50 years ago I'd be reading about this in Hot Rod magazine ,where lots of innovative things appeared each month. ,not watching it on a PC. 😁😁

Do more on this engine conversion please, this is incredibly insightful.

Don Taylor is a badass, more of him please!

Just got off the phone with Larry talking about my 2 boat motors that he built. Crazy he spent a half an hour chatting about options for freshening up. Trying to meet up in Havasu for desert storm

Cant wait to see the C8 big block! So wild to see the custom head work.

That blower with the GM logo looks robbed straight off an old Detroit diesel. Very cool that they even made that stuff.

I really don't understand why this channel doesn't have more subscribers,this is top-notch stuff

Awesome work, always wondered when someone would go direct injection on a big block, can’t wait to see more on this!

Bro…your inner circle is First Class OG horsepower junkies

MORE OF THIS! I don't understand why so many Chevy/GM guys delete VVT and/or DI instead of integrating it properly into a build. There's SO much power to be found!

I am 35 years old my first car was a 1969 Camaro it was 38 when I was 16 and you documenting these legends and their engineophile innovations is very much appreciated.

Anytime i watch these the amount of knowledge in everyones head absolutely blows my mind. To be around these dudes doing/learning the things they do is probably the best job in the world

Thats Larry Hofer, owner of the Corvette Shop in San Diego - cutting edge stuff these guys are doing if they cast and machine their own heads! These guys are wicked-smart!

On a whole different level. In a whole different solar system. Mind blowing and amazing.

This is what happens when old school gear head meets a DoD budget! LOL Incredible!

I always was an LS guy, but more and more I become a big block fan.

wow this is so awesome, look forward to the next video of the 8.1 C8

Absolutely love this. I feel bad for the people who don’t get Big Blocks. I’m just here to let ya’ll know “I get it.” Looking forward what’s next for this incredible build.

I'm sure this guy has plenty of money. But still not above using a shopping cart to hold a Big Block research engine. Love the ingenuity. Keep up the good videos.

Great piece, thanks. When Don is expounding please try not to interrupt.

This dude is legendary! So glad I found your channel!

Thank Larry and thank you for your time and this video. I just love this type of content.

I would have loved to have this gentleman as my teacher.

Can't wait for the next video where it all goes together. Thanks Greg for these great videos from these great guys! 👍💪✌

Simply amazing 🎉. Please stay with this until the end 🙏

Looking forward to the next episode. Thanks.

I love when people think outside the box. I also love when they put it into practice

Very interesting indeed, please continue Greg, Thanks

This video seemed to go by in about two minutes when you said “well this is it for this video” I was stunned it was over so fast! Please video assembly of the 8.1 I love this stuff and the 62 Corvette is beautiful I’m one year older than it. Thanks for the video.

It would be nice to mention that, the gear on the back is used normally to drive a stub gear that not only completes the oil circuit on that side of the motor but also drives the standard wet sump oil pump.

That guy is a damn genius... That is some slick ingenuity!! I have an 8.1 in a Suburban I want to save and build when the truck goes to ShIte from rust in time.... This is some exciting stuff to ponder

Mind blowing what he’s doing

im loving this series

my goodness more incredible car stuff ur channel should have thousands and thousannds more subs truly 1 of the best channels ever thank you for sharing all this auto honey with us out here

great content

Great content well done

This is so cool! Keep em’ coming!

Great stuff again Greg! Thanks!! 👍👍

I’m still absolutely loving this DI big block build I’ve been wanting to see someone with the know how to do it and it looks like I’m in luck.

The 2 things everyone deletes when they build a modern engine. This guy said nope, he loves it, and wanted to add it to a engine without it.

All supercool, thanks!

This is awesome brother!!!

LT engines have unique chambers and top of piston shape, I wonder if that was resembled.?

I would love to hang out with him and nerd out on this build.

Amazing!

Mercury Marine 496 HO UPGRADE!!!! Hell yes!!!!

Awesome Sauce

Awesome. Direct injection will probably add 50hp at least if compression is bumped up.

Reminds me of Thunder Power BB 4 valve pushrod heads from the 90’s.

Direct injection big block ❤

Greg, I have an idea for you. You mentioned you were off this week. I'm going to assume that to mean this week but I don't know when this was recorded. If Larry would be up for it I would love a live question and answer session. I would love to ask questions about the process of designing and having my own castings made. I understand that he is probably very busy and doesn't have time to sit around. However if these type of people don't share their knowledge to other generations it will die with them and eventually so will the car culture/hobby. I have a lot of respect for the men that you video and want to say thank you for taking the time to do so.

Great and interesting

I remember reading about Mickey Thompson doing this to a small Chevy in the 60's

He is a brilliant man i seen other things he did. Not sure if it was you who posted it or not thow

I always wanted to see this done to a gen 1 small block

Wow. Thanks.

This is seriously fascinating stuff! I'd love to hear why start with an 8.1 and not the PSI 8.8?

nice, thanks for making these (not a spam underpants thanks but a real one)

What a man

Thanks

that 62 is amazing ,would trade anybodys left arm for a ride

badass

I always thought GM would put more RD on the 8.1. Then, trying to get so much out of the 6.0 or 6.2. Like ford with the godzilla motor.

When I grow up I won't to be just like this man this is the stuff I love eat breath live for I just love it R & D it's so fascinating for me!!

The 8-1, looks alot like a LS anyway. I'm surprised no one is using the truck engines more, the 6.6 or what ever, the gas option for 1 ton and maybe a bit larger trucks , not that familiar. I wish they would build a basically big block LS, a wider bore spacing, taller deck height, possibly a 1" taller deck a spacing to allow 4.250-4.560 bore and 4.300-4.750 stroke up to 604cid with direct injection and port injection, use the port injection for cold start enrichment. And full throttle high rpm. Build a SS-3500 with a big supercharger 10 speed transmission, 604 CID. 20" aluminum rims built to haul and pull toy trailers. Basically a ss454/typhoon style modern truck in dually and single. Making 855TQ and 760hp on 89 octane , and on E85 and the 😮WOW! Tune 990tq, 1100hp stock with tune and exhaust upgrade, and blower pulley, with factory dual 3.5" or 5" single single , stock exhaust. This would be an awesome truck no one could afford, it could also be a hybrid, with a 80-120kw motor in a transfer case like gear box on the transmission, or on the transfer case in 4x4 trucks with a 60 kwh battery between frame rails. With plug in charger and re gen and charge as driving , .5%-15% of the power goes to charging driver set> and Regen or when the brakes are tapped the Regen starts even when driving non ev. Also the motor and engine work together for just under 2000 TQ, about 1400 HP, with optional additional over/under drive in the transfer case, to get roughly 50% reduction and 20% additional over drive, of shift from 1:1 to +.20:1while driving just like a gear change , or change in each gear, making a 10 speed into a 20 speed, or just a 11speed. The 20 ratios works best during slow acceleration. Allow full speed good economy, with smooth gear changes. Similar to a variable ratio or CVT transmission, this is something gm should build! In 4500 also with pickup bed and 4-door . Sorry to dream and ramble!!

If his traditional 8.1’s make 525, I wonder what this version will make.

Big Block Vtech...now this guy has me wondering what it would be like to have a high revving, high comp big block with those cam phasers on.

big block direct.. very deserving. I am curious of durability on that heat angle. I like the gm history. I still run a spider injected truck as if it was a modern marvel. It did everything I had guessed it would back in 1996. The first injection swap..390k miles, at 26 years. and it was my fault I broke it.

Cool

Did you figure out how to make a DUHC kit, yet? so it could have one intake cam & one exhaust cam, with independent timing adjustment

Do you have flow numbers?

The 8.1 uses the same 18726543 firing order as the LS/LT engines. Do you maintain the same firing order or go back to 18436572?

What are the HP/Torque numbers. "Yes"

Where did you get the table top manifold? Would you be interested in selling it? It seems to be low profile to fit my 7.4L BBC in my stock hood 3rd gen Camaro.

They did it this way to stay in contact with stock computer now that global b can tune c8 I would have deleted direct injection or had both like the zl1 or 18 up mustang gt port with direct

wow

What's the point in the mechanical pump lobe when you are running efi? Since there isn't any mechanical pump that puts out 58psi.

did leave the big block with the stock cam and the stock injectors? if you did , this comparison is flawed.

👍

Is the block Iron or Aluminum?

I wish you had posted a direct link to buy his book

You made big deck engine from perfect big deck man I like it really How much cost like this engine???

No one will ever see this but can I get a blueprint / spec sheet for the dimensions use for the injector bung?

Mechanical variable valve timingThat's run by carburetor with no computers you might want to consider that anyway great video

Meanwhile my dumbass is over here with a Dremel trying to guesstimate a port and polish without any idea what volumetric efficiency and port matching is lol

It's beyond me why GM didn't put direct injection on the 8.1 and continue using it for the hd trucks instead of the 6.0 or the 6.6 (gas).

Is thet emeila hartfords camaro I see

Let him do the talking

Using the injectors to cool the air on the blower 'vette,.... Just like a carbed turbo. Nice! When he says 'computer', is he talking a Factory ECM? If this thing works, should we expect GM to copy it? 😂 NA, a big block C8 is going to be like driving the big GT-40 back in the '60's. Add some boost, you'll be hunting Veyron's at 1/10th the price!!!

is the book available as a free e-book

I need to buy that tool, could you guys let me know who you got it from, ill buy it from you if need be

never liked direct injection = fuel flow cleans up ports and adds a cooling affect on valve gear ! = just look at the dirt on street direct injectors ! = great for planes and flying upside down ! but take a lot more to change my mind on this !

Thanks for the video Greg but maybe a little steadier with the camera and not bouncing around so much it makes me a little seasick

Someone call me out for my ignorance, but why havent we made a standalone ecu that can control direct injectors yet? I know holley has a version for gen v engines but im supprised more people havent adopted it yet

GM designed the gen V heads *around* the DI system. I don't think retrofitting the BBC is a great idea. Don't forget the catch can! The 8100 is notorious for a bad PCV system.

Seems like alot of time and money for 30 hp (495 to 525),

If they need a driver for anything salt flats top speed I'm your man I've got Factory traction control built in my right foot!! I will sine my life away I just want to drive !! Red hat is all I want!

But why what’s the goal is it more than 600hp na ?

I find it hard to understand why? why would you go to all this trouble just to make it "work" with the stock ecu. intake cam and exhaust will make the same power in an 8.1..... or really close to the same power. most people want to go the other way and go to port injection. Are you going to run both types of injection, and will it have problems gumming up the intake valves? I'm really curious how much more efficient the engine is maybe that is what will make it worth it. I would have just changed or tuned the ecu.... especially for the vvt. it would have been way easier to change injector drivers and turn off the vvt and keep the stock ecu.

And we all know how reliable those phasers are. Ant then there is carbon fouling of the intake ports.