I see...I guess I misunderstood the situations. I will leave this topic to the experts.

 

No worries I am sorry if that came across as rude, but I keep hearing that in the Chris' thread as it is. There are other reasons that it is down on torque compared to other cars the same day, but its still up from where it was...290 in January to the 314 or 324 it is now.

 

yeah, it would also be interesting to see what a staggered setup w/ the gsc would look like, power wise. S2 intake cam, s3 exhaust cam...?

 

i've seen a comparison of the S2 vs S3 on a 35R and i think the S3 is too large for that turbo. So you can figure out what i would say about a stock turbo on the S3.

 

Greg there is a reason i didn't pm you and ask this question. I knew what your answer would be before i even thought of the question

 

Which cams are bigger, S2's or BR 272s?

 

^depends on what you mean by big? Duration or lift or overall cam?

 

All of the above. Can anyone list the clear measurments to these cams?

EDIT:

GSC S2s -217 intake and 217 exhaust, duration at .050"

Jun 272s -225 intake and 226 exhaust, duration at .050"

HKS 272s -208 intake and 206 exhaust, duration at .050"

 

i have them for the s2's:


FOR EVO VIII
S2 Specs gsc-6008S2
Intake 274 Duration 11.2mm peak lift, 107 degree Centerline
Exhaust 272 Duration 11mm Peak Lift, 113 degree Centerline

FOR EVO IX
S2 Specs gsc-6009S2
Intake 274 Duration 11.2mm peak lift, Variable Centerline
Exhaust 272 Duration 11mm Peak Lift, 115 degree Centerline

 

They are also not recommended on stock head.

 

Be aware that a big exhaust cam that opens the exhaust valve early will kill spool and bottom end torque on a stock turbo. The engine dynamics on stock style turbo are not conducive to early exhaust valve opening. The loss of cylinder pressure from the power stroke outweighs the reduction in pumping losses. I'm not sure you'd see much of any gain going from an S2 to an S3 on a stock turbo, but you might lose a bunch on the bottom.

 

someone needs to just put a set on there 9 with a stock or fp green turbo. all we can do is assume what will happen but untill they are on the car and on the dyno we will never really know

 

It's like some people with ls1's who way overcam their stock headed cars, and could've made similar peak power with a 224 and gain huge midrange.

 

I will try and talk JohnBradley in to throwing a set in his car to test it out, I don't expect big things i am just curious to see what the powerband looks like.

 

What would you guys recommend, the cosworth m3s or smaller? I was impressed with the gains and im thinking about getting them....would love to get some advice on whether i should get them or not or smaller.