Hi Guys,
need advise as can a Wiseco 2.3L pistons use for 2.2L match with 156mm rods with 94mm crank?

Thanks

 

I think the wrist pin is at a different height in the piston due to the longer rod length.

I am sure the engine gurus on here will chime in but I would say no.

 

not on a g63 block

 

correct

 

Just for reference, the Wiseco spec sheet shows the proper rod and stroke length for each of their pistons.

 

You would need 153mm rods with the 94mm crank to use them. English Racing offers the R&R rods in 153mm. Your compression would also be about one point lower than advertised. So if you got the 10.5:1 comp pistons, you'd be at about 9.5:1

 

Omg...Thanks Guys as i thought it should have the same combination for the 2.2L built bcos 2.3L stroke is 100mm with 150mm rods but since the 2.2L crank stroke is 94mm and the rods length has increased to 156mm.

So sad that the 2.3L Wiseco pistons cant be use on a 2.2L built with 156mm rods on a 4G63 block

 

we used CP SC7247 pistons with 156mm Carrillo rods for my cbrd built 2.2 motor.

 

"I have an ultra high compression height piston that sits on my desk as a reminder of why I dont question "the rule".

Aaron"

That is what JohnBradley (Aaron at English Racing) had to say when I asked him about the compression height of that CP piston for 94mm crank and 156mm rods. There is a reason English only uses a 153mm rod with the 94mm crank in the 4g63 block.

 

are you saying that particular CP piston is bad or any piston setup with 94mm crank and 156 rods

 

It is due to the short compression height, regardless of stroke/rod length. Aaron didn't divulge what "the rule" is. But he doesn't recommend the short compression distance of that piston. I'm sure they have good reason for it seeing as how they had R&R build them custom 153mm rods to run the 94mm crank in the 4g63 block for their 2.2SLR engine.

 

I am building a 2.2 right now for myself using 147mm rods. I can choose from many 2.0 pistons with this rod length.

stock 2.0 rod ratio = 1.7
2.3 with stock 150mm rod = 1.5 ratio. (been running these for ten years with great results)
2.2 w 147mm rod = 1.56 ratio. (same ratio as 156mm long rod 2.3).
153mm rod 2.2 = 1.62 ratio. nice ratio as well. but choosing 2.3 pistons for a 2.2 sucks. the resulting compression ratios suck. as the pistons are dished for 2.3 volume. better to use 150mm rod and pistons made for 94mm stroke. or like I am doing 147mm rod and 2.0 pistons


if you are building high rpm power 6000-9000 rpm a long rod is preferred.
if you are building a street car with power that hits at 4000rpm a short rod is preferred.

 

a 10.5:1 2.3 piston in a 2.2 makes the comp ratio around 9.5-10:1. perfectly acceptable for E85 use..