Engine build, cylinder scoring, thoughts please

I started pulling my motor apart today to install my CP low compression pistons and found that polaris had not tightened down an intake hose clamp and it had sucked some dust. It has 43 hours and 4xx miles but no telling how long it has been going on. My fault for not catching it. It felt tight ish but clearly not tight enough.

It was running great and not using any oil before disassembly. Naturally I checked the cylinders over really good and could see some visual scoring but when running the finger over them, I feel nothing. However when I run my fingernail over them, I can jusy feel 1 or 2 of them, but still very minor. I have definitely ran worse before, but not on a boosted engine.

I would greatly appreciate your opinion whether I should throw it together and try it , big bore kit, or just replace the stock cylinder? Other options? I am kinda on a budget but if not reusing the cylinder is a must, I can deal with that.

I like the sparks BBK as it uses a closed deck design, but I feel that going to 96mm pistons may make my stock rods less adequate to hold up to 15psi on E85… thoughts?


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Engine build, cylinder scoring, thoughts please

I started pulling my motor apart today to install my CP low compression pistons and found that polaris had not tightened down an intake hose clamp and it had sucked some dust. It has 43 hours and 4xx miles but no telling how long it has been going on. My fault for not catching it. It felt tight ish but clearly not tight enough.

It was running great and not using any oil before disassembly. Naturally I checked the cylinders over really good and could see some visual scoring but when running the finger over them, I feel nothing. However when I run my fingernail over them, I can jusy feel 1 or 2 of them, but still very minor. I have definitely ran worse before, but not on a boosted engine.

I would greatly appreciate your opinion whether I should throw it together and try it , big bore kit, or just replace the stock cylinder? Other options? I am kinda on a budget but if not reusing the cylinder is a must, I can deal with that.

I like the sparks BBK as it uses a closed deck design, but I feel that going to 96mm pistons may make my stock rods less adequate to hold up to 15psi on E85… thoughts?


Sent from my SAMSUNG-SM-G890A using Tapatalk