[oldman]

there was a 400 cid corporate limit before 1970. Vette and COPO among the exceptions. I guess Caddy also as all their engines
were bigger than 400 cid. There was a real issue when the small block went to 400 cid.

Want confusion and I would not know this unless I had one. A 1977 400 cid, 4 bbl, 4 speed Firebird was a chevy 4 bbl 350 small block in parts of California and Hawaii.... the auto birds got a 403 olds (sold as a 400) only the optioned manual WS6 package w72 engine was a Pontiac 400 cid 4 bbls.. a very rare bird. I don't know outside of these areas but yep if you checked 4 speed, 4 bbl and did not pay for the WS6 handling package etc... it was a chevy 350 4bbl. Not that I minded, if you did NOT check the 400 cid box you got the 301 4bb 4 speed, by then the Poncho engines had cast iron rods and were going down to the hated 301 that even with a turbo (came in 1979) could not beat the average 240Z. I'm not stretching to say that a 289 2bbl with a 350 CFM carb of a 390, dual cherry bombs with a 3 speed manualm one legger 2.89 Mustang was more than a match for 301 bird 4 speed.

[2SSRS@Gen5diy]

Originally Posted by Battlezone580

A 750hp or even a 650hp N/A engine would be amazing I agree.

But N/A engine with 750hp would be up in the ranks with Ferraris and Lamborghinis, do you know the maintenance costs associated with hp high N/A engines?

Besides the maintenance cost, the cars MSRP would skyrocket. There's a reason we can get ZL1's and Z06 for 1/3 of the price of supercars. And you can thank that reason to supercharged V8's with little to no maintenance upkeep.

This is what the new LT7 is and the second unknown engine is, but with an American twist, its not as refined and will not need the massive maintenance of its EU competitor.

[shaffe]

Originally Posted by 2SSRS@Gen5diy

This is what the new LT7 is and the second unknown engine is, but with an American twist, its not as refined and will not need the massive maintenance of its EU competitor.

I thought the LT7 was the turbo DOHC for the mid engine vette?

[oldman]

IMO, the mid engine DOHC V8 vett is a myth. The handwriting is on the wall when Ford went to a V6 twin turbo in the GT40, and long before the Hellcat, Dodge was looking at a twin turbo Pentastar V6... if there is an engine in the a mid-engine vett, which I doubt, it will be a twin turbo V6.

[lt4camaro]

Originally Posted by shaffe

IIRC it was 68 or 69 when all the 396's actually were 402s. But all the marketing materials just kept calling it a 396 bc the 396 had a lot of street cred at the time.

The 402's were 70,71 and 72. 396's from 1965 to 1969.

[lt4camaro]

Originally Posted by Quinten_33

Yeah the talk on the Corvette forums right now if that future Corvettes will feature a 4.2L DOHC V8 and a 5.5L DOHC V8, no word on if they’d have forced induction or not. A 427 in an SS 1LE or a ZL1 would make an awesome Z/28 though.

Didn't that post on the corvette forum mention 650 hp and 850 hp, those motors would have to be twin turbo's to make that kind of horse.

[ChefBorOzzy]

Originally Posted by oldman

IMO, the mid engine DOHC V8 vett is a myth. The handwriting is on the wall when Ford went to a V6 twin turbo in the GT40, and long before the Hellcat, Dodge was looking at a twin turbo Pentastar V6... if there is an engine in the a mid-engine vett, which I doubt, it will be a twin turbo V6.

Good thing you're wrong.

[Bhobbs]

Ford went to a TTV6 in the GT for racing regulations and as a flagship for Ecoboost. That doesn’t mean GM has to follow their path.

[oldman]

Originally Posted by ChefBorOzzy

Good thing you're wrong.

Only if you are made out of money is a twin turbo DOCH mid engine Vette is a good idea. Just IMO of course.

[Bhobbs]

Originally Posted by oldman

Only if your made out of made out of money is a twin turbo DOCH mid engine Vette is a good idea. Just IMO of course.

Why would a DOHC mid engine Corvette have to be expensive?

[oldman]

Originally Posted by Bhobbs

Ford went to a TTV6 in the GT for racing regulations and as a flagship for Ecoboost. That doesn’t mean GM has to follow their path.

My thought process falls under cost.

[oldman]

Originally Posted by Bhobbs

Why would a DOHC mid engine Corvette have to be expensive?

Find me a "cheap" mid engine anything, find me a cheap twin turbo V8 anything, this is not the first mid engine GM speculation Vette, this is not the first twin turbo mid engine V8 car, this is not the first DOHC Vette, not one parameter above is "cheap". My IMO conclusion is it ain't cheap. Reading the top Z/28 threads the common thought was too expensive and too track focused. Let's pretend we are talking engine only a DOHC 5.4 liter V8, I would speculate because of external size it will fit only in the Camaro (NA only) and new mid engine Vette. That means the total cost of design, tooling, parts, training, support is born out by a very very limited model which are sold at huge profit vs a minimal profit 4 banger Camaro. I personally don't see it and it we do IMO it is going to be jaw dropping expensive.

[Bhobbs]

Originally Posted by oldman

Find me a "cheap" mid engine anything, find me a cheap twin turbo V8 anything, this is not the first mid engine GM speculation Vette, this is not the first twin turbo mid engine V8 car, this is not the first DOHC Vette, not one parameter above is "cheap". My IMO conclusion is it ain't cheap. Reading the top Z/28 threads the common thought was too expensive and too track focused. Let's pretend we are talking engine only a DOHC 5.4 liter V8, I would speculate because of external size it will fit only in the Camaro (NA only) and new mid engine Vette. That means the total cost of design, tooling, parts, training, support is born out by a very very limited model which are sold at huge profit vs a minimal profit 4 banger Camaro. I personally don't see it and it we do IMO it is going to be jaw dropping expensive.

Pontiac Fiero and Toyota MR2 were cheap, mid engine cars. The engine location has little bearing on the cost of the car. Most mid engine cars are expensive because they are carbon fiber super cars. The mid engine Corvette is being built the same way the C7 is, aluminum frame, steel bracing and composite body panels.

[oldman]

Really, 30 years ago and 20 years ago and 140 HP.. they were cheap cause they were cheap. But I like to play a base MR2 Spider was = $24,500 and the corolla with the same engine base was $12,600. Yep about twice the cost to make it mid engine... real cheap.