I was wondering the difference between the SRP low compression 16cc dish pistons and the J&E extreme duty low compression 28cc dishes.

So far all I can tell is the dish. Everything seems to be the same down to the compression height.

I was looking to run a high horsepower motor (around 800) and didn't want to take the chance of having it go due to something that could have been prevented beforehand.

So basically:

Is there a stength difference between these two sets of pistons?


I've looked around, and all I could find was that J&E said that the J&E's were better and, on an unrelated topic, more expensive.

I've got the rest of my rotating assembly sitting in my garage, and I've still got to purchase heads, so the dish issue really doesn't affect me that much.


Thanks,
Brett

 

the SRPs are a 4XXX alloy, and the JEs are a 2XXX alloy. the SRPs have more SI, therefor are more brittle. they allow tighter pistons to bore clearance, but are not good in a high hp(like yours) motor.

 

As Jordan said the two materials are different to start with. The lower Silicon pistons are more race oriented and are good for more heat and HP.

Also by looking at the weights of the pistons 425g (JE) vs 403g (SRP) they are also have a different structure. The JE's probably have a thicker deck which is there to handle more boost and power.

The JE's also have a 140g pin vs the 130g pin on the SRP's. If they are both 4340 (I know the SRP's are) then they are good for long term durabilty. If the JE pin is a Tool Steel pin then they are not as good for an endurance application because they wear faster.

My guess is that the JE pin is 4340. If so a 140g 4340 2.950" .927" pin will hold 800hp easy.

Last thing you want to do is hole a piston. Get the JE's

Bret

 

Thanks for the feedback guys. I'll go with the J&E's.

Brett