piston question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

2_fast_240 · 03-19-2006, 04:20 PM

i am rebuilding my ka right now and wanted to get it boost ready. i was planning on putting the engine in the car before i put a turbo on it for money reasons. i was wondering what kind of performance 9:1 forged pistons would get on a na motor. it seems like it would slow it down some considering the lower compression and extra weight.

gotta240 · 03-19-2006, 04:59 PM

Why not go with a slightly lower comp. ratio? Are you planning on low or high boost aps?

I'm not positive, but i think you will have LESS power than stock, you will get bad gas mileage, and no fun to drive... but i dont see why it wont work untill you get the boost flowing.

2_fast_240 · 03-20-2006, 12:03 PM

i was only planning on around 10-12 psi when i get the turbo on. i thought higher comp. meant more power as long as it doesnt blow up.

wootwoot · 03-20-2006, 12:35 PM

It will make less power with 9:1 since it is lower then stock but will be able to handle more boost. 9:1 is what I would go with and I like CP pistons

03-19-2006, 04:20 PM	#1
2_fast_240 Zilvia Member Join Date: Aug 2005 Location: Virginia Posts: 194 Trader Rating: (0) Feedback Score: 0 reviews	piston question i am rebuilding my ka right now and wanted to get it boost ready. i was planning on putting the engine in the car before i put a turbo on it for money reasons. i was wondering what kind of performance 9:1 forged pistons would get on a na motor. it seems like it would slow it down some considering the lower compression and extra weight.

03-20-2006, 12:35 PM	#4
wootwoot Post Whore! Join Date: Jan 2004 Location: sarasota florida biatch Age: 39 Posts: 3,850 Trader Rating: (0) Feedback Score: 0 reviews	It will make less power with 9:1 since it is lower then stock but will be able to handle more boost. 9:1 is what I would go with and I like CP pistons __________________ I'm from Florida so I'm probably a bit more strange than you

03-19-2006, 04:59 PM	#2
gotta240 Post Whore! Join Date: Dec 2005 Location: so cal Posts: 3,496 Trader Rating: (21) Feedback Score: 21 reviews	Why not go with a slightly lower comp. ratio? Are you planning on low or high boost aps? I'm not positive, but i think you will have LESS power than stock, you will get bad gas mileage, and no fun to drive... but i dont see why it wont work untill you get the boost flowing.

03-20-2006, 12:03 PM	#3
2_fast_240 Zilvia Member Join Date: Aug 2005 Location: Virginia Posts: 194 Trader Rating: (0) Feedback Score: 0 reviews	i was only planning on around 10-12 psi when i get the turbo on. i thought higher comp. meant more power as long as it doesnt blow up.