riceball777

Do you have to sleeve the block when running after market forged piston such as je/wiseco/cp/arias?

9krevvin

Yes. The factory block has FRM (Fiber Reinforced Metal) Sleeves that can only be used with FRM compatible pistons. You must put new sleeves to run aftermarket pistons.

riceball777

Are there after market forged low compressions pistons that are Compatable with the stock frm sleeves?

s2000gt35

yes mahle do this check this link

http://www.inlinepro.com/s1/p-187-f2...m-pistons.aspx

miguel329

Yup thats only choice, whats your power goal? Really dont need to lower compression...

9krevvin

I've heard those pistons have problem seizing up in the cylinders.

riceball777

Does anyone run these pistons on the stock sleeves? How about running these pistons with the stock rods ?

I just want to make more power on straight 91 octane. Right now I'm just under 400whp on 91 octane at 11 psi of boost.

I figure with a 9:1 compression motor I can boost a out 20psi on straight 91 octane and make about 450-500whp

gettin it

You should be able to run more power with your current setup pending your fuel setup and turbo. Whats your setup?

riceball777

https://www.s2ki.com/s2000/topic/980...#entry22020937

thats my setup

9krevvin

Not really on 91 octane. He's pretty much at his limit. We have 93 octane here, and my tuner won't go over about 14 psi (around 420-440)on 93.