Compression Ratio ?
Size is everything, you know 
May 2, 2006 | 04:37 PM
#13
Originally Posted by TurboBerserker
My advice: pick your boost level (even if it means you have to upgrade your turbo down the road) and build your engine for that level.
I ran 10.1:1 with 10-12psi with meth only as the intercooler on stock LQ9 low end parts. I'm not familiar with the precision turbos, but my Garrett GT67 still had plenty at 12psi -- I'm pretty sure you can pull off 15psi no problem.
I built this block for 18psi and targeted 8.6:1 CR with my cam (and meth+intercooler of course).
The rule of thumb on CR should be to run as much as you can and still get your boost in.
I ran 10.1:1 with 10-12psi with meth only as the intercooler on stock LQ9 low end parts. I'm not familiar with the precision turbos, but my Garrett GT67 still had plenty at 12psi -- I'm pretty sure you can pull off 15psi no problem.
I built this block for 18psi and targeted 8.6:1 CR with my cam (and meth+intercooler of course).
The rule of thumb on CR should be to run as much as you can and still get your boost in.
With that being said I may just go with the 8.5:1 pistons. As addicting as this is I probalbly won't be satisfied with 15psi either. Even with the cr at 8.5:1 it should feel better( not as lazy as) than my bone stock 5.3 being that there is quiet a jump in displacement, head flow (patriotperformance stg3), and cam.
May 2, 2006 | 06:23 PM
#15
Originally Posted by sliderbkt
Old Bull, I went with the 11515's. They are the same dish, but they are made for stock rods. The 11517's use SBC rods.
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