EFIDynoTuning Forum

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.

yeah no problem

start by yanking out 8 degrees over 3/8 throttle ~typically 50 load.

The dial it in from there.

Thanks decipha

Just curious, has the OP tried this yet?

Any major difference on the butt-dyno?

This market sucks to own things that get less than 20mpg...



Jeremy

I haven't yet, but definitely going to. I will post back with results