i have a 00 si with a b16 that recently messed up. im swapping it out with a 00 ls engine and want to know if my current ecu (p28 chipped ecu with b16 program to run 450's and timing retard) will work fine on my ls engine. or will i need to re-chip the ecu?

 

you'll need to rechip the ecu....i actually think you'll hit fuel cut at 5500 with the b16 ecu if you run it on the LS.

Khoi

 

bump bump bump

 

You'll be able to use a ROM for the P74/P75 LS ECU and plug it directly into your P28.