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Nov 9, 2005 | 02:40 PM

VETTELT1

Thread Starter

1st Gear

Joined: Nov 2005

Posts: 1

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From: SPRING GROVE ILL

Lt1 Swap

I'm Swapping A Lt1 Out Of A 96 Impala Ss Into My 75 Corvette The Vette Has A 4 Speed Trans I Would Like To Retane The 4 Speed Has Anyone Done A Swap Like This I Have All The Wiring Ecm Everything From The Ss Any Help Would Be Great

Nov 9, 2005 | 05:13 PM

MEGALADON

Safety Car

Joined: Apr 2004

Posts: 3,997

Likes: 1

From: WAY DEEP INSIDE AMERICO,YES YOU LIVE HERE TO!! TX

it's still happening

Nov 9, 2005 | 05:59 PM

davidm_comp

Racer

Joined: Mar 2005

Posts: 473

Likes: 2

From: Champlin Minnesota

At the risk of sounding stupid, how does an LT1 out of a 93-97 differ from a first gen chevy engine. What I am really trying to say, is there a way I can just use the heads, intake, and wiring from an LT1 on my gm crate 350, or would I just be further ahead if I found a complete LT1 engine?

Nov 9, 2005 | 10:44 PM

The Ram

Racer

Joined: Nov 2005

Posts: 310

Likes: 1

From: Glenn Heights Tx

ill let you guys deal with the crappy optispark while i stick with a nicely tuned 350 and carbed...if anything go LS1....

Nov 10, 2005 | 09:52 AM

holley505

Drifting

Joined: Nov 2004

Posts: 1,971

Likes: 7

From: Longwood Florida

Quote:

Originally Posted by davidm_comp

You would not be able to... because of the opti spark.

GEN II SBC are basically the same short block but GEN I engines use a Distributor. Oh yeah the water neck and pump will need to be chanmged. You can get a LT1 intake modded. to accept a GEN I distributor and run the timing like a tradition SBC using the LT1 heads and Intake... but now you need a custom computer and harness. I have seen the setup before. It would be easier and cheaper to run a TPI setup with vortec base and heads for about the same power. Slightly different RPM range though. LT1 has short runners.

Nov 10, 2005 | 10:32 AM

markdtn

Le Mans Master

Joined: Aug 2003

Posts: 7,720

Likes: 12

From: Chattanooga TN

See www.corvettefaq.com for more LT1 swaps. You will need to send your PCM to Street and Performance or somewhere similar to get the VATS turned off, changed to manual trans configuration, and other stuff-HOWEVER you would probably do better changing to a 95 back harness and PCM because 96 is ODB2 and you have to keep lots more stuff to make it work. 96 engines accept 95 back harnesses with no problems, you kust don't use the cam sensor. The biggest issue with a mass-air fuel injected engine swap in any C3 is the mass air flow meter mounting. If using a stock engine it is much cleaner to use speed density. Street and Performance or Howell or others can walk you through that part. Do a search on LT1 swap or Tuned-port (TPI) swap, much of the info except the Optispark is the same between them. As far as bolting to the transmission, it is no problem. You need a flywheel from a 97 4+3 I think. That should be 1-piece rear seal but not dual-mass.

Nov 10, 2005 | 10:38 AM

I'm Batman

Team Owner

Joined: Oct 2004

Posts: 23,831

Likes: 10

From: Springfield MO

St. Jude Donor '07

I'm converting a set of cast-iron LT1 heads to the SB1 flow pattern, and using an LT1 intake with a distributor hole for the fuel injection. Since I can program my own chips (the equipment isn't that expensive), that is one issue that doesn't exist for me. BTW, I'm using a TPI computer to control all of this. No more crappy carb for me.