Search found 3 matches

by 88351stang
2022 Dec 07, 19:36
Forum: GUFX - 89-93 Foxbody ECUs
Topic: timing and 87 octane...or even 89
Replies: 4
Views: 1833

Re: timing and 87 octane...or even 89

I haven't yet, but definitely going to. I will post back with results
by 88351stang
2022 Nov 17, 10:49
Forum: GUFX - 89-93 Foxbody ECUs
Topic: timing and 87 octane...or even 89
Replies: 4
Views: 1833

timing and 87 octane...or even 89

Hey guys

I have searched and found varying results and opinions on this. 351W flat top pistons (10:1 static compression ratio), GT40 X305 aluminum heads, X303 cam and GT40 intake. All my timing is set up for 92 octane right now. Is it possible to lower it enough to run 87 octane? I have seen where some have said don't even try it, so wondering if yall have tried something similar. Been driving the car a little more lately with diesel prices the way they are, but premium is not saving me alot.