1991 427 C4
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,638
Likes: 326
From: Greenville SC
1991 427 C4
Anyone check out the new Corvette Fever with the 1991 C4 with a 427 (bored to 440)? Nice car, and looks very streetable making 575 CHP. To bad someone doesn't make one of these blocks for an LTx car. What is the main obsticle with putting a regular SBC in an LTx car and having the heads converted: the computer or mounting and accessories?
Burning Brakes
Joined: Apr 2002
Posts: 1,126
Likes: 0
From: Cleveland OH
Originally Posted by Bruce
I think that car were LPE prep car. Were for sale long ago, asking a lot of $ for it.
This one was TPIS prepared. It's a nice car. Saw it in Bowling Green 2 years ago. Met the owner who was also a really nice guy as well.
Ron
Race Director
Joined: Mar 1999
Posts: 12,597
Likes: 237
From: Bartlett Illinois
If I get a chance I will scan the article..
That car ia Very cool. I was actually impressed by the power the car made before swapping heads.. in the current set-up it had TPiS ported AFR220 heads and made 575HP, with the GM Fast Burn Heads it made 525hp..
From what I remember the article said it had:
427 Motown block bored to a 440
4" stroke
11.5:1 compression
AFR220 heads
ZZ-X Cam
1.6 Rockers
Headers (forget the brand)
TPiS Exhaust ( I am guessing the 3" flowmaster set-up)
That is all I can think of at the moment
That car ia Very cool. I was actually impressed by the power the car made before swapping heads.. in the current set-up it had TPiS ported AFR220 heads and made 575HP, with the GM Fast Burn Heads it made 525hp..
From what I remember the article said it had:
427 Motown block bored to a 440
4" stroke
11.5:1 compression
AFR220 heads
ZZ-X Cam
1.6 Rockers
Headers (forget the brand)
TPiS Exhaust ( I am guessing the 3" flowmaster set-up)
That is all I can think of at the moment
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by -=Jeff=-
If I get a chance I will scan the article..
That car ia Very cool. I was actually impressed by the power the car made before swapping heads.. in the current set-up it had TPiS ported AFR220 heads and made 575HP, with the GM Fast Burn Heads it made 525hp..
From what I remember the article said it had:
427 Motown block bored to a 440
4" stroke
11.5:1 compression
AFR220 heads
ZZ-X Cam
1.6 Rockers
Headers (forget the brand)
TPiS Exhaust ( I am guessing the 3" flowmaster set-up)
That is all I can think of at the moment
That car ia Very cool. I was actually impressed by the power the car made before swapping heads.. in the current set-up it had TPiS ported AFR220 heads and made 575HP, with the GM Fast Burn Heads it made 525hp..
From what I remember the article said it had:
427 Motown block bored to a 440
4" stroke
11.5:1 compression
AFR220 heads
ZZ-X Cam
1.6 Rockers
Headers (forget the brand)
TPiS Exhaust ( I am guessing the 3" flowmaster set-up)
That is all I can think of at the moment
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Race Director
Joined: Mar 1999
Posts: 12,597
Likes: 237
From: Bartlett Illinois
Originally Posted by tjwong
Remember what intake that they used on it?
Originally Posted by 95wht6spd
What is the main obsticle with putting a regular SBC in an LTx car and having the heads converted: the computer or mounting and accessories?
Swap BCM with one from a 1991
Swap ECM and engine harness with one from a 1991
Swap LCD on cluster for the LCD from a 90-91 cluster
there may be a couple wire splices between the IP harness and ECM harness but it would not be too bad.
OR..
get DFI, F.A.S.T, or BIgstuff to control the motor and keep the rest OEM
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
Originally Posted by 95wht6spd
Anyone check out the new Corvette Fever with the 1991 C4 with a 427 (bored to 440)? Nice car, and looks very streetable making 575 CHP. To bad someone doesn't make one of these blocks for an LTx car. What is the main obsticle with putting a regular SBC in an LTx car and having the heads converted: the computer or mounting and accessories?
I cant remember the company that do it, but at least 1 of you will have seen the article in VETTE, called Retched Excess, the 1000 BHP daily driver. Its a red C4 coupe, and its bored to 421 cubic inch with the LT1 block, they cut open the plenum and open the internals up on that, and do a few other things... Anyone remember that one?? Looked quite stock on the outside except the 11 inch rear wheels and roll bars.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by -=Jeff=-
Miniram and 58mm TB.. I knew it I just forgot to type it.. LOL
Main obstacles so everything works?
Swap BCM with one from a 1991
Swap ECM and engine harness with one from a 1991
Swap LCD on cluster for the LCD from a 90-91 cluster
there may be a couple wire splices between the IP harness and ECM harness but it would not be too bad.
OR..
get DFI, F.A.S.T, or BIgstuff to control the motor and keep the rest OEM
Main obstacles so everything works?
Swap BCM with one from a 1991
Swap ECM and engine harness with one from a 1991
Swap LCD on cluster for the LCD from a 90-91 cluster
there may be a couple wire splices between the IP harness and ECM harness but it would not be too bad.
OR..
get DFI, F.A.S.T, or BIgstuff to control the motor and keep the rest OEM
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Diabolical Dave has a 427 in his C4. Custom stealthram intake as i recall. You may be able to find it in a search. He has a full website on the buildup.
