Quote:
Originally Posted by gsxr750
I 'm using the motor trend nismo to the base model comparisin , to show what little effect a marginal HP increase, in this case none.
Dyno runs are one thing to show performance and I would agree that a 50-100 hp increase would definitly be felt by the driver, but with the marginal 5-10HP from an intake kit, it may not even provide any better numbers than stock if it were tested on the street for 0-60 , 1/4 mile and top end. Test results may even prove worse.
Another thing to point out is that once a modification has been made to the exhaust or intake, the engine requires a new engine map to installed by either a laptop with a proven map for your specific geographical location or a manually adjusted map, calibrated with a dyno and a laptop. In order to take full advantage of the mods.
I know the ECM will relearn itself, as you drive it , but it will not optimize for the best peformance possible, when compared to a dyno/mapping adjustment.
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You are correct, and often times, that's exactly what most people do. Get an UpRev tune to adjust the A/F ratios once all the bolt on's a done. Aside from the exhaust, this is where the Nismo picked up a few more ponies over the regular Z, the tune. For just an intake though, its not really necessary because the ECM can compensate for the increased air flow within the stock maps. It's around $500-$600 for the initial UpRev license.