Heys guys,

My neighbor just gave me a Prom from a 1986 Vette.

anyway, my car which Had a LB9 5.0L was taken out and fed to the dogs. My new setup .. a MAF L98 backed by a 700r4.
will this 86 MAF vette prom work with a 1989 TPI car?

I was intending to run my 350 with the 5.0 PROM,
instead I could pop the 86 vette prom in that is already dialed in for an L98.

I was told using the 5.0 prom would still run, but who knows how well it would run.
my guess is it would probally be tempermental

 

Why not just get the correct PROM? I don't think it will work well if at all.

 

It should work, but you won't have a cold start routine, so startign may be a problem. There may be other issues as well.

A $6E ARAP-based *.bin is likely going to work best for you.

 

Running my MAF 355 with a TPI '87 305 PROM, correct 350 injectors/ESC, no cold start.

Cold start IS the worst issue, although there is a healthy off the line bog if it's floored. Mileage seems to be less than optimum too.

Trick I found for cold start is to crank the engine for a split second, then crank it like normal immediately after. Essentially adding a bit of fuel. Starts much easier like that.

Correct PROM is upcoming, I've got the tools to burn them now, it's the "right" fix.