rama1r

i have a 99 trans am with a custom cam the specs were secret but i believe they were 586/566 234/224 112 Lobe Center. i also have comp 918 springs with hardened steel push rods. I was wondering if anyone new if i need to get my computer tuned to those specs the car runs good and has a nice lopey idle but sometimes it dies, does anyone have any info on what other part i need like bigger fuel injectors or spark im not too sure. i have air mods and borla with headers also. i would appreciate any help

Angus

iTrader: (2)

post this in the PCM section and or Internal Engine section. I do not know.

'Trust'

iTrader: (24)

you are on the stock tune?

RC_Y2KWS6TA

iTrader: (1)

Yep....112 LSA usually need a tune. Warm starts are a pain.
I had a cam installed and I got and LS1 Edit tune. The car needs more air in its closed loop system (something like that). Also some people drill a little bit bigger hole in their throttle plate instead of a tune. Others mess with the TP sensor instead of a tune.

Also, one of the tech guys on here said that stock injectors are usually good up to 450 RWHP, but I don't knw for sure.

mellowyellow

iTrader: (11)

Yes you will need a tune. I'm surprised you don't have a ses code thrown.
I put a 226/226 578/578 cam in mine and had problems on start up. Took a few times to get it right but ls1 edit can do it all

rama1r

where is the best place to get a tune for the car????
thanks for the other posts

WS-Sick

Well, where do you live? I'm assuming you bought the car with the cam already in it. Stock injectors are definitely fine with your setup.