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What it actually depends on is whether or not you are knock limited currently with 91. Many small-bore normally aspirated engines with pent-roof combustion chambers are not knock limited on 91.
In other words, ignition can be advanced to the point that makes best torque, and further advance results in power actually dropping off. If you can hit that point currently then you will not gain anything.
If you or your tuner tuned the ignition timing on a steady state dyno observing how much hp/degree you were picking up when advancing the timing, and you know if it was tapering off or not as you reached the detonation threshold (assuming that you did hit knock before power started dropping) then you should have a decent idea how much power is left on the table due to octane.
If you haven't done that, then anything is just a guess IMHO.
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1983 Volvo 240 Wagon. S80 T6 Swap.
541whp/467wtq, SpeedPro Dynojet
Quote:
Originally Posted by dizzystar
I am better than everyone, you, your brothers, sisters, fathers, moms, even your fucking dogs. I can drive all drivetrain platforms and all types of industrial machinery, and I got a fucking nuclear sub, yeah thats right, a fucking nuclear sub.
fuck you, and all your shit.
this is revscene in it's entirety. /thread.
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