TwinTurbo.NET: Nissan 300ZX forum - I suspect the Ash Tune
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Subject I suspect the Ash Tune
     
Posted by lazer(NV) on July 01, 2009 at 12:58 AM
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In Reply To Ran on they Dyno... Somewhat disappointed w/ Tune posted by Keaner on June 30, 2009 at 11:00 PM
     
Message You should check your compression numbers to be certain but if I'm reading that A/F right you're running way rich. If I remember correctly he tends to tune on the rich side but even for 91 octane you look WAY rich for 17psi. There is a misconception that if you tune the car rich nothing bad will happen. Most off-the-shelf ECU tunes are rich because people with chips tend to crank up their boost controllers from time to time. The real trick is to tune the ECU rich, tune the boost controller to the desired manifold pressure, then go back and re-tune the fuel and ignition maps for Wide Open Throttle. Then put the car on the road and tune all the part throttle points on the fuel and ignition map according to your desired A/F ratio say 12:1. Then don't up the boost.




"The 300ZX Turbo is a dance; it's a song; it's rolling, roaring automotive art. There is no color that doesn't suit it. There is no mood-lifting chemical substance it can't replace." - Automobile Magazine

     
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