Thread: Safc2 and Innovate LC-1

I run 91/93 octane as a matter of purpose just so I can keep the timing advanced a little further!

But wouldn't advancing the timing and using a higher octane be less cost effective? And wich timing setting could I use with say like 89 octane?

get the timing to some better feeling 17° or somethin... use 91 octane and go a tad leaner... you should be doing fine.... 15.5:1 keep it in mid 15's

Depends on your definition of cost effective. If it's cost/power, then no, it's actually more cost effective. If it's cost/mileage, then yea, it's likely less. But I wouldn't worry about that. Money isn't a good way to judge efficiency

Others might disagree, but I would suggest not going over 20 or 21 degrees BTDC. I run 19 for 91/93 octane to be on the safe side.

15° base timing for 87 octane, 17° for 89 octane, 19° for 91-93 octane.

Ok so if I was to go with the 89 octane with the 17 degree timing, what a/f ratios should I be shooting for?

Can I do this same thing what your saying and just run 89 octane and still shoot for 15.5:1 or by doing this using 89 octane, should I run it a lil richer?

Again thanks everyone for not giving up on me and for sharing your tunning knowledge This is gonna get my car tuned perfectly for dd and also for taking it to the track.

well you can run timing as advanced as engine knock allows you with your gas octane... feels like you should try and usea a dyno for an hour or so... to adjust that right up... it's the expensive way, but it's the easiest one i guess!!

WOT air/fuel ratio will stay the same regardless of 87-93 octane at 12.8:1. Cruising air/fuel I'd say 15.3:1 for 87, 15.5:1 for 89, 15.7:1 for 91 and 15.9:1 for 93. Those are rough goals, you can waver above and below some.