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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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09-26-2018, 11:33 PM | #15 |
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Just buy a tube of silcone and pull the sump off (i assume the sump doesnt use a gasket) youll be able to tell right away if the rods are stock if they are real skinny. I wouldnt assume based on the noise it makes on a cold start weather the pistons are forged or not, that will depend on what material their made out of, if their 4032 forged aluminum you wont get piston slap
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09-26-2018, 11:50 PM | #16 | |
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@Whoodoo Maybe buy a smaller scope. You can get a cheap $35 endoscope on Amazon. In theory, if all other things are equal then compression testing might show different results. Like if atmosphere is 14.5psi the 10:1 would be 145psi and 20:1 would be 290psi, so maybe a 10:1 might be less than 12.5:1.
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