ShapeGSX,



Thanks for the input and info .

 

If I had 1500 to have Pipers put in I would love to go this route, too bad I dont...yet

I have a question for anyone who can answer it with some technical info:

Are there any downsides to running the Piper rally cams on an almost stock motor? I have intake, exhaust, fuelpump, MBC@20psi, dynoflash.

thanx guys

 

i would get headstuds while your head is off....

i'm going HKS 272s with HKS cam sprockets and ARP headstuds.... i'm gonna spend >$1500 turn key...

 

just curious. if one were to get jun cams or any other cams that require replacing the stock valve springs and retainers, any brand springs/retainers would work fine correct? i dont have to buy jun springs/retainers to run jun cams right. cuz i have bushur springs and retainers with my hks, but now im possibly thinking of selling them for something crazier.

 

I recently trapped at117.88mph with 272/264. That was with my grindy tranny that is through now. I'm sticking with this combo no matter what is said. I truely think it is a matter of preference. I will say that everyone who has been in my car says that they want my combo. It hits hard, very hard.

Matt

 

^i think that is the first trap speed i've seen with this combo

 

I say 272/264... Just remimber, the turbo can push 21 psi, the piston can push over 100 psi. Flow counts for a lot, but for a stock head go big on the intake.

 

Which are the most expensive cams?

 

I agree. HKS is a pretty serious tuner. They reccomend either straight 264s or 272s, I think everyone shoudl just pick one instead of mismatching and doing silly combinations.

 

I don't know how other combinations or 272/272 cams will work but here you have the results from my car before and after inserting of HKS 264in/264ex cams.



As you can see - 264/264 are is good for street. You have power/torque gain at full rpm range begining of 1900rpms - so before turbo full spool up.

 

That's hard for a sane man to argue with on a daily driver...

 

Right, because experimentation will get you nowhere. Just do what everyone else does, that will make your car faster than everyone else for sure!

Experimentation and figuring out what works best is what makes your car faster than someone else's.

I ran 11.82 @ 117.55mph on 272I/264E in October. I have an Evo III 16G on my Eclipse with a 1G DSM head and 1G DSM intake manifold. My car is 3315lbs with me in it.

This winter, I'm going to experiment with a cyclone dual runner intake manifold. Lots of people say it isn't worth it, but most of those people also haven't tried it, and are just regurgitating what they heard before. Go figure.

 

And just because you ran a good time with that combo doesnt mean it is any better than the straight combinations because you have no comparisons!

The point I was making is that if there was more power available with a different combo I would THINK (not necessarily true) that HKS (a serious tuner) would look into those possibilities because that is WHAT THEY DO as a company, make aftermarket parts to make MORE POWER. I wasnt knocking different combos.

 

You are talking to the wrong guy. I've run 264/264, 264/272, and 272/264. I ran all of them this summer. I swapped them about every 2 weeks. I have datalogs and plots of airflow and airflow/rev and boost in excel.

So I do have comparisons. With the 16G turbo, however, I didn't find much of a difference between those 3 combinations of cams at max boost. At lower boost, there may be a difference between them. I may try 272/272 next year sometime.

If HKS only recommended 264/264 and 272/272, don't you think they would sell them as a set instead of individually?

 

Well you stated no where you made comparisons so I really couldnt have known that. You only stated the time you ran with a paticular set-up.

So you like the 272/264 combo best? I read the article AMS did on the cams, seemed my favorite was the straight 264s. The straight 272s had 7ft/lb less tq and just +1hp. I want to have MAXIMUM torque. Was your time of 11.8@117 on race gas or pump and what boost? That is a good trap speed.