Quote:
Originally Posted by Jon3sgte
I know i can run 15 degrees with 91 but what is possible with 100 octane or an 87-91 & 100 mix? i'm having my timing advanced thursday and want to push it as much as i can. I have an intake and header back exhaust 3". This is not a daily and i dont push it hard often. Just a weekend cruiser and an occasional drive to work (less than .5 mile)
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How is the timing being advanced? Are you just re-clocking the distributor? Are you going to be tuning this on a dyno or doing the” advance it until it pings” route? How much power are you hoping to gain?
For what it’s worth I’ve been running 14 degrees advanced on 87 octane for over 2 years on my 5SFE. I’ve never heard it ping and have seen no signs of detonation on the spark plugs.
Maybe start with 1/3 of a tank of 91 and have some 100 on hand if you run into issues?
Quote:
Originally Posted by Jon3sgte
is it possible to tune a FPR myself? I know most AF guages are just blinking lights and dont really do much but look cool. i'd rather avoid a piggyback or similar tuner as my mods dont really justify having one.
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Are you running out of fuel? What are you trying to accomplish? Yes you can tune a FPR yourself, it’s easy to adjust the pressure, but unless you have some way of monitoring AFR or are really good at reading your plugs (not recommended), I’d think you’d just be mostly guessing.
Unless you have upgraded your cams I doubt you’re going to find the limits of the stock fuel system.