GM's MASSIVE 11.5L V12 Engine

[@Dustrunnersauto]

What do you want to see next? 👀

[@fordmuscleluis9710]

The History of the Ford E-Series Econoline Vans & Cutaway chassis also Isuzu 7.8 Duramax I would like to see those vids

[@tosijjaan]

Talk about the 22L V12 diesel used in the Soviet Кировец К-701

[@Khalilsafwan-vt9xq]

Hi Is the 2016 Toyota Highlander 3.5 fe engine the same as the 2010 Toyota Venza 3.5 engine?? Thank you

[@bryanst.martin7134]

Have you ever heard of Smokey Yunick's Adiabatic Engines? They were developed after his foray into hypertuning the 2.4 series Iron motors. Yin/Yang Pistons and combustion chambers. Great output. Then developed his own line of motors called Adiabatic. Meaning the exhaust temperature was close to intake temperatures. You could place your hand on the exhaust pipe at full power without leaving flesh. There was a turbo, the intake was inside the exhaust, and the air charge temperature at the valve 400deg f. He put a V2 (75 cu in) in the big 3's little cars. Escort, Chevette, K car, and I think VW was one too? The Chrysler guy drained the tank and put low grade fuel in and spent hours trying to get it to ping. Traffic leap from stop in 3rd gear. Grunt, grunt, gone! It produced 100 to 150 hp. A 225 cu in 3 cyl inline made over 260 HP and the V4 made 340hp and required no cooling system. Not air, not water, nothing. Amazing Man. The torque was impressive, and I realized they could replace semi truck motors, as the little motor RPM was high enough that a simple 2:1 RGB would adapt them readily. Omnifuel. No cooling system?

[@craigwhittingslow9689]

I would like to correct you on something. This series of engines does not have hydraulic lifters. Nice video though. Also a feature I don’t see anyone who talks about the v-6 version of these engines is that they have a separate journal on the crankshaft for each cylinder thus making it have a torque of a inline 6 cylinder engine in the v configuration. 🙏🙏👍💪

[@brianjohnsen5970]

I completely rebuilt and machined one of these back in 85, it was a great machine to be used for irrigation in Nebraska.

[@turbo8454]

The 637 used the bore/stroke of the 478 V6 (5.125" x 3.86"). The 351/702 bore/stroke was 4.56" x 3.58".

[@michaeladams2959]

I think I may have found a replacement engine for my 1965 Chevrolet C20 with a straight 6-292 fleet side.

[@the_car_guy5915]

​@michaeladams If you can find one lol. I hear there's only estimated to be a few thousand of them left.

[@Freighttrain-yd4fz]

You should do a video on the Detroit diesel v16 engine, that would be such an interesting video.

[@cameronjodoin309]

Screaming Jimmy

[@noneshere]

I was an engineer on GM 16/92's for many years. Huge engine, big as a car. They had super chargers & turbos on them.

[@NeedForSpeed.2004]

Is that the one in the Big Bud 747?

[@CBREngines]

​@@noneshereyou know that with a turbo only the 2stroke detriots wouldnt run. 2 stroke detriots couldnt suck air n/a nor would run. So all ALL 2 stroke d had super chargers and they didnt add power at all. Without it they wouldnt run. But it was a old method for turbo/super charger combo. So anyone thinking its new. Its not.

[@chuckgrenci6404]

And Cadillac had a V-16 in the early thirties; that might also be quite an interesting review.

[@GHG_513]

Was supposed to bring it back in the early 2000’s but never did. It was going in the caddy 16 ultra luxury car that never came.

[@brad3139]

got to see one of these in real life at a car show once. guy stuffed it into an old half ton and fitted a built 700R4 behind it. quite the engine, really something to behold.

[@patrickmcgoldrick8234]

It would be interesting to see how long the 700 would stand up behind the V-12.

[@michaelbenardo5695]

A 700R4? Not good for this engine.

[@RogerDema07]

I was just reading about this engine earlier today. The hot rod gods have given me the vision o.o'

[@stewartalbert3523]

Drove one of these in a 1960 GMC that had been stretched to haul a well drill rig . Gross weight about 60000 , drove from Ohio to Colorado . Good engine ! LOVED gas !!

[@robertrenner8880]

My old boss from my dealership days used to sell the V12 gas to the local lumber wholesale company. The mechanics there were sticklers for doing proper maintenance on the truck. I was told that almost every one of them lasted over a million miles.

[@americanrambler4972]

What about the massive Hall-Scott gasoline and benzine engines? I rode a school bus (Gillig, I think) to school every morning with one of those. It was very very smooth running and surprisingly quiet compared to the other busses. I enjoyed watching the driver double clutch while shifting the gears. I don’t think I ever heard him grind gears during a shift. It had a very smooth even exhaust sound at idle and a very smooth hum running down the road.

[@Sheisthedevilyouknowwho-ft9we]

I think anyone who has read about the Hall-Scott wishes we were around back then. Hall-Scott 1091 ci running on butane. in a fire truck, taking off, wide open, up a long steep hill going to a fire in the middle of the night, you could see 3 foot blue flames from the stacks said one guy on curbsideclassic 😊

[@Sheisthedevilyouknowwho-ft9we]

I've read old mechanics who said 200,000 miles, they'd throw the heads in the dirt, put on new heads, good for another 200,000 miles. That's very good for an engine of that era, amazing for a gas engine. Build quality and longevity of this engine family was above anything else for a gas-burner

[@TurbineFlyer]

Oh the good old days of cheap gas, Hall Scott engines and these engines.

[@wyattshaffer2257]

Have you done one on an strait 8 buick/ fireball 8 engine yet?

[@jonathanryan2915]

Yes, the Buick straight 8!

[@Dukers2300]

How you aren’t racking up millions of views is beyond me. High quality content my dude.

[@antor.j.medrano]

I can only imagine the sound when it's pulling.

[@craigwhittingslow9689]

It makes a very low tone resonance that goes right through the walls of a house at 2 blocks away. 🙏🙏👍💪

[@antor.j.medrano]

@@craigwhittingslow9689 kinda like past GMC school bus w/ BBC 454.

[@ericblom9568]

There in the West Texas oilfields, alot of the survivors of this massively over-engineered marvel reside as pumping motors on tank batteries. Basically, the storage tanks next to the pumpjack..

[@noduh736]

Gm made even bigger v6 engines big block I'm not exactly sure what the cubes are but it's close to 500 cu in I seen one in a old gmc dump truck and it was huge and really caught my attention

[@turbo8454]

The 478 was the biggest V6.The dump truck in my avatar picture has one.

[@jonathanryan2915]

GMC made 305, 351, and 478 V6's. I believe they were all called big block V6's

[@turbo8454]

@@jonathanryan2915 There were three other V6's too. 379, 401 and 432 V6's. The 305, 351 and 401 came out in the 1960 models. The 478 came along for '62. The 379 was a 351 with a 478 crank and the 432 was a 401 with a 478 crank. Both of those were '73/'74 only. The V12 was used from '60 to '65. For the '66 models, the 637 V8 replaced the V12.

[@jonathanryan2915]

@@turbo8454 oh yeah, I forgot about the bigger ones

[@Prowbar]

@@turbo8454 would love to see a video. Building up a 478 V6 for my 65 GMC pickup.

[@braziliansheetbox2497]

Imagine a fully build top fuel V12 That would be owesome

[@michaelwebster8968]

Thank you for an outstanding engine video. I study different ice designs and applications.

[@Freighttrain-yd4fz]

I would love to find one of these engines. I have no idea what I would put it into though.

[@thomasshelby1922]

I literally found one today with all original parts but it’s been in shop for decades and by shop I mean some tin with dirt floor. Couldn’t see it because it was covered completley in Busch light cans

[@gregmaday1331]

I really enjoy your videos. I'm a bit of a geek when it comes to engine designs. On that topic... Is there any possibility of a video regarding Ford's "Super V" engines? They were built from 1958 thru 1982. Displacements of 401, 477 & 534. They were made for heavy trucks, and they also had a marine version for boats. I believe the block deck was machined at an angle, much like Chevys 348/409. Thanks!!!

[@jimm2442]

Excellent as always! How about a Hall Scott V12 video?

[@stoneylonesome4062]

I always thought Chrysler should’ve made a V12 from two Australian Hemi I6’s sharing a common crank case. It would’ve made a good power plant for a Viper, especially if they were gonna make one in the late 60’s.

[@DKaye-r8p]

Many of these engines wound up as oil field pumps in OK and TX where they ran wide open at 1200rpm for months at a time. In oil field service, they would be run off of Natural Gas instead of gasoline. this kept the motors virtually carbon-free which extended their life. in the late 90s, i saw at least 3 of them on pallets at a machine shop in Dallas in for another rebuild. the thickness of the cylinder walls meant that they could be rebuilt up to 10 times with custom pistons. Wiseco had those pistons in its catalog with overbores up to .180 inches.

[@jamesmulanax1424]

International made a large V8 at 549 CI. Physically, it is a HUGE motor to withstand the rigors of truck life. Massive! Interestingly enough, the GMC V6 and V12 was eventually phased out by the GMC Detroit Diesel already in production. I have a GMC 432 V6 that has 1 cubic inch greater capacity per cylinder than the then popular GMC 6-71. The physical size of the diesel is so much bigger than the V6 making the gas motor overall a smaller package gas for diesel.

[@markbroad119]

What about the Toroflow? Big block V6

[@chuckselvage3157]

The power rating isn't important it's the torque rating which is quite healthy for hauling heavy loads.

[@Allaboutfamily2374]

Never seen one of these v12 love too have one in my shop 😂

[@JC-gw3yo]

I remember Safeway using these engines in their store to store delivery trucks in the early 70's

[@MrMan5014]

It’s odd that GM didn’t make a diesel version of this engine considering they made a diesel version of the 637 V8, and the 351/401/478 V6’s in the toro-flo engines…which were decent engines and very good on fuel!!

[@fadedsoul23]

they were going to make a bigger one based on the 478 v6, would have been a 956 v12. its a shame it was never made, that would have been so cool, especially with boost

[@StevenGlansbergg]

My pops has this exact motor in our garage. Bought it off a guy on Ebay back in the day and has been collecting parts to build it into a hotrod some day. Great video btw take my sub!

[@MarkBerg-tk8js]

FWD built one Seagrave straight frame 100 ft standard rear mount ladder.

[@vermt001]

If you haven't already you should do a video on GMC's big six engines but this was based on

[@jacoballred]

Those v12 gasoline engine's were very loud in big trucks pulling a heavy load. Although people that build Hot Rod's value those engine's.

[@Jarcca]

I been hunting for pictures and measurements of the engine so i can trey and build a 1/35 scale model of it for a project. Not an easy task so far :D

[@thomasshelby1922]

I literally found one of these in an old shop that belonged to my gpa

[@emilianocruz11]

Hey my friend we need a story about the crazy v16 engine was a prototype engine using in the Cadillac Sixteen AND the crazy 7.5lts v12 was in Cadillac cien concept from 2002

[@leonb2637]

Don't forget too that diesel may not have been available in many communities, even farm equipment had gasoline engines then.

[@joesalazar770]

I'm definitely a deisel guy. But the old engines will never be beat I'm reliability. And for size cat makes the bahemoth for. The marine ships at a whooping 185 litre size try to fit that in a Corvette 😀🙃👍 but I am doing an interesting build on a 93 wrangler I'm stuffing a 1500 rwhp 12 valve Cummins into it. Size wise it shouldn't be bad. Length for trans t case exc I may need to stretch it a little or use just a sleeve between the diff and the trans 😁😀

[@brownwrench]

GM already had a whole family of acceptable diesels at the time.

[@thecaptain3773]

I have a repair manual for these, and they were crap, it was supposed to be for garbage and fire trucks. The only thing it did was pave the way for diesel to become more popular because it got like 2 to 6MPG. They were a bitch to time also, as my grandfather installed these at the factory.

[@firstlast---]

An interview with your grandpa would be really cool

[@thecaptain3773]

@@firstlast--- Sadly, he passed 24 years ago, but I still have the manuals.

[@knurlgnar24]

Fuel efficiency wasn't important for most of the intended applications at the time making your claim disingenuous. No argument about the timing difficulty though. These were well known for being inexpensive to purchase, uber reliable, with extreme driveability given their torque at under 1000RPM. If you had one of these in a vehicle that wasn't intended for heavy work then you had the wrong engine. This was not a garbage truck engine. Bad application.

[@johnelliott7375]

I know a guy who has one in a stretched 32 Ford with a 10 speed transmission.

[@donmunro144]

My father had one of these when I was a kid. He used to brag that he could outrun the diesels. I didn't know it was such a dog. But I wish I had that truck now.

[@ryanehlis426]

The Detroit 12v 71 was a common power plant

[@mikeskidmore6754]

This is an individual throw for each rod and piston too ..

[@denisdoucet6517]

Theres one if these at my highschool

[@ethanhoullahan5423]

Pretty sure these massive gmc engines are related to the Toro Flow diesels too which is another engine family nobody really knows about.

[@aShinySpork]

Am I the only one who wants to put this in a regular pickup

[@TheHomeMaker1]

They are still in use my family owns x7 catfish farm ponds very very large ponds half and quarter acre sizes and we have x2 if these old double gm6’s built onto custom trailers and they drum roll please are water pumps

[@shantoreywilkins651]

🏎️🔥🎊🎉🎇🎆🎇🎆

[@mikeskidmore6754]

GMC V-6 401 CI & 474 CI 534 and 637 CI so V-8 Engine too ..

[@briansmith8385]

The GMC V6 were 305, 351, 401 and 478. The 305 was the optional engine for GMC pickups and suburbans. I think the 351 was offered in 1966 for pickup trucks. Many medium trucks up to 65000 pound gross combination weight used these engines . I think the last year they were offered in pickups was 1968. Around the early 70s two displacements of 379 and 432 were created and the earlier engines dropped. I think the last year for the GMC V6 was 1973.

[@scotthultin7769]

I like 637 ci gm it has 5.125 bore and 2.5 stroke I wish the engine builders of the ear and now that our building drag racing engines with you the more that you can a bigger stroke so we could have like a 2300 cubic inch engine

[@turbo8454]

The 637 shared the 478's stroke, at 3.86".

[@JS-kd7jf]

Well for your information it doesn't have hydraulic lifters,, it had solid LIFTERS LIKE THE BIG BLOCK V6S look at the rocker arms,, they're adjustable!!! So it's SOLID LIFTERS!! I wish you fellas would get all the FACTS STRAIGHT before putting this stuff out!!!

[@jessechristensen6028]

There’s and even rarer diesel version of this engine out there.

[@Khalilsafwan-vt9xq]

Hi Is the 2016 Toyota Highlander 3.5 fe engine the same as the 2010 Toyota Venza 3.5 engine?? Thank you

[@shdwwzrd69]

I know where there are 2 v12s sitting in trucks still

[@supremeflagship8965]

Yet even this 702ci V12 engine pales in comparison to Hall-Scott 1091ci straight-6...

[@johnelliott7375]

And they got used and used well.

[@michaelbenardo5695]

Come on now, we used CUBIC INCHES, NOT LITRES.

[@marknaravas318]

Watch out calling it a twin six. You’ll get the packard guys on your butt

[@stewartalbert3523]

Pierce guys also

[@pete1342]

It's a 1500 lb engine. So much for " performance "😂

[@270eman]

My V6 Tacoma puts out more horsepower.

[@FYMASMD]

Car related KZbin channels are on their way out. How many videos are out there on this engine?25-50.? Make sure you have a backup plan buddie because this is played out,

[@JS-kd7jf]

They had SOLID LIFTERS DUDE,,, NOT HYDRAULIC LIFTERS!!! GET YOUR FACTS STRAIGHT BEFORE PUTTING OUT THE VIDEO!!

[@brownwrench]

Interesting, but not that great. Poor performance for the size.

[@CBREngines]

Thats crazy that a 1996 460 efi was 900 pounds fully dressed... thats wild that a v12 11l was not 2x the weight of the 7.5 forf.