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Originally Posted by Jordo!
1. Don't know, it's all hearsay. You tell me how that would happen? My guess is there were other things going on with that motor or the tune that were not explained. Maybe that one revved to 10,000 RPM's.
You're saying these were all unmodifed, bone stock engines with a stock ECU tune? I call BS on that. There is no way a four banger made nearly 40 more horses due to a lucky engine build or ECU transient modifiers such as fuel trims and ignition advance.
2. The Nismos have a different tune, my guess being especially in the VVEL.
Seriously, what would be the logical possible cause of the alleged factory freakishness?
The only major variable is going to be how well the engines break in, which could result in small differences due to compression. For the rest, the ECU is going to keep the tune fairly stable so long as nothing else is changed.
The biggest variable will be the weather.
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I was there for the dyno runs, saw it myself. All four cars were stock AP1's, with between 15-30k on the clock. I had never believed that FF's had existed (aside from examples of hot cam in grandma's buick), but having seen it in person makes me wonder a little.
The early hand-built prototypes of engine usually make more power than the production version. I think the early build F20C's laid around 285 bhp, but it was toned down for the production model, since there was some allocated variance in the spec. Maybe his engine happened to have gotten tolerances just right, maybe the ECU adjusted a little different...I don't know. His car laid down notably more power, and was faster on the drag strip than I'd ever seen from a stock S2K.