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Old 09-28-2019, 07:16 PM   #1
CarbonZHP
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Looks like the motor is done

Making 10.8 psi at the manifold, no misfire, but under boost its blowing oil out of the valve cover gasket. Getting a ton of crank case pressure. I measured compression low on one cylinder and when I dropped oil in the compression came up, pointing to piston rings. It also dynoed at over 100hp less than before. Going incredibly rich on boost. Looking at the mass airflow readings, seems like all the boost is going straight past the piston, causing very rich afr. Looks like Ill be building a new motor.



Planning on doing upgraded piston rings and the M50 manifold. I haven't decided yet on studs and head gasket change.

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Last edited by CarbonZHP; 09-28-2019 at 07:17 PM.
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Old 09-30-2019, 05:44 PM   #2
Dogthebountyhunter
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Jeez I bet that was fun while it lasted. What's the point of m50 intake? No disa?
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Old 09-30-2019, 09:50 PM   #3
CarbonZHP
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Much higher flow while being simpler
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Old 10-01-2019, 01:48 PM   #4
VitalyZHP
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Any idea what caused this? Mine's holding up strong at around 10 psi with decompression plate and 10mm ARP studs
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Old 10-01-2019, 01:56 PM   #5
CarbonZHP
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Model: 330Cic ZHP
Transmission: AT->5MT->6MT
Iíll be doing 10mm arp and a vac gasket at 0.09. I think itís the piston rings. Maybe issues with the oil and ethanol


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