dumb question about timing

[BryanDyer]

is it safe to advance the timing to 15° on the stock ecu to get more low end power and better gas mileage if I lower the boost down to 10 or 12 or so or will I get detonation?

 

[terrenceLP]

"is it safe" - Probably not but if you can't test don't do it.

"low end power and better gas mileage if I lower the boost down to 10 or 12" - Stock boost was like 6-8psi and driving a Supra and worrying about gas mileage is an oxymoron.

Tune is right and don't worry about economy. If you short shift and stay out of boost you can get 18-22 mpg. Again it's almost a 2 ton vehicle.

 

[IndigoMKII]

I wouldn't play with the timing at all, my car still gets pretty good gas mileage the way it sits. If you want an extreme gas sipper, buy another car.

 

[Nick M]

You are also giving a false base for injection timing.