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Old 03-04-2017, 06:08 AM   #1
aprnsk
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Default What cams better for 500whp?

Hello,

quick specs:

EJ207 jdm
BW EFR7670 TS 64lb/min turbo (analog is GTX3076)
Rev limit: 8000

Want to install cams for DD and sometimes Drag.
Thinking about:
1) Kelford v2-199-B 264/260 lift: in 10.7/ex 10.2 duration: 225/222
2) GSC S1 268/266 lift: in 10.8/ex 10.4 duration: 225/224
3) GSC S2 272/272 lift: in 10.8/ex 10.4 duration: 230/230
4) RCM1570 268/260 lift: in 10.9/ex 10.41 duration: -/-
5) BC631 S2 266/268 lift: in 10.16/ex 10.16 duration: 220/222
6) BC632 S3 274/278 lift: in 10.84/ex 10.84 duration: 230/230
7) Kelford v2-199-C 272/268 lift: in 11.3/ex 10.5 duration: 232/228

What is better option? Maybe someone tried it? Describe the difference in behavior. Currently installed standard cams. I am satisfied, but I want more power.
And what different between (2) and (3). They all have same lift.
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Last edited by aprnsk; 03-06-2017 at 02:02 PM.
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Old 03-04-2017, 02:13 PM   #2
Nick411
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Stay away from the GSC cams for the JDM stuff, they are poor quality castings and have a history of breaking. They have only gone to the billet cams for the USDM stuff. Look into the Roger Clark Motorsport cams, you're not going to find a higher quality cam for the JDM motors.

The difference between the GSC S1 and S2 cams are the duration they keep the valve open.
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Old 03-04-2017, 07:56 PM   #3
subaru_gc8
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if you have a 207 why dont you get the tomei poncams?
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Old 03-04-2017, 09:22 PM   #4
Strider327
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Quote:
Originally Posted by subaru_gc8 View Post
if you have a 207 why dont you get the tomei poncams?
This! Tomei cams if you can afford it.
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Old 03-04-2017, 09:37 PM   #5
subaru_gc8
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I was told that the tomei time attack car runs these and they have about 500ish
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Old 03-04-2017, 11:15 PM   #6
BlueBlur211
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Off topic but, how do you like that turbo? Looking into the 7163 myself..
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Old 03-05-2017, 07:41 AM   #7
aprnsk
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Quote:
Originally Posted by Nick411 View Post
Stay away from the GSC cams for the JDM stuff, they are poor quality castings and have a history of breaking. They have only gone to the billet cams for the USDM stuff. Look into the Roger Clark Motorsport cams, you're not going to find a higher quality cam for the JDM motors.

The difference between the GSC S1 and S2 cams are the duration they keep the valve open.
Thank you I've added RCM1570 to the list of consideration.
Quote:
Fast Road - Inlet 268 Degrees Duration 10.90mm Lift - Exhaust 260 Degrees Duration 10.41mm Lift
Excellent specs, but there is no feedback.
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Old 03-05-2017, 07:52 AM   #8
aprnsk
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Quote:
Originally Posted by subaru_gc8 View Post
if you have a 207 why dont you get the tomei poncams?
tomei cams - piece of **** imho for jdm sti v8. On reviews they give too little. Stock cams has lift 8.9/9.6.
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Old 03-05-2017, 08:20 AM   #9
aprnsk
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Quote:
Originally Posted by BlueBlur211 View Post
Off topic but, how do you like that turbo? Looking into the 7163 myself..
Very like, great turbo. After Kinugawa TD05-20G spool up is same.
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Old 03-05-2017, 09:53 AM   #10
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Quote:
Originally Posted by aprnsk View Post
tomei cams - piece of **** imho for jdm sti v8. On reviews they give too little. Stock cams has lift 8.9/9.6.
they also have the pro cams
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Old 03-05-2017, 12:48 PM   #11
aprnsk
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Quote:
Originally Posted by subaru_gc8 View Post
they also have the pro cams
what is specs?

Quote:
Product: Camshafts Procam - EJ20 GDB
Part Num: 142201 : (250: 9.6 : IN)
Part Num: 142203 : (256: 9.8 : IN)
Part Num: 142213 : (260: 9.8 : IN)
Part Num: 142202 : (256: 9.8 : EX)
Part Num: 142204 : (264: 10.0 : EX)
If we take tomei procam 260/264 lift 9.8/10.0. Stock lift is 8.9-9/9.6. Read above - give very little.
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Old 03-05-2017, 03:15 PM   #12
Paul
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When I was looking into cams for my V8 EJ207 I was leaning towards BC. Dustin is on here and was very helpful plus their pricing was the best out of all the big companies.
For your goals I'd run thier stg2
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Old 03-05-2017, 04:00 PM   #13
aprnsk
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Quote:
Originally Posted by Paul View Post
When I was looking into cams for my V8 EJ207 I was leaning towards BC. Dustin is on here and was very helpful plus their pricing was the best out of all the big companies.
For your goals I'd run thier stg2
Stage2 that is BC0631 266°/268° lift 10.16/10.16.
Kelford 264 or RCM 268 are much better. I really think about that two cams.
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Old 03-05-2017, 04:01 PM   #14
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A machine shop that built my block recommended I run the gsc s2 cams in my ej205 heads, they mentioned having very tight tolerances and a good overall build quality. They were recommended over crower but didn't have an issue with me choosing crower. I would look at the duration specs and not just lift when you are considering cams. You can also always run larger diameter valves.
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Old 03-06-2017, 10:44 AM   #15
Paul
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Quote:
Originally Posted by aprnsk View Post
Stage2 that is BC0631 266°/268° lift 10.16/10.16.
Kelford 264 or RCM 268 are much better. I really think about that two cams.
Why are they much better?

It is hard to compare the specs on the cams since they arnt rated the same way from all the manufacturers .
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Old 03-06-2017, 01:17 PM   #16
aprnsk
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Quote:
Originally Posted by Paul View Post
Why are they much better?

It is hard to compare the specs on the cams since they arnt rated the same way from all the manufacturers .
I read someone put BC Stage2. After going to Kelford 264, which has more perfomance.

Now I leaning towards RCM1570 268/260 or Kelford 264/264. There are real owners with such cams? Quality and results?
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Old 03-06-2017, 02:15 PM   #17
stu
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I've had Bc 272 for 7 years now and I really can't complain. Ever since I got them they have been put down on this forum, but they are the only ones who didn't have a rash of failures like GSC, kelford.
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Old 03-07-2017, 02:49 AM   #18
aprnsk
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Yes BC 272 Stage 3 has good specs
Quote:
BC632 S3 274/278 lift: in 10.84/ex 10.84 duration: 230/230
But someone said that they have a similar level of power with the Kelford 264/260. Not evil cams, but specs is good.
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Old 03-08-2017, 06:54 PM   #19
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BC 272/272 are good
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Old 03-13-2017, 11:56 AM   #20
aprnsk
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I consulted with specialists on shafts. Now I leaning towards GSC S2 272/272.
Really, there are no problems with them.

UPD
Bought GSC S2. Thanks all.

Last edited by aprnsk; 03-14-2017 at 01:44 PM.
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Old 06-17-2020, 02:56 PM   #21
grangepack2
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Quote:
Originally Posted by aprnsk View Post
tomei cams - piece of **** imho for jdm sti v8. On reviews they give too little. Stock cams has lift 8.9/9.6.
A few years late... but I'm looking for drop in cams for the ej207 V8 heads. Aiming for 600whp. Should i keep the stock cams?
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Old 06-17-2020, 04:05 PM   #22
ripman
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When you read the duration specs keep in mind that manufacturers measure duration at different lift. i.e 0.040 and .050
BC for example, measures at .050 and kelford at .040". I measured my BC's which are advertised at .050" using .040". It added 6 degrees to the .050 measurement.
So if you measure a BC with advertised 222* using .040" it gives you 228*. In comparison to a Kelford of the same spec.
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Old 06-18-2020, 05:00 PM   #23
subaru_gc8
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Quote:
Originally Posted by grangepack2 View Post
A few years late... but I'm looking for drop in cams for the ej207 V8 heads. Aiming for 600whp. Should i keep the stock cams?
if you get 272 I think they will shift the rev range too far to the right.So thi si what I have figured out with my car. this is with a 2.1 with v9 heads
stock cams power stars at 3000, it fell of a little 7500 or more
pon cams power comes on around 4000 power didnt fall off at all but kepth going beyond my 8000 limit

This is with a spoolinator with a 82 ar and a gtx 3067
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Old 07-05-2020, 01:40 PM   #24
slow.wagon
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Quote:
Originally Posted by grangepack2 View Post
A few years late... but I'm looking for drop in cams for the ej207 V8 heads. Aiming for 600whp. Should i keep the stock cams?
Depends on where you want the power. Cams are a bit of a shell game, they don't make power, rather, they just let you move intake/exhaust airflow to an RPM range where useful power can be extracted. You really should be matching cams to your turbo and cylinder head flow characteristics. It is very possible to loose power with aftermarket cams. You also want to consider how you will be using the car. Cam selection for street, drag and circuit are very different.
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