World's First Big Block 8.1L- C8 Corvette Engine Swap 

Larry does lots of 8.1 performance upgrades including special cylinder heads and intakes

@@GregQuirin Genius! Bringing 21st century performance to the big block!

Right! ! !

😂😂

All that for 5 bucks lol. Don't you cast and manufacture your own heads?

Thank you!

Pete, Kevin and Larry are on a different frequency when it comes to this kind of stuff. It amazes me everyday I stop by their shops.

That’s awesome please subscribe to see more C8 stuff coming soon!

Yeah and guess what he probably pays payments for the rest of his life and the stock warranty is now void a lot of people buy that car and they are usually in extreme debt and they really can't afford a ride like that

Plus I bet you that cars price tag is almost 200,000$ plus another 100, 000$ for the engine swap and fabrication needed to install the engine

Will do Bob! I filmed more today, I hope to have it posted by this weekend! Greg

Thank you

This is more innovative and important than what it goes into..

Finally someone working with the 8.1. Best engine out there in the junkyard. I’ve got just under 400,000 of hard work on mine. Have yet to open it up. Still have original waterpump on it.

Yes! I've been wanting to see what variable valve timing would look like on a big block. Awesome! WOW!

I know, I love it. If he supercharged it... The engine would be laughing! That's it! Lol 0-60 will be stupid, low 2's high 1's easy. Will the tranny take it, torque would be 500 lbs feet at 25-3 grand and hold until 6k!

Why didn't GM make this? Ford makes the 7.3 so why not them make an 8.1

Sure thing! More to come!

Yes, they would be insane to swap onto an overhauled newer production used PSI 8.8L core that is commonly available for $1,000-1,500.

Larry Hofer manufactures these heads look up RayLar 8.1 heads and you will find them

Yes!!!! Of course we all want to see and sub'd!

the direct injection heads are difficult. i would still use port injection .better computer options.

I thought this was a way to get huge power bypassing the ECU problem. You can get huge power out of the stock engine but not with ECU lockdown.

@@drummerdoingstuff5020I think the E99 computers have been cracked and now people are reflashing them.

So am i :)

And then never driven again. No thanks.

Absolutely I couldn't agree more

yeah the vvt seems unecesssary for all those cubes unless they are just wanting to keep a lower stall converter for street use

​@derekmaxwell8164 It's torque converter. The stall is what rpm the coverter goes to when the gas pedal is floored. Now that being said this is a dual clutch automatic it doesn't even have a torque converter!! 🤭

@@derekmaxwell8164From the sounds of it sounds like he wants it to work with the factory electronics

Larry is indeed a great guy and automotive ledged. And a very generous person

I’ve been joking about swapping an 8.1 into an h2 ever since I got a silverado with one. I’ve done all sorts of wild stuff with it and it’s never let me down, but the 6.0, that on the other hand, has left a lot to be desired. What all is involved in actually doing the swap? I’ve seen duramax swaps that move the radiator forward and that seems to be the major packaging restraint. I’m very curious about this, especially since you’ve actually done it. What was your experience with it? What should I look out for? Does the computer work directly with the rest of the wiring from the original stuff? I assume most of the stuff should just swap over fairly easily because it’s basically the same truck under all the fancy bodywork. What transmission do you use?

@@-sh1t the radiator and air-conditioning components stay put even reuse the factory, AC pump, I used the stock, H2, PCM, and wiring harness slightly modified the crank sensor and cam sensor wiring swapped in a 4L 80 and the transfer case from an 0809 model I use electric fans and the PCM controls them. I did get a two core aluminum radiator for a 03 Silverado that bolts perfectly, but I added a sitting to the extra heater core hose. I had to cut the top off of the passenger side motor mount and move it forward I think 2 1/4 inch not sure I took measurements with the factory transmission in the truck with no engine, DMAX store upper motor mounts. I’m sure that I’m missing some of the finer details.

@@2lucky01 I looked over your a channel a bit and it seems like you did almost exactly what I was imagining with the swap. I mostly want to keep the insides all mostly stock, mainly for reliability sake. The 8.1 I have has a little over 200k and supposedly had a supercharger on it before I bought it, and it shows no signs of wear and tear. I’ve towed, gone off road, all sorts of activities and it’s never let me down. The h2 is immensely capable off road with the stock engine, however my right foot is left itching with the 6.0’s power level. I have considered looking into the newer 6.6 gas motors and possibly doing a 427 based off that, but I have concerns about reliability and ease of swap. The 8.1 is simple and does everything I ask of it. I’m not too worried about mileage because it’s already not ideal, however I’d like to look into some sort of system that allows the stock drivetrain to run in rear wheel drive if I choose. Around town I don’t really need the full time awd, and it’s a lot of extra drag on the drivetrain that could be reduced easily. I am much more interested and seriously considering the idea of finding a junkyard motor and cracking it open to replace wear items for a swap now. If motor mounts are the biggest hurdle for packaging, I will most definitely be looking into a swap if the 6.0 ever pops or I get free time, haha. Thanks for responding, I really appreciate the knowledge man.

Thank you more content coming soon

Bro saved himself with that (old school definition) lmao

We are all waiting to hear the sound where it fires up for the first time.

We will documenting the progress and posting another video in the near future

More stuff coming soon!

Will do! Stay tuned!

That's awesome you ran into Larry at PRI!

Hope you enjoyed it!

We believe so, if you know anyone else who is doing this please let us know.

@@GregQuirin I've been looking and found nothing at all. Is this his personal channel? I'd like to follow this build closely

Thank you I appreciate it and I also hope to grow the channel a bit more in the future. Are you from Switzerland? thanks Greg Q

@@GregQuirin I was born in Switzerland, but grew up in Australia, Became a motor mechanic in the 80s, Now living in Switzerland doing landscape gardening I love your channel because of it's crazy and very inspiring. Do not worry I am a regular visitor. Thank you again for being you! 👍🔧🔩⚙️❤️🥸😍

Btw take my money!

Im not throwing shade , but I’m curious. Do you mean you never heard of VVT at all? Or just on a GM. big block

@waynemetevia7983 the new C8 Corvette has variable cam timing which is needed as a critical computer output device. Larry has adapted the 6.2 Hydraulic cam sprocket architecture onto the 8.1L big block which will be a first for this particular engine which didn't event have VVT. This will be a huge milestone if it works in the same way it does on the C8 6.2 engine. Larry has lots of time and research invested and we all what to see it work out for him. Thank you Greg Q

@@GregQuirinAppreciate the information. Thank you

Yes if he did dual injection, that would really make a statement.