ohmohm

iTrader: (3)

I'm considering between these cam to be use in my car.

I've been searched and found that a lot ppl recommend GSC S2 but for now I can't afford the springs and retainers but S1 can use stock.
For Tomei, I can't find much info about them. And for HKS, I've looked at the AMS cam test topic and found that it gives quick spool and no bottom end loss. So which one gives the greatest gain?

FYI, my car is 8MR and it's completely STOCK except the HKS silent hi-power catback.

I'd like to have rough idle.

Please help me on this.

THANKS!!

ohmohm

iTrader: (3)

Please, I need your help!

hiboost2.0

iTrader: (15)

s2 will give you more power and a bit of a rougher idle if that's what you're looking for. s1 are a great cam though.

foxbat

I also need cams w/stock turbo, did some research (not extensive) As result, I decide to go with S1s. Anything with a higher angle won't be of much benefit with a stock turbo, plus, with the S1, I don't have to replace valve springs/retainers. The HKS are good cams, but not enough to justify the extra cost.
You won't get a rough idle with anything less than 272, but you could attempt doing that through ECU tuning.

EvocentriK

I use Tomei 260's. Quite smooth idle but with cam gears you can increase overlap to induce the rough idle if that's what you want (I do not like rough idle/stalling problems but you might). Gains in spool, gains in midrange, and added significant torque higher in the rev range all the way to redline. Some nice power gains everywhere too.

The stock head ports can't flow any more than ~10.5mm lift on the intake and ~10mm lift on the exhaust, so gains with cams/different cams are mostly from duration over 1mm lift. The Tomei 260's are quite aggressive for low duration cams with duration at 1mm: I = 215.5 / E = 214.5. The HKS 272's duration at 1mm: I = 214 / E = 214

If you want rough idle out of the box, HKS 272's will do it, the S1's will do it but not so much, and the S2's idle quite rough.

ohmohm

iTrader: (3)

So from now my choice will be between Tomei 260's and S1's. Can anyone compare between these two cam?

And do I need to change the sprocket?

Thanks a lot!!!!

STLEVOIX

iTrader: (17)

i like my s1's. No exp. with Tomei.

ohmohm

iTrader: (3)

What is the gain from S1's? And do I need to change sprocket cams?

ohmohm

iTrader: (3)

For S2's, do i need to change sprocket? I do search and read in the forum and found out that S2's is better everywhere. So that means no loss in low end and spool, right? I probably go for S2's by now.
Please help!!

AreSTG

iTrader: (4)

as someone else said, if you get sprockets you can adjust the cams, and give yourself that rough idle you want. Hell, i bet you could just buy sprockets on stock cams and get yourself a rough idle, lol.

no you don't need sprockets.

sparky

iTrader: (1)

No need for adjustable sprockets with the S1's. Very smooth idle. Works with stock springs and retainers. Very good turbo spoolup.