Forged rods and stock pistons: semi-reliable on track? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-06-2010, 08:19 AM   #21
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Does anyone know how durable the stock 94-97 pistons are? I have read that they are good for +300 whp. Marc @ has written that 350 whp would be ok.

So has anyone broken the stock pistons when using the forged rods at certain power level without detonation?

Last edited by Marko; 08-06-2010 at 09:06 AM.
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Old 08-06-2010, 02:51 PM   #22
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I'm planning on going the m-tuned rods and stock piston route with my EGT motor rebuild. I figure I tune fairly conservative and its more of a weekend warrior/street racer so its not getting beat on too badly anyways so hopefully they'll hold up OK.
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Old 08-14-2010, 02:19 AM   #23
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1.8 dohc, 215 compression with [email protected] cast pistons, 15 psi .50 trim T3/T4.

Bent 3 stock rods, no detonation, pistons are intact, minor scuffs on the sidewalls as I kept driving them with the bent rods until it finally died.

Miata cast pistons hold very well under boost as long the mixture is there.

Although, now I am building one with SuperTech [email protected] with M-Tuned rods.
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