timing Questions

High doesn't really mean your getting the most power...there's a point where power drops of...Proved that to myself on the dyno...so high doesn't mean its best....My runs proved 14 to be more power than 18...take it for what its worth..
Running that high you should be running 93??? I would keep an ear out for pinging...if all's cool, then leave it be...
Run up to 4th about 2500 rpm then pin it....if its quiet...things are cool..if it sounds off pinging back it off...

Andy is so spot-on. Like he said, you can advance past the power peak but before the onset of detonation. That is just another reason not to run on the ragged edge of detonation.

I am very jealous of you - I get pinging at low RPM (like 1100-1700 RPM in OD while going up hills, even on 91 octane). So enjoy!!

i can only run 8* without pinging...i'd love to run AT LEAST 10*

im at 15 rite now and it pings sumtimes, but other times it doesnt. if i keep it at 15 and run 93 octane and get a fuel pressure regulator and set it to 38 psi will my pinging go away? becuz thats wut i was told

Personally, I wont up the octane to accomodate more timing. E.g. if I can run 10* on 87 or 15* on 93, I run the former. IT is all about the piston-position relative to the ignition of the mixture, and the lower volatility of higher-octane fuel allows more timing, but changes little (we are not talking about race gas here).

As I recall, the SN puter adapts WOT fuel trim (unlike a fox) so I will leave the AFPR to those that datalog.

Are we to assume that you ping at WOT? Otherwise, the FPR wont help - for sure at part throttle the puter adapts injector pulsewidth to get you back to stoich (if you raise pressure, the injector will squirt the same amount of fuel as before by having a shorter dwell). I am very sure the puter adapts at WOT too, but I dont want to possibly give bad info.

Good luck.