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Discussion Starter #1
I need new pistons so I decide to go 88mm and 12.0:1

Do you guys know who make pistons like that?

thx
 

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Any company could, if they don't already, just need to make a custom order.
Costs a bit more per piston.
I guess that wasn't really an answer to your question, but if no-one makes a shelf piston to your specs, didn't want you to think you COULDN'T get them if you really wanted.
 

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With stock TSX piston you gonna reach 12.3:1
 

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With stock TSX piston you gonna reach 12.3:1
did you even read his post? and where are you getting that info from?

You think if you change a stock TSX motor to a stock block with an RSX-S head the compression is going to change?
 

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Conbustion Chamber volume
K24 53.5cc
K20A/A2 50.7cc
K20A3 48.0cc - from JE
F20C 53.6cc +/- 0.2cc


Also if you check in the application catalog on Wiseco website...

You gonna see if you put 11.7 K20 piston in a k24 block you gonna reach 13.7:1 (if you keep K20 head)

I just try to give the nearest solution of is target comp ratio...without pay for custom piston
 

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Conbustion Chamber volume
K24 53.5cc
K20A/A2 50.7cc
K20A3 48.0cc - from JE
F20C 53.6cc +/- 0.2cc



I just try to give the nearest solution of is target comp ratio
Do u know for sure that all of the K24's have the same volume?
 

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Nope I can't be sure...

but the piston manufacturer didn't notice one is different than the others...
 

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I thought all the k20a/k20a2/k20z1/k20z3 & k24a2 heads were 50.5cc

lol I mean we all know the k20z3 uses the same head as k24a2 right? so if dark2k1 was right we would be slapping z3 pistons into a2/z1 blocks & getting a lot higher compression - which we are not

edit to the OP - get 12.5 CR 88mm pistons that any piston manufacturer has on the shelf & open up the valve reliefs a bit... low & behold 12.0cr 88mm pistons :silly:
 

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Discussion Starter #11
I don't want to pay for custom pistons that's why I'm asking you guys.

Right now I have stock K24 block + K20 head with oversized supertech valves.

I'm going to use Brian Crower stg2 cams.

What pistons are you suggest? 87.5, 88mm? 11.5:1, 12.0:1 or 12.5:1?
 

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Go with Wiseco 12.5:1 piston....

in few week this one gonna be in mass production....
 

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Because Wiseco its the only brand you can really trust

They have better valve pocket and they take less expansion with heat,

Every serious import engine builder only trust Wiseco....

Just in exemple.... with CP piston you need .008 clearance with the valve...and this is only .002 with Wiseco
 
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