avoctane

iTrader: (17)

Hello all,

This is my first post on here and I want to see if anybody has had experience with a LS1 to LS3 swap such as the LS376/480 Crate motor. I need the stock tune file for it if possible for my LS1 PCM which will be in my 2002 Pontiac Trans Am LS1. The motor gets here Tuesday so I will be starting the motor hopefully by the next day. Any and all help would be greatly appreciated, thank you!

I will be doing the following...

- LS1 knock sensors on the side of the block w/ extensions
- LS1 Map w/ extension
- LS1 to LS3 cam sensor extension
- Lingenfelter 58x to 24x conversion module
- LS1 to LS3 injector adapters

The only power mods aside swap mods will be the following...

- Long Tube Headers
- Full 3" exhaust w/ SLP LM1 muffler
- SLP Lid

lees02WS6

iTrader: (5)

I did the LS3 525 last winter. Very much a straight forward swap.

https://postimg.cc/gallery/VM15hkd

avoctane

iTrader: (17)

Thanks! I just got my motor today, so i've been cleaning up my tubular k-member and other parts to get it ready to start putting together. Lots of great photos too!

Casper01WS6

Considering doing the LS3 swap myself...original LS1 has over 202k miles. What did you do about the harness and PCM? Anything tricky I should be aware of? Thanks.

avoctane

iTrader: (17)

the swap was pretty straight forward, tap the side of the block where the knock sensors go and screw in your ls1 knock sensors there, and buy the 58x to 24x conversion box, and you’ll just need the map extension