ballenws4

I have a 1998 trans am that needs a new engine, so I found an ls1 from a 2002 trans am (all stock) to put in it. I'm wondering what incompatibilities there are and what to do.. I've heard the wiring harnesses are different, not sure to what extent, and pvc system is different.. not sure how transferable that stuff is.. The car has been tuned, so the egr valve has been removed along with the pipe going into the top of the intake. Also has SLP longtubes. Any help would be much appreciated! i think i'm in the right place lol..

wisconsin_ws6_fan

Here is a helpful link to another post that will explain the differences between an earlier Ls1 and a later ls1. https://ls1tech.com/forums/new-ls1-o...-ls1-cars.html

Stan1911

Sounds like you are in for an adventure, all the best getting it in there.

Kevin Lee 487

iTrader: (1)

2001-2002 LS1s didn't have EGR valves to begin with.

alex722607

iTrader: (4)

so whats the story with the motor. Are you any further with the swap?

ballenws4

Thanks yall! The swap went smoothly and i sold the car about a year later. There was a lifter tick and the seller told me afterwards that he had nos and a supercharger on it before. I still VERY MUCH regret selling that car. Black with tan leather, 6spd with ttops.

Drknow

Oh, the pain!!! I know that feeling all too well!! That’s why I don’t EVER sell my sport/muscle cars, or my trucks anymore.

The last one I sold was my 1990 Camaro RS with LQ4 bored and stroked to 427 ci, using an Eagle rotating assembly. She had the T-56. When I did my LS swap, I had to make a lot of my stuff as it wasn’t a very common thing yet. The F.A.S.T. 90mm intake was one of about 3 or 4 you get. I sold the car about 10 years ago and I’ve regretted it every day since!