Next time you're in California take time and tour CP's facility. It's quite nice. Just so others and you know. CP does indeed have a research and development department. I've put both CP and Wiseco pistons through Hell at 800whp - 1000+whp. Also have close friends of mine making or made 1200+whp with CP's

 

^^ why dont you be the first to build a 600hp spelling/grammar checker and test that!

 

no one said they tested all pistons. the point i was trying to make before you got your panties in a bunch was that anything can break. Go with whatever makes your balls tingle. I don't care. lol. No luck needed on my build...

 

wow how hostle...

well cp I think is for hondas and fox bodys I build this man
but its cool exept for the panties blah.Not a nice thing to say bro.especially if you dont know me.One advice forums can some times miss lead you,trust your self and spend some times with actual pro builders.Then youll see theres no need for this.life its all about connections go out and find them.I dont need sht from here man.Just trying to help

 

Ive heard JE makes some of the best pistons but they are quite pricey.

Also its all in the tune.

 

I have had the closest tolerances between boxes with CP.

on multiple occasions i've had each of the four pistons for SR mic out to be 3.4025"

you don't get that with wisecos, ever.

 

i'm going to elaborate on my experiences with both


first motor i ever 'built' burned up with a wiseco. itty bitty motorcycle engine.

my dad's 2 stroke bikes all gave him hell with wisecos also. they expanded too much and stuck compared to whatever other brand he was using.

with SR's theyve been nothing but great. However we had to put two more crush washers in because they didn't clear the oil squirters originally.

CPS's get really hot around halfway down the piston, and they expand a bunch. moreso than the wisecos. i think the cp you're going to have to run a half a thousandth, maybe a thousandth more of piston to wall clearance. I think i'm running .0035" on my engine now. that's the same i ran on the enjuku engines that I built and never had piston trouble with them. one of them is STILL RUNNING TODAY (built in april 2005, for the record)

either way you're doing great. i'm sticking to cp's however, with titanium wrist pins.

 

all TR BS aside. teach me how to build better.

 

.lol.have you seen them put it in a motor like yours and test it? and I say it one more time. I dont know what kind of engine were talking about here.so how can you say witch pistons to use? if its a sr20 dont waist time couse it can take that power stock if its a ka24 then yeah go for cp or whatever any fcking forged pistons will do for that mark.300hp was it?people here have research more on pistons then this companys.

 

Mattback knows this stuff. So does Enthalpy, but he doesn't post ever. Where's Martin? Those guys probably have the most experience locally. All of them will tell you that in our applications the CPs and Wisecos are both good choices.

For the record, CP recommends .0035" wall clearance. Wiseco recommends .0025" clearance. CP tolerances are super consistent. Even their ring packs; if you bore to .0035 clearance, the rings will come out dead nuts on for the recommended gap. My Wiseco's had a little bit of a variation, I think it was .001 to .0015" overall. It shouldn't matter because you should be match boring your block anyways.

And I don't get where 4g-bs-tard gets off saying what companies do their own R&D. Lets sumaraize his analysis: All US companys suck and don't do testing. All Japanese companies rock and do extensive R&D. That just seems like a longwinded way of saying OMG JDM. The truth of the matter is that a lot of Japanese companies contract internals out to US/Euro companies. For instance, it's a public fact that JUN pistons are made by Cosworth. In the end all pistons do is sit behind combustion at xxx temp and xxx pressure and push on a rod/wrist pin. If your engineering department is so bad at deisgning pistons that you need to do exhaustive in house testing for every single piston diameter/dish then you have no business selling them in the first place. Man, if only there were some sort of software that would allow me to run simulations and FEA... I mean, SR pistons can't be anything like ECOtec pistons, or K-series piston, or any other piston on earth... /sarcasm. As many pistons as Wiseco and CP sell each year for SR and KA, and how well they work, it'd be rediculous to assume that they've never seen them in operation at their own facility. Grow up!