TwinTurbo.NET: Nissan 300ZX forum - Its more a matter of the impact resistance of the piston
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Subject Its more a matter of the impact resistance of the piston
     
Posted by AshsZ of Z1Motorsports.com on August 21, 2003 at 8:56 PM
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In Reply To Another thing, not to be a pessimist (sp?) but.... posted by BigTDogg on August 21, 2003 at 08:44 PM
     
Message itself more than a resistance to heat. That is the major reason for me setting boundaries on total timing advance in the timing maps; I have a pretty good idea on what the VG can do without detonating and there was considerable buffering in the programming to account for the fact that you can't hear detonation with external wastegates.

A stock piston at 700+RWHP will not stand a single event of detonation without suffering ring land failiure. The occurence of this event can be determined by performing a compression test after the dyno session. We did do this and every cylinder was at the same value it was before the session.
Will the stock pistons hold up to 585RWHP?
Certainly, but only as long as it isn't experiencing detonation. The car was tuned for this output on race fuel only (no NOS) and it performed beautifully.

Will the stock pistons, swain coated, stand up to 744RWHP?
Again, yes, but only on the condition that it does not experience detonation. At this power level, detonation will destroy stock pistons, however, being swain coated adds a significant buffer into the system that will keep cylnder temperatures lower during longer, loaded pulls like it will experience down the 1320'.

I have provided specific instructions to Sean about running his car and how the appropriate program needs to be selected and what the maximum safe boost and fuel type he can use. As long as he sticks to my suggestion, he will be OK.



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