GSC Power-Division releases R2 camshafts

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Apr 10, 2013, 06:13 PM

#121

JohnBradley

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Quote:

Originally Posted by ExtremeDSM

Very interested in these cams. 2.3, Black and Kelford 272's. Here is the info on my car: https://www.evolutionm.net/forums/ev...k-evo-9-a.html

I am looking for more power out of it but do not want to sacrifice any spool or torque. I think I may be stuck where I am at with cams but I have to ask as I am cam dumb.

It was a max effort build that we tested them in, but they were worth around 75whp over the Kelford 272 on a car that ended up making 750whp.

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Apr 10, 2013, 06:15 PM

#122

JohnBradley

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Quote:

Originally Posted by 03whitegsr

Any chance you have the duration @ 0.050" specs? Just curious how similar these are to FP5R cams and comparing 1mm vs. 0.050" doesn't seem fair. Based on the 1mm duration values listed for the GSC cams, it looks like the FP5R has slightly more duration on the exhaust side and maybe a little less on the intake. Considering they are reaching the same peak lift, I have to wonder how different the ramp rates are.

Code:

              FP5R / GSC R2
Lift [in]
Intake:      0.475 / 0.476
Exhaust:     0.466 / 0.469

Advertised Duration
Intake:        279 / 274
Exhaust:       285 / 274

Duration @ 0.050"
Intake:        233 / ???
Exhaust:       238 / ???

Lobe Center Line
Intake:        110 / 107
Exhaust:       114 / 115

I dont have the 0.050" values but I can tell you that they did make more power than the 5R in a 2.3 IX we did. Unfortunately it wasnt back to back, more same sized motor, intake, and turbo vs the R2.

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Apr 10, 2013, 06:44 PM

#123

ExtremeDSM

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Quote:

Originally Posted by JohnBradley

It was a max effort build that we tested them in, but they were worth around 75whp over the Kelford 272 on a car that ended up making 750whp.

What was the spool up difference and torque difference on that car?

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Apr 11, 2013, 09:13 AM

#124

JohnBradley

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It was a 2.0 VIII, it lost 300rpm from the Kelford 272 but made another 50 ft lbs. When we were full swing in the testing phase we tried to leave no stone unturned so we tried them in a 2.0 to see what the gains were and what the weaknesses were.

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Apr 12, 2013, 07:41 AM

#125

ExtremeDSM

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Interesting. I wonder what these will do for my setup? I can handle the hp gain up top, I could handle torque gains and I think I could sacrifice a little spool up to get more torque and hp.

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Jul 17, 2013, 09:17 PM

#126

Acree

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Aaron,

I hope you don't mind me plugging my thread, but my R2 cams for Evo 9 MIVEC are for sale here.

-Acree

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Jul 17, 2013, 11:09 PM

#127

Fireescape

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Got some news coming on these cams used on a stock block Evo 9 with 5041 springs/retainers and gsc seals. Just so everyone knows there where no valve/piston issues and retainer/seal gaps where fine. Tom at TSComp is tuning and at this early stage (two maps in) his comment was "wow", more to come.

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Jul 20, 2013, 06:05 AM

#128

supersnow

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I will installing same set up on a stock 2.0 next week and Tom as well will be doing the tuning. With a 71 HTA and open dump...it should put good numbers on 93.

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Jul 20, 2013, 08:40 PM

#129

talentsearch301

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Hey John or Travis
What cam will best serve my setup s2,s3 or r2

EVO VIII
Buschur stage 3 head
GT35 turbo
2.3 stroked
no longer driven on the street..for track purposes only

I thought s3 were the latest since "S" comes after "R" lol

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Jul 20, 2013, 10:38 PM

#130

Grimgrak

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IIRC S3 is for 2L so your best to wait for the R3

Quote:

Originally Posted by talentsearch301

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Jul 21, 2013, 08:44 AM

#131

nismo3183

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Aaron,
You guys are currently building my long block and I am up in the air on whether I should run S3's or R2's. My setup is as follow.

4G63 SLR 2.2L 153mm rod, 94mm stroke wiseco 1400 9.5 pistons
GSC cnc cylinder head with all the bells and whistles
BW EFR T4 8374 TS 1.05 A/R with all full race hot parts

I think my motor should be done in the next 2-3 weeks as Myles said he just received a batch of blocks from the machine shop so I believe time is running out.

I was originally going to go with S3's so that I could take advantage of the high rpm capability of my block as well as the increased air flow of the GSC cnc cylinder and 79lb/min turbo.

Besides telling me which is the better cam choice, could you give me possible pros and cons for either choice on my particular motor setup??

Last edited by nismo3183; Jul 22, 2013 at 01:29 PM.

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Sep 26, 2013, 10:38 PM

#132

klever

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hey nismo which cams did you go with?

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Sep 27, 2013, 09:33 AM

#133

JohnBradley

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According to the invoice it looks like S3s.

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Apr 9, 2014, 08:38 AM

#134

khmerpimpin

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Quote:

Originally Posted by JohnBradley

According to the invoice it looks like S3s.

I have a similar setup to nismo, but I have a 2.0, I want to run r2's, but I want to know your opinion as to if it would be a good idea?

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Apr 10, 2014, 04:41 PM

#135

JohnBradley

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I would base it on powerband more than anything. The R2 should be pretty close to the S3 as far as peak power but will develop it sub 9000 where the S3 works better in cars that rev.

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