Tracer

So I had my GSC Stage 1 cams installed at Topspeed in atl. (great place!) first impression sounds like stock idle, very smooth if that's an issue. Now to the dyno, I only made about 9 whp and 13 lb ft. of tq., now here is where it gets interesting and some of you gurus can help with this. My car made over 20 pulls because the first 12 were with bad gas, damn. So we had added some shell 93 octane and did around 11 more. Well here are the factors and created such a low gain at least in my and their eyes. At least 20 degreese hotter (86), twice the humidity, and heat soak, Scott said my water temps were really high. Now these numbers are at 23lbs of boost tapering to around 18lbs. there is zero knock and I believe afr's were 11.7 or so at idle and 14.5 or so under boost those are what I think he said, in other words everything was exactly where it was supposed to be. Now to driving impression, butt dyno was outstanding it pulls very very hard I could def. tell a major difference so I was very pleased with that! Now I know dyno numbers are for some people bragging rights, all I can say was I really don't have that many mods and this was in the south in 86 degree weather so even though I expected higher numbers I realize that those 3 factors play a major role in what is produced, fwiw they dynoed much better that cossi's 272's on a similar 9 MR the day before and the power came on much stronger much sooner. I am very glad I went with the GSC's, gues the only thing I need now is an intercooler! This was on a DYNOJET as well.

alicea8541

iTrader: (32)

Just wanted to say you have your AFR's listed in the wrong order. Should be 14.5 at idle and 11.7 under boost. I have these cams too and they have impressed me since day one.

recompile

iTrader: (38)

The heatsoak probably did account for some of it.

1) S1s are not very aggressive
2) You have a IX, the stock cams are very well suited to the stock turbo

Peak HP changes are not what upgrading cams is all about... you want to get a stronger powerband with gains across the entire RPM range, not just peak. If you post a comparison of the two runs on top of each other, we can see if the cams helped the entire powerband or not.

I made a smooth and strong 328whp on a Mustang dyno on stock turbo, stock cams, stock O2, and Shell 93... IMHO there is no reason to upgrade cams on the IX until you upgrade the turbo

The fact that you said your car dyno'd "much better than cossi's 272s on a similar 9" leads me to believe the tune is lacking in both cases, moreso on the other car.

Neuspeed06

Agreed. Ive been looking at cams also for my IX (Still on stock turbo) and been told the same thing. So I probably wont spend the $1000+ on cams for a minimal 10hp gain.

Tracer

It's not so much the hp #'s but how the car does pull on the street across the entire powerband, besides the inital tune it's probably the most noticable mod yet, don't regret doing them at all because my biggest complaint was after the inital thrust if you will of the car it slowly would go away, not any more hence the tapering of boost, it just pulls a lot harder and much longer

sabastian458

iTrader: (25)

Good numbers, and glad to see another Evo guy in the area!

Now it is time for some exhaust work Buddy of mine made right at 350 whp on the older GSC 272's and stock turbo (evo 8)

BBS

iTrader: (18)

well said!

wshihdnevo

iTrader: (88)

s2's, cosi m3's would be what I would go w/ even on a stock turbo on a IX. Just from seeing dyno numbers on both. Glad you are happy w/ them as I will eventually be upgrading to s2's this winter.

Tracer

Yeah I could have gone with the S2's but my next mod will probably be an ets intercooler with pipes, that being said once those mods are installed I will retune and then do some suspension and some real track time with professionals. Next maybe the poss. hta green, S2's and valvetrain, with an aem setup.

Hikaru

iTrader: (3)

Our cars are almost exactly the same. Same model, color, springs, intake, hallman, walbro,different tbe but they are pretty much the same. Only thing different is you got cams and o2 housing on me. I was tuned at Topspeed as well by Scott and few weeks back. Great shop by the way. He pulled out 322hp and 309tq. My question is this...is it worth it in your eyes to get the gsc s1's and a 02 housing or should I just save up money for the green? Would the power the green makes alone eclipse the power added by the cams and o2 or do I need the green with the cams to really notice a decent power increase? Basically what would net a bigger power increase; the cams and 02 or the green by itself? Nice ride by the way but I'm a little bias...

wshihdnevo

iTrader: (88)

Prob the cams over the turbo. Or just get the cams and the green.