L337TurboZ

iTrader: (1)

Whats up everyone? I have been searching around for timing numbers for a while and have seen mixed numbers so hopefully someone here can answer my questions.

I currently have a 1990 1.6 SNC running a Haltech Sprint 500 ecu. It does not have knock control so I haven't gone too crazy with timing. Car runs well, I eliminated the AFM and have a Cusco intake as well as headers, test pipe, and exhaust. Right now I'm at 28° of advance at 7000 RPM. I'd like to get an idea of the max timing that can be pulled without going past MBT or creating knock across all RPM ranges. I can always post the map I'm using (basically the regular haltech Miata base map with a few changes here and there)

Thanks for any help and input y'all can give me.

ryansmoneypit

iTrader: (6)

just a thought since all engines are NOT the same, an hour on a dyno would give real answers. Should be very easy to find a dyno in C.SC.

Run your map, add 2° across the map until you stop seeing significant improvement, then back off 2°.

18psi

iTrader: (76)

at 27 you're about there on pump gas. 27-31* is what I tend to see depending on pump fuel quality

sixshooter

iTrader: (12)

A spec Miata guy I talked to who owns a dyno uses 30 degrees at WOT for the upper RPM range, fwiw.