I'm not an expert, but I'm satisfied with my purchase. I would definately recommend them for all stock turbo'd evo's.

 

^me too. Def don't need 280 to make power with a stock turbo. I have heard of several people running the S2's on the stock turbo with great results too. At least this gives you more options down the road.

+do some research and the GSC cams outperform the HKS hands down. The real power for us is due to the lift and not so much in the duration of the cam shaft.

 

go big or go home I say, why pay again when you want bigger cams later?

 

How do you like your Comp 280's? I almost went with those, but I am planning on staying with smaller turbo and changed my mind last minute due to good deal.

 

I love them, based on the info I read here they make more power then hks 280's for over $100 less.

 

Not everyone plans on going bigger though. Even if so, I beleive the S1's still perform really well on 30r's and even 35r's.

 

how about cosworth 272???? i have a IX and wondering which one is better the gsc s1 272 or cosworth 272???.......i dont mind the rough...sounds nice to me....

 

yes, I know s1 is samller cams, but smaller cams are meant for smaller turbo to produce maximum gain, yes, if you have gt35 with S1 cams, it will restrict flow to the engine, but people I talked to with S1 cam on stock turbo, they all have great torque gain and hp gain.

according to your HKS 280 cams graph, it shows there is lost of low end between 3k to 4k rpm, only the S2 graph shows no lost of low end.

 

I never really understood that, smaller cams are for small turbos. Wouldn't it make more sense that smaller cams are intended for people who want to keep more low end TQ? I thought bigger cams just shifted the power curve and created more top end HP in almost every situation.

 

you are right, smaller cams provides more lowend torque and bigger cams shift the power band to the right. since smaller cams gives more low end torque then it will result in faster spool. when you match the right cams for right size turbo = fastest car.

 

Okay then this goes back to what I said earlier, why pay the same amount for less power? Whats the motivation to get less aggressive cams? (sorry to get OT but I think this is relevant to the OP's question) I'm making 90% of my tq at 3700 rpm on comp 280's which are about as big as you can go on stock valvetrain. IMO that is pretty decent for stock VIII turbo, I cant imagine anyone asking for their torque sooner, why get small cams?

 

the runs were started at different RPM's (I mentioned that and it's obvious)

 

HKS 280's FTW, drop in, straight up. No cam gears needed, no valve-springs, etc.



Search for other posts I've made for more info.

 

yep, gotta love that. unfortunately it's going to take time to change the minds on evom...there's alot of bad theories on here about many subjects. Most people simply regurgitate what somebody wise once said and have no data of their own to support it.

 

for what it's worth I shift at 8k with the HKS 280's to 2nd and 3rd and hold 4th to 8500 with the stock springs and retainers. It isn't recommended for the valvetrain or bottom end of course