Xtreme,

How can you say that an SAFC isn't what we need on turbosystems? It's a very versatile instrument that is practically required to run our car's system with any increase in injector size, our computer alone can't do that well enough. Using a wideband O2 sensor and working on the dyno, guys are figuring out what A/F ratio they really need for maximum power for their particular car. With the variability in fuel and turbo systems among the 420a crew, I think using an SAFC is not only the smart thing to do, it's the safe thing to do. The SAFC is extremely useful in this because it can change the fuel mixtures and work on ignition timing itself. Ask a lot of guys with turbocharged FACTORY cars and this is one of their first mods. My 300ZX TT friends say it is a must on their cars once they are using the huge Nismo injectors. This J&S safeguard would be very useful at times, but I'm not sure the increases in power would be worth it. The safety of it on the other hand is good to have, but watching EGT and A/F ratio within your car on the gauge pod is just as important. You can't change timing yourself while your driving, yea that's great it can do that, but for those of you running your turbosystems on the street, why not just be a little conservative and run a bit rich? U aren't exactly out to destroy the competition on your way to work. Having the safeguard at the track would be nice but if you are a racer, you are prepared to break stuff and often want to have a complete stand-alone management system where you can use your laptop to change timing and fuel curves yourself. I think Armond's ideas make more sense. Also, how on earth do you figure the SAFC is useful for the NA boys? I know we have a rich spot in rpm, but what are you going to pull by leaning that out a little bit? Definitely no more than 10 hp and you'd be lucky as hell to get even that much. The NA cars are not going to make disgusting power, I would love to see an NA with no N20 make more than 200 hp and break into the 14's. Personally, I don't think it's going to happen without insane amounts of money that are definitely better spent elsewhere, i.e. turbo or different car. The more air they are moving from the intakes, headers, cams, even the porting or smoothing of head and intake manifold isn't going to allow it to make the kind of power you want, I wish it could challenge an S2000 on horsepower per liter but it's not. And with that extra air moving, the computer is going to compensate slightly and we may still run a tad rich or maybe lean depending on whether the computer picks it up or not. Regardless, you either run extra injectors, an SAFC, or a stand alone system.

Good luck with the J&S. I doubt they even make one for the car I'm building right now, Ford's EEC-IV is a great computer and we'll be running a programmer with it that let's us change timing and fuel on an rpm basis. Too bad Chrysler didn't include that kind of ability into our ECU.

Luke

1998 Mustang GT 5-speed
2002 Lone Star Shelby Cobra Replica