Evo 9 pistons on Eagle rods

[dsmtalontsi95]

There are a few threads on evo pistons but I want to make sure my set up is ok. I have a set of evo 9 pistons and a set of eagle rods. I want to put them to together and have a fairly nice bottom end. This is for a DD or weekend car. I'm not going to the strip ever weekend, maybe twice a year. I'm going to have an hx35 with 25 psi so I'm looking for about 400hp with room to grow. Now what exactly are the compression ratio's of these pistons in our motor (6-bolt)? I've herd the piston them selves are either 8.8-9 but with our heads with that piston is 8:1. The other thing is I hear some people say turn the pistons around in the block and some say don't, which is it? I did some searching but there is no striaght answer on these.

Chance

 

[donniekak]

You can't use the evo pistons on the eagle rods. The eagle rods are bushed for a floating pin, and the pistons are made for a press fit pin.

 

[dsmtalontsi95]

Ok, then is there a difference in people using after market pistons on stock rods? Is the pin situation different there?

 

[agentorange313]

Yes there is a difference. if you want to run evo pistons, you can use evo rods I think. Or 2g rods without modifying them.


most after market pistons are held in place by a full floating piston and snap rings

Evo pistons/dsm stock piston 1g or 2g have press in pistons. you need a mechanical press to get the pin out of the piston and rod.

 

[BogusSVO]

so you can se the diffrence...

this is how an Egeal rod is hug on a piston
http://www.dsmtuners.com/forums/cylinder-head-short-block/342138-how-fix-balance-hang-pistons.html

this is how the evo pistons are hung on a rod..
http://www.dsmtuners.com/forums/art...ss-fit-pistons-balace-rods-6bolt-1g-4g63.html

 

[TimF]

sorry for a thread revive, but I was looking into eagle rods on evo pistons and this is all I can find. So if eagle rods will not work with evo pistons, which ones will? or do I have to get a piston/rod combo to upgrade. I currently have 6bolt rods with evo pistons, already machined and balanced and installed on the block, but I read that 6 bolts are at there limit at 500hp, and i want to hold 500 and room to grow. I really cant afford for new rods and pistons

 

[JacksonAuto]

If you're looking for 500whp and already have Eagle rods then why go through the trouble of using stock pistons? Just get a set of Wisecos and be done.