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So what is being claimed here is AFR (air/fuel ratio) tuning is not important? Well folks, looks like another case of Loren trolling the forums to spam for business. If you really believe in what you post, why don’t you go to the Innovate Motorsports forums and tell the thousands of users there what a dumbasses they are for investing all that time, energy, and money with the instrumentation they are tuning their cars with?
Nothing worse than using nondescript data from unidentified sources and unknown factors to make a claim in your favor as something scientific. Why doesn’t he disclose what kind of car this is, what are the modifications, and who was doing the tuning and how? Have you ever been to a dyno in your life? If so show us what you did instead of pulling charts out of some else’s ass and posting that as your own.
Ok, let me guess, it wasn’t a 911 or any variant, but a home built turbocharged car of some sort, where boost pressures were experimented with, and Loren had nothing to do with the tuning as we all know he doesn’t know what he’s doing anyways. But if this were a normally aspirated engine our 3.2s, it is a complete FAIL. Neither of the runs of the AFR chart are done correctly! Why would anyone compare one bad result to another and claim that as conclusive?
Proper AFRs are just as important as optimal ignition timing to achieve optimal performance. For a normally aspirated motor such as ours, at full throttle, too lean such as 14.0 and the engine runs hot and can’t take much ignition advance loosing torque and HP overall. Too rich such as 11 or 12 and the excess fuel extinguishes the burn, reducing the peak combustion pressure and thus loosing overall torque and HP. As the chip tuner of target here, from tuning many 911s over the years, through hundreds of dyno runs each year, correctly optimizing the AFR makes half of the HP and torque gains over the stock programming. In certain rpms, it’s responsible for as much as 2/3rds of the gains. The remaining half is from ignition timing optimization. And you can't properly optimize timing if the AFRs are off for the very reason stated at the beginning of this paragraph.
Bottom line, go back to rebuilding alternators instead of posting on subjects you know nothing about. Nothing worse than disseminating bad information on an automotive forum as fact.
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