> NA SR's make best power at 13-13.3:1 but that is the > absolute edge of whats safe. It would be better to up > the fuel pressure slightly to get it a little richer. > Might lose a couple of hp but it will be safer. > Mike K, what about boosted cars like mines?? I brought a AEM wideband, so is 12.5 best for boosted vehicles? Mike??? Joel