LM97Z

iTrader: (4)

on an LT1 engine, its a 97 if that matters, just curious what it is on a stock PCM.

96capricemgr

iTrader: (1)

At what parameters? Timing is scaled off things like rpm, MAP, temp. There are 20 tables in tunercat that allow you to modify timing in some way. Things like decel fuel cutoff, EGR, low octane retard etc.

hyperzone

^^^ true.. If you can narrow it down to which one your looking for, I can check my stock tune file and try to get the values for ya. (using LT1edit here)

LM97Z

iTrader: (4)

Ok, i guess scatch it then lol, i'm old school, i was just curious for when i get the nitrous installed, but with all the tables, i'll just get it tuned.

wrd1972

iTrader: (12)

Yup, the timing bounces all over the place from 22-42 degrees.

leadfoot4

iTrader: (1)

Roger that!!

96capricemgr

iTrader: (1)

For nitrous I would strongly recommend an aftermarket ignition box with on demand retard and rev limiter at the very least and a window switch would bve a very good idea too. Mallory 685 is a good choice, some guys like MSD, whatever just use something.

Have the pcm based rev limiter set a good bit higher than you will set the box. The stock rev limiter cuts fuel which is instant death for the motor if that happens while spraying.

LM97Z

iTrader: (4)

Glad you told me that about the fuel , theres a few running with no window switch or retard box, just slap it on & go.

96capricemgr

iTrader: (1)

Yes you can run without safeties BUT it is very easy to lose a motor doing so.