I need to know what pistons i should run i have a 99 cobra with procharger. i want to reuse my block and my crank because my crank is already forged from the factory and i know i want manely h beam rods but im not sure on pistons. what type of pistons should i run to hold boost? should i go dish? and also what cc? i see some offer 17-23cc im gunna reuse my stock heads but put better valves and springs in them. Also im going to get my block bored 0.20 over i just need to know what pistons i should run?
What pistons should i run?
- Thread starter 2001SilvrGT
- Start date
don't go lower than 9.5:1 compression and that means a dish of around 5cc.
Some people say i should run flat top and run a c/r of 10:5
Here's the deal, a CR of 9.5-10.5:1 will work. The higher the CR the lower the max boost. Also, some tuners don't like to tune higher CR, FI combos that run pump gas, especially when it's less than 93 Octane. With that, I have no problem with flat tops and FI as long as the boost is kept to a minimum. The higher CR will allow for more pre-boost power and more tq.
Do not go with a CR lower than 9.5:1 as it kills power.
So for a 9:5 c/r what type of piston should I run dish or flat top?
Diamond makes a 6cc dished! My Manleys are 11cc. And MMR has take off sets of H-Beams rods, the other day in a post they said $350...
I flat top will NOT equal that CR, as nasvt said a low single digit cc dished is the ticket..:beer:
use a piston that has no more than a 7cc dish, preferably 5cc to 0cc.
okay thanks guys
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