MCX Apex 310 kit compression ratio?

TURBLUE

TY 4 Stroke Junkie
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Sidewinder MTX
wondering the older apex kits 06-08 they said 310 hp on pump gas with and extra fuel pump.....what was done with the compression ratio? 2 head gaskets and LC pistons? My sled has 2 head gaskets and LC pistons...they say 17psi with pump gas, which I have run for 3 years....not convinced that it has much more power as it run 12psi with the head shim.....The compression after 3 years is 105 psi on all 4...that seems low to me...
 
Whats are you running for pistons and shims on the 310 kit?
 
Guys running MCX310 around here use 2 gaskets and Wiseco 10:1 pistons, CR at 9.43:1

Same compression across, sounds good to me. If you had a damaged engine you would have readings all over the place.

Did you test with throttles fully open, reads higher. Try another comp.tester, some does read faulty values.
 


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