Quote:
Originally Posted by Baltothewolf
I read about advancing (or is it retarding?) the timing 1-2° but does that really help? I have a friend that would be willing to do it for free and then change it back for smog. Also, would tuning the ECU help? With that being said, would advancing/retarding timing effect mpg at 65mph?
|
Advancing can increase nox due to slightly increased cylinder pressures. This increase is also why most 80-90's car can benefit from some advancing (were retarded relative to ideal from the factory).
Can it improve your car? Depends. A D15z1 is advanced about 4 deg from the factory relative to all the others, and is why it has different timing marks. I have tried advancing and retarding it in 1 degree increments (-4/+4), nothing was better than factory. You would have to look at your car to tell.
If you're looking for low end, cut weight. Either from the engine, or chassis. Gearing will help too, but is just done off of the final drive will hurt highway mpg. There are other ways, but they can be hit/miss and not easy or cheap.