I would like inputs on Cams vs. pistons (compression increase) to pull more power from our motors.

Pros / Cons on both?

Reason I ask is because I have bad oil rings and since I am in there I will be putting in CTR pistons. This is only costing me ~$250 for the pistons, and ~$500 for a quick bore and assembly.
I know a person who spent thousands trying to get his Spec B's to put out a "measly" 192 WHP.. when I spend a fraction of that and should be doing ~200 whp with no tuning. (a simple FPR and ECU)

Am I missing something? Or is it because high compression isnt (as) streetable?
*but dont tell SgT that!*

Thanks.

 

Hey I am running CTR pistons and CTR valvetrain, cams too. haven't had time to tune it and I haven't run her hard so I haven't seen a diff obviously. Compression is about 12.1-12.4 depending on gasket layers and overall setup...

 

Might be off topic ...

I recently added some 12:1 pistons (not 81mm bore though. haha) to my GSR cam'ed motor.

I would do this route again than running Toda "B" to a STOCK bottom end.

 

Well, since you have bad rings and are already down there, i'd get new pistons

but for higher compression cams would solve that by putting more air in (you know this ) and just getting pistons and total sealed rings, with higher CR pistons would just push up the air already in there, and ITR's have big time compression on pump gas.

just my $.02

get some new rings and cams
your CR is good, just throw some more air and up the FPR a lil

 

My point is

Why would people waste time and money on cams.. if I can make MORE power on just cheap pistons?


I already am JUST getting CTR pistons.

 

cams are alot easier to install then putting new pistons in

 

Cams
High Compression

They are both lovely

Cams are easier.

Miguel

 

ahh.. so thats it? heh

 

Hey, I think I know someone that did the same thing...

 

i make 179whp with ctr cams and a mugen head gasket, 12.5 cr on pump gas, just because you make high compression doesnt mean you make high hp, but your tq increases as well

 

I make that now (JDM header and no exhaust)I think you got problems bro..

 

ouch.

 

Damn...where was I during your 179 whp dyno pull??

 

you got a C5 he prolly has a C1 that may be the difference

 

bah.. 176.. 179 its all noise..

LOL.. soon Ill be saying I made 188 bone stock!!!

 

Increasing compression alone really shouldn't give huge increases in power, although the increases should be across the board and engine response should be crisper.

Me? I'm a fan of stock cams anyway, so I'd rather put in some pistons, especially considering that the cost works out to a little less than aftermarket cams.

 

Why not both? They both work great together.

 

MY point was I spend $600 for 200 WHP and a friend pays $5000 on 192 WHP

 

600 for 200whp? sounds a little optimistic to me

 

Yea..

let me add it up..

$500 for assembly and .25 bore
$250 for pistons
$100 for FPR
$700 Used Mugen ECU
$300 Harness (only because I am too lazy to make it myself)


hehe.. not $600 but.. still no where near $5K...

 

You can make 200 WHP in an ITR with CTR pistons alone? If not, what else do you got?

 

Ill be using a Mugen ECU. open exhaust, Mugen gasket, and an FPR.

I already have a JDM ITR header.
I was also told that running 60psi on the FPR will cause premature wear on the o-rings... maybe Ill get injectors.. but thats not needed.. right away.

Cam gears might be needed to "smooth it out" but I am not going to worry about that..

I only care about 6000 RPM and up!

 

ive got a c5, i doubt youll break 200 with ctr pistons without major tuning on stock cams

 

If you made 178whp with your ITR pistons, i highly highly doubt your gonna pick up more than 5-10whp with higher compression pistons. You need the high lift cams and a free-er flowing head to make 200+whp. I just think your thinking to optimistically without adding any more performance enhancers. Also remember that if compression is to high, you may get detonation on pump gas. It will take a bit of tuning to get the good power without detonation on pump gas. You can hit 200whp on ITR cams, but based off previous dyno #'s, its gonna take you quite a bit of tuning to acheive that. I just recommend not setting your sights to high that you are disappointed if you don't acheive those numbers.

 

how much power do you think you're going to get from measly ctr pistons that will detonate your car????
hmmm...
ctr pistons are prone to detonate = true facts that i have seen