Hey guys. I was wondering what the best options were for replacing stock pistons?

I know there are other piston threads here, but all seem to be focused on more of a high horsepower build.

Also, would it be a bad idea to match aftermarket pistons with stock rods?

Thanks.

 

Stock compression ratio, will work just fine with stock rods. Just order the bore size you need.

https://www.extremepsi.com/store/pro...at=1587&page=1


Since the motor is apart I would spend the $350 or so on putting some eagle hbeams in it. Unless you really never plan on making more power.
https://www.extremepsi.com/store/pro...at=1339&page=1

 

The design or shall I say connecting mechanism is different for stock rods/pistons in comparison to aftermarket rods/pistons... so no you cannot attach an aftermarket piston to a stock connecting rod. Also I want to add that the stock connecting rods are the weakest point of the short block rotating assembly so you'd see no benefit there as stock pistons have successfully made 500-600 whp

 

Nowhere in wiseco's catalogue does it say you can't use stock rods. Its a 22mm pin like stock, it can be press fit into the stock rod by a machine shop.

 

Clearly you didnt comprehend my statement very well nor the OP's in terms of "matching" aftermarket pistons to stock rods..
The design in terms of the connecting mechanism is not the same as I mentioned (meaning it doesn't match)... so unless you do as you just mentioned, is the only possible way it can work and its usually done in reverse meaning connecting stock pistons to aftermarket rods and having it machined to work properly... Good Day...

 

OP, please dont waste your time utilizing stock rods...

 

Just to clarify, I'm not replacing my pistons because I want to. I was told they needed to be replaced but that my stock rods were fine. So I'm just not trying to waste any money if it's not needed.

Thanks.

 

For sure bro I understand,
What happened to the motor? is it low compression? or did something happen as far as losing compression completely, bearing failure, loose connecting rod?

 

Stock rods are press fit pin. The pin is still 22mm in diameter. You press the aftermarket pin into the stock rod.

 

Or better still use the stock pin instead of the aftermarket pin because it's stronger.

 

If all you are wanting is stock power get some stock oversize pistons. You'll have better oil control. More important is to know what caused the current pistons to fail and to correct that problem as part of the rebuild. Fitting new piston means boring the cylinders and there is a word for that and that word is overhaul.

 

He has an Evo 8, it could have 250k miles on it and simply needs to be rebuilt.

 

Something happened, it could be miles. Whatever, it'd be a shame to put her back together with a failed fuel system.

 

Do it right brotha.. get the best pistons and rods you can and do whatever else you need to do while your in there.