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>Just wondering because I was spraying nitrous awhile back.
>Just a 50 shot. Better safe then sorry.
>
>Xtreme, how hard were you on the car that you broke a
>piston?
Well i was running 10 psi. Its kind of hard to say exactly what did it, but my guess is detonation. Running that high of boost on stock internals is def pushing them to the limits, but that, with some detonation, is what most likely broke 2 piston ring landings off of the piston. Overall, what caused the detonation? Again, my best guess is this. I was part throttle boosting, not WOT, the ECU was still in closed loop, hit 10 psi, then i heard that nasty metlic rattling (detonation). When in closed loop, the ecu advaces timing quite a bit, and that along with that much boost pressure, caused detonation. But, this is only a good guess. All in all, rule out detonation, I still think our stock internals can handle 10 psi of boost. It just cant handle the extreme cylinder pressures caused by detonation at 10 psi of boost. Factors that can help detonation occur: higher boost pressures, spark timing, and high coolant temps. I may have done the damage when i was tuning my boost controller. I once spiked to about 13 psi on the boost gauge, i heard detonation then too, so that may have done it, cant say for sure. Luckily, I was able to transplant one of Matt_95tgs's old pistons into my block in a day, to get her back up and running until the winter.
13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)
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