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GSC S1's ROCK!!

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Old Sep 5, 2007 | 01:01 PM
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Cool GSC S1's ROCK!!

Hey gang,
Quick review on these awesome cams (latest batch, so I think the exhaust cam is similar to the Evo IX S1's), with the dyno plot first:


These were tuned and installed by IVEYtune.com, so I'm not sure how they install went, but I had head studs done at the same time (ARP).

They idle like stock, no noticeable lope at all - however, I have the stock exhaust components, so that may muffle the note. I asked A LOT of people on these boards about their take on these cams, and I had mixed opinions (some said there was a noticeable lope, others not, etc.)

No one would be able to tell I had these cams in they idle that well, and the mid range power is OBSCENE!

Sean had to increase my idle to about 1100rpm (on the TB) since when I would depress the clutch after a quick pull (like coming to a stop sign), the idle would dip down to 500 rpm and I didn't want to deal with stalls.

Besides an occasional rpm-search, these cams OVERdelivered on performance - I surprised Sean Ivey with such a minimal list of mods (DP, FMIC, and these cams are all the power mods on here!)

Thanks GSC!
Old Sep 5, 2007 | 01:14 PM
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Wow. After all this time, somebody finally gets a dyno pull with an EVO 8 and the S1s and posts something. Good numbers!
Old Sep 6, 2007 | 10:16 AM
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From: vegas baby....
I luv ma s1's........
Old Sep 6, 2007 | 09:45 PM
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Why dont you put a full exhaust on. A fmic and cams really wont shine to full potential without a full exhaust.
Old Sep 6, 2007 | 09:50 PM
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Originally Posted by 8thWonder
Wow. After all this time, somebody finally gets a dyno pull with an EVO 8 and the S1s and posts something. Good numbers!
I posted up my dyno sheet with GSC S1's. Just look for it.

Originally Posted by dbsears87
Why dont you put a full exhaust on. A fmic and cams really wont shine to full potential without a full exhaust.
+9999999

You could have those Dynojet #'s with a TBE and no cams. You didn't follow the ideal mod path. You really need a testpipe and catback. Good luck.

jason
Old Sep 6, 2007 | 10:53 PM
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Originally Posted by dbsears87
Why dont you put a full exhaust on. A fmic and cams really wont shine to full potential without a full exhaust.
I agree those are good numbers, I can't believe it made that much power on the stock exhaust. Definitely invest in a nice 3" turbo back. That will really let that engine BREATHE.
Old Sep 7, 2007 | 12:10 PM
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Great results, do you have your A\F at the bottom of the dyno graph?
Old Sep 7, 2007 | 12:27 PM
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Exclamation

Originally Posted by kduncan01
Great results, do you have your A\F at the bottom of the dyno graph?
yup, A/F's were mid 11's throughout, it got cut off in my excitement from taking the picture. . .I'll post the picture up shortly and added it up. . .

I'm going through different vendors and trying to figure out what's the best $$$ for a cat back - looks like Megan is the cheapest and best sounding. . .

As a disclaimer, this mod path was off set by my own personal underlying reason of using the Evo as a daily driver 50+ miles a day! I attempted to work on the intake side of our car (FMIC, LICP, cams) and not tinker with the exhaust really. . .but it seems like EvoM peer pressure is "forcing me" to go the other way. . .=)

I'm going to get dynoed on a dynaometer (like I did stock) after Ivey retunes my cat back so I can get a real assessment on how much power I gained. . .I doubt I'll take it to the track and see the "real world" power since I can't afford to abuse a DD.
Old Sep 7, 2007 | 06:45 PM
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GSC is good stuff.

Fujitsobo is quiet and decent power.

Sean
Old Sep 11, 2007 | 05:21 PM
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I have an RSR exmag for sale that would be awesome for your car..It looks alot like stock and is one of the quietest..Look in the northeast for sale section..

BTW good numbers, I just installed GSC S1's on my evo8 myself..
Old Sep 11, 2007 | 05:41 PM
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Originally Posted by Cali2MDevo8
I posted up my dyno sheet with GSC S1's. Just look for it.
+2.

I still have not seen a back-to-back comparison against HKS 272's or something similar. I know there was a review on here showing better lap times, and I know Nils says they feel better...but still no back-to-back anywhere.

FWIW, here is my 91 result again:



AFR & BOOST:

Old Sep 12, 2007 | 01:16 PM
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S1 nation represent..lol I got S1's as well..
Old Oct 2, 2007 | 08:32 AM
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Just an update with a turbo back installed and the AFR's as someone had requested:
Old Oct 2, 2007 | 09:44 AM
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damn son i need to get these NOW!
Old Oct 2, 2007 | 10:59 AM
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bump for my cams



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