really low compression

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Bobby17772

Member
I'm building an engine for high boost...well I think it's high for a single cam between 15 and 20 psi. And I was wondering how low is to low? I plan on using vitara pistons and eagle rods which would give me about ~7.5:1 compression. If I was to run it like that with tuning would I have to advance the hell out of the timing or regardless of tuning would it be unstreetable? Because I could get custom rods but I just didn't know how bad it would be if I left it at that low of a compression
 
Thats pretty damn low, I would use something with 9:1. Would take a lot less boost to make the power you want. Less boost = less cylinder pressure= low chances of detonation.
 
boosted engines like you want to build require alot of maintenance and generate alot of heat. streetability? not so much but doable. go like 9:1
 
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