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

[@Fauxbra]

You had me at "We cast our own DI big block heads".

[@GregQuirin]

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

[@Ang3lUki]

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

[@ShadowOppsRC]

Right! ! !

[@coachbobby2037]

😂😂

[@MovieMuscle]

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

[@jetink600]

When i read the title i thought it was just gonna be a stripped out drag racing car. This is 1000x more impressive!

[@GregQuirin]

Thank you!

[@bobross2066]

I own 2 C8 corvettes please keep us posted. We would love to see more on this build. I hope GM is watching. It’s nice to see someone. Do GM‘s job for them. Keep up the good work.

[@GregQuirin]

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

[@GuitarManiac64]

This is exactly my kind of conversion. Older but larger engine modernized to the extreme with factory controls. Amazing.

[@scottm7341]

Wow, that's taking hot rodding to new heights! Maybe even where no man has gone before..

[@GregQuirin]

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.

[@RoHFCoder]

As a C8 Stingray owner, this is exactly the kind of content I've been waiting for!

[@GregQuirin]

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

[@ShadowBoss0001]

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

[@ShadowBoss0001]

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

[@Korruptionen]

I've always wondered what the potential of the 8.1 was. Cool to see an old school dude hot rod new tech.

[@GregQuirin]

Thank you

[@sweetgomez8529]

Finally someone willing to bring back the NEW UPDATED VERSION of the L-88 Big Block Chevy Vette. You GUY'S ROCK.....

[@MrUltraworld]

Forget the myriad of costs involved for a moment. Can you imagine the cost and complexity of designing and casting your own cylinder heads for direct injection? That one complexity would floor most if not all auto fabricators with one swipe. I'm very interested in this build, please continue your excellent coverage.

[@gar24407]

Forget about the C8. A direct injection and variable cam big block. Hell yeah😁

[@zmotorsports62]

I'd like to see more coverage of this build. Thanks for showing. Mine

[@GregQuirin]

Sure thing! More to come!

[@Levibetz]

At first my reaction was "ho bo big clock vette 🙄" but then, with the custom DI heads, those hard lines, the intent to run it off the stock ECU, the dry sump. This is an incredibly impressive project, very keen to see how this runs!

[@drummerdoingstuff5020]

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.

[@sigmaprojects]

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

[@larryhofer2266]

So am i :)

[@bobsmoot8454]

This is some serious re-engineering of a cutting edge sled. Putting a BB into the C8 is insanity but soooo cool. The fabrication of various components strikes awe in any hotrodder’s life. This fellow is the real deal. Looking forward to seeing more on this wild project, thanks

[@johngoodwin2384]

Larry is a good guy, I sold him lots of forged pistons for the 8.1’s in the early 2000’s. Easy to get along with, smart.

[@cujet]

The thing about a big block, is that they are very satisfying to drive. Great power everywhere.

[@GregQuirin]

Absolutely I couldn't agree more

[@derekmaxwell8164]

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

[@MF-Rell]

​@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!! 🤭

[@sigmaprojects]

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

[@garyplewa9277]

Wow, between Pete and Kevin and now Larry you have one of the most fascinating channels Greg! Thanks for posting these videos. I can wait for the next installment.

[@jaym4763]

Hell yes we want to see it run

[@benburris4735]

Worlds first direct injected big block and w/ vvt…

[@smithjohn3080]

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

[@TresCatahoulas]

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.

[@rickbaker9053]

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

[@anthonydavis5993]

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!

[@michaelatkin9649]

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

[@2lucky01]

Larry is genuinely a good guy. I spoke directly with him ordering parts for my 8.1 that I put in my Hummer H2. Super helpful guy

[@GregQuirin]

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

[@-sh1t]

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?

[@2lucky01]

@@-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.

[@-sh1t]

@@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.

[@twodoortrollZ28]

This is a piece of art that needs to be inducted at Bowling Green

[@thatgreenrcsb]

And then never driven again. No thanks.

[@The-KP]

Looking forward to watching it turn over

[@taylorboultinghouse8296]

Rad project! Pete is one of the few masterminds that still challenges builders to rise to the occasion.

[@mrmiscast]

Who else wants a pair of those heads right now...

[@hendo337]

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.

[@GregQuirin]

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

[@freethinkingamerican80]

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

[@larryhofer2266]

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

[@TheMrDarius]

I’ve finally found a direct injected big block. What an absolute treat!

[@ryder2shae]

These guys never seize to amaze. I thought putting a duramax in a 67 impala I'd challenging. My hats off to these wizards.

[@papajoewil10]

This is one of the most impressive automotive videos I've seen in a while. Very well done.

[@schmegle3237]

Of course we want to see them put a big block in a c8! Everything is better with a big block Chevy! I love your channel.

[@nicklazarakis4837]

Cool stuff, very focused and switched on. Nick Melbourne Australia

[@tbart2437]

Yes, please show us more when he starts it up. Thank you.

[@RoniHakim-y8w]

What a legend … I take my hat off to you Larry… keep up the good work mate … only if this world had more geniuses like Larry and his team.

[@Sdpartscenter]

Larry's a wild man! Will be interesting to see this all buttoned up and running!

[@chuckpierce3084]

automotive creativity know no bounds. Yes please follow this insane project!!!!!

[@WorshipDaKing]

we need more

[@shawnwalsh5430]

Thanks Sir! Old knowledge is the best! These guys never stop showing what passionate people can do ! Waiting to see it finished.

[@farmerkevin]

Keep them coming. BBC (old school definition) is the best.

[@GregQuirin]

Thank you more content coming soon

[@k00lkidz4]

Bro saved himself with that (old school definition) lmao

[@D.Magic_]

I look forward to an update to this mad man's project.

[@hunnybunnysheavymetalmusic6542]

RUBY needs something like this!!! Tell ol Cleet to watch this and take notes!!!

[@C6Z_Bob]

That is WILD. I'm super impressed.

[@greggreg2263]

Can’t wait to see this brand new c8 Corvette fly. I would like to see some donuts and because it’s rear engine maybe you could jump it a little bit🙏

[@robs85gmc]

I love the ingenuity, this is really amazing. Please follow up with this build!

[@GregQuirin]

Will do! Stay tuned!

[@caesar1295]

Please do not miss anything from this point. Looking forward to see this C8 tear up the road.

[@GregQuirin]

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

[@gizzmo5952]

Very freaking awsome!!!! I take my hat off for you guys... last big block vette I drove was my convertable 70.

[@GICK117]

I hope to see this c 8 finished. I am usually a tractor and diesel guy, but this channel is speakin a language I am drawn to.

[@chadeverhart2451]

I can't wait to see this thing fire up!

[@Lagrange1186]

This is crazy… first big block C8… first direct injection big block… first VVT big block… might as well do them all at once 😂 love it keep the progress coming!

[@williamquinones2870]

Most definitely I want to see this Corvettes progress please keep me updated

[@tmr626]

This car is going to sound great!

[@GregQuirin]

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

[@mkefayati473]

Direct injection and then port or multi port. This is something I have never seen before. Impressive how you got it to fit with a DCT. Forced induction! 😮. This thing is gonna hurt a lot of peoples FEELINGS! 😅

[@matthewmiller2268]

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

[@RobertWelchman]

KEEP US INFORMED!!! So want to see this running. Thanks!!!!

[@paulcabinatan2390]

This is way more impressive than watching KZbin car personalities race to throw turbos on something.

[@SportModDriver88]

Hey Larry, I have most of your books and you've helped me via email with my 8.1's in my boat. This really goes against the grain when it comes to "if it ain't broke don't fix it". Really awesome retro! I can't wait to see the performance of this thing.

[@robking9857]

I have been following LT for some time with his 8.1 AWD drag truck. This has taken the 8.1 concept to a whole new level.

[@Chilly383]

This build is wild

[@masmas6846]

Wow!!! Please keep the videos coming and just let the man talk! We wanna hear all the details!

[@waynemetevia7983]

I like his comment, "We tried it and it didn't work, so we'll just make our own." Must be nice to actually be able to do that. Have never heard of variable valve timing before.

[@mikesmith7447]

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

[@GregQuirin]

@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

[@waynemetevia7983]

@@GregQuirinAppreciate the information. Thank you

[@jimbo2487]

Engineering at it finest, can’t wait to see how it runs.

[@jonbrockman5308]

One of my favorite engines. The 8.1 vortec (ls bog block) so cool you cast DI heads for it. Bet the output is pretty impressive as well.

[@242bleek]

Wow very nice work!

[@luisorejel6195]

That is amazing. The amount of r and do going in to this build is crazy

[@StuartBlake-iz6rf]

Larry, very impressed with your tenacity. Can't wait to watch the next episode. Definitely interested in the 8.1 developments.

[@larryhofer2266]

More stuff coming soon!

[@barneymiller6204]

Yes, we want to follow this guy!

[@elfuturomio]

Good to see their still some out there with a PAIR 🤣👍🤙

[@matt9675]

That's insane. Beautiful work

[@dssm25]

Content is great interesting problems to work through not many people would have chosen the 8.1 I myself like them nice to see a change of engine choice

[@chadwickwitherspoon5185]

Please continue coverage. Awesome project

[@L.E.Hovdenes]

I own an 04 Sierra 2500hd with an Allison/8.1. Has about 127,000 miles, very, very clean in silver birch metallic. Plan to completely upgrade it with forged internals, turbo, full suspension, etc. as money permits. Been eyeing Raylar parts, and watching Lt Tolman and Holdener for ideas. Can't wait to see how this project turns out! Might be able to utilize some things that you pioneer.

[@FlexinTexMex]

This is insane ,he is a visionary absolutely incredible work can’t wait to see final results please keep us updated 🙏

[@Roddy_Zeh]

Curious to see how it goes! I had doubts regarding the packaging in the C8's structure! 👏🏻

[@larryhofer2266]

the packaging of this car from GM is spectacular. Cant see it breaking, now the clutch is another matter.

[@Roddy_Zeh]

@@larryhofer2266 Aftermarket companies already make strengthened double clutches for certain transmissions (for example, Dodson has kits for Porsche's PDK units). I think it's a matter of time until we see these companies developing solutions for the ones on the C8 and Shelby GT500.

[@ChiTwnKid96]

This engine in an E-Ray would be 🤯

[@jaytrock3217]

I had 8.1 in 2002 2500hd 4x4 brand new. I really never used the truck for much. I bought it to do a tow a traveler trailer. Only towed my Jeep on a flatbed. That thing would go up to the Loon Lake from the bay area get the same gas mileage back. Amazing the power that engine had back then.

[@socdy600]

Awesome!!!! I was hoping to see somebody do this

[@GregQuirin]

Hope you enjoyed it!

[@robert23497]

Can't wait to see more Larry magic. Also, can't wait to see it run

[@larrynance17]

This is going to be awesome. I just want to see how that transaxle will hold up with the torque coming from that big block. Or will there be some sort of torque management used. Im loving this. Cant wait to see it run.

[@noob5000000]

Very cool, I love the clean integration with a/c and everything. Subscribed, looking forward to updates.

[@GregQuirin]

Thanks for the sub! I appreciate it!

[@audiwankenobi361]

This is seriously next level type of stuff. Matter fact,dude is on another planet!

[@markjohnstone4914]

Very interested to follow Larry's build! Thanks for posting Greg!

[@markwilding5108]

This C8 is going to be wild….definitely want to see this run haha

[@beedub0218]

Yes, please keep following this 🙏

[@roadrat33]

PLEASE post some dyno #'s and road course foootage of this car when she's buttoned up. Absolutely cool!

[@mrhassell]

The size of that monster! Its a work of beauty.

[@MrUltraworld]

My only apprehension would be cooling, but after listening to this gentleman I think he has that worked out. At 494 cubic inches, that motor must make a mountain of torque, and with is comes heat. Everything I have heard about that transmission has been very favorable, I'm sure it's up to the task at hand. My other apprehension is the computer, but HP Tuners has helped me in the past and really did a great job.

[@johnathongulley1146]

Welp i would definitely loke to follow this build. Im really starting to love these 8.1L..

[@choward874]

Awesome! What a lot of work getting the old out and new behemoth in!

[@brunobalestra]

Itching to see it on the Dyno

[@THESLlCK]

this might be the first engine swapped C8 corvette ever

[@GregQuirin]

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

[@THESLlCK]

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

[@scotthultin7769]

1.7K+ 👍's up Big Block Corvette thank you for sharing 🤗

[@petertorregrossa5457]

WOW! Just crazy! I wish I could shake your hand sir.

[@erikradzins]

FACT: When I met him at PRI, and he told me he was going to do this swap.... I figured, 1) thats going to be wild, and 2) I bet he actually does it. Glad to see he did!

[@GregQuirin]

That's awesome you ran into Larry at PRI!

[@1slow.grandsport628]

I definitely wanna see this finished!!!

[@robostyle9773]

Thanks so much for posting this video! Really appreciate it

[@SteveButler-v2g]

can t wait to see run

[@mikesmith7447]

Lawrence Tolman needs to see this.

[@GregQuirin]

Larry and Lawrence T are good friends. Larry makes lots of high performance 8.1 components for boats.

[@denalidriven1574]

Direct injection 8.1!!!!!!!! Unreal.

[@tookeymaxs6284]

Nice ..! No one ever gives the big blocks love this is so interesting.

[@WalterKoszyk]

Sick! Totally dig this build!

[@vongdong10]

Nice seeing an older gentlemen adapt to newer technology

[@backseatdriver4833]

Oh we definitely need more of this!

[@GregQuirin]

You got it! Coming soon!

[@redtesta]

Brilliant. What knowledge and out of box thinking. Any update video on the C8?

[@chillville2938]

Im just so impressed they were able to keeo the ac functional..

[@larryhofer2266]

Gota have AC

[@baby-sharkgto4902]

Hell yes we want more! Thank you 🙏