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Old 02-01-2013, 03:06 AM   #1
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Default Result of boosting w/0 warmup

Turkey day this year i drove my Miata early in the morning and didn't let it warm up. The next day i opened my hood to find oil blown everywhere from the dipstick and assumed i ruined my rings. Turns out i cracked piston number 1. This was at 264 hp/220 tq powerlevel 1.6l stock with meth.
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Old 02-01-2013, 03:12 AM   #2
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I feel like it was more than a cold start that did this.
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Old 02-01-2013, 03:17 AM   #3
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Seems like too much timing advance with temperature drop.
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Old 02-01-2013, 03:28 AM   #4
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Was running the same spark tune for over 2 months. The temperature was 40* minimum. Plus I drove that car hard more than once. Surprising the crank and bearings look really good for 130k. I acquired a short block tonight that i will use one of the pistons and rebuild.


Edit to add: What I meant when i said I drove the car, is I ran through the gears all the way home.
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Old 02-01-2013, 03:33 AM   #5
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The crank is good for a lot more.
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Old 02-01-2013, 09:09 AM   #6
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I never let my car warm up. I boost down the driveway. ringlands dont blow up from that; let's see the tops of the piston, that was detonation's dirty work.
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Old 02-01-2013, 10:24 AM   #7
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yep. that's det
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Old 02-01-2013, 10:39 AM   #8
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What does the bore look like?

Just gonna slap another stock piston in there with no other work done?
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Old 02-01-2013, 10:50 AM   #9
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Come on OP, at least get some egay rods. They will even work with your 1.8 you should eventually build.
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Old 02-01-2013, 12:28 PM   #10
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Bore looks fine. I have forged rods but my plans for this car is rebuild the engine then sell it to get a nb.
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