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03-04-2017, 06:08 AM | #1 |
Scooby Newbie
Member#: 259642
Join Date: Oct 2010
Location: BW EFR7670 TS 1.05 EWGs
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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. |
03-04-2017, 02:13 PM | #2 |
Scooby Newbie
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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. |
03-04-2017, 07:56 PM | #3 |
Scooby Specialist
Member#: 29292
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Chapter/Region:
SCIC
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Vehicle:2004 WRX wagon silver |
if you have a 207 why dont you get the tomei poncams?
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03-04-2017, 09:22 PM | #4 |
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03-04-2017, 09:37 PM | #5 |
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I was told that the tomei time attack car runs these and they have about 500ish
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03-04-2017, 11:15 PM | #6 |
Scooby Newbie
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Off topic but, how do you like that turbo? Looking into the 7163 myself..
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03-05-2017, 07:41 AM | #7 | ||
Scooby Newbie
Member#: 259642
Join Date: Oct 2010
Location: BW EFR7670 TS 1.05 EWGs
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Quote:
Quote:
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03-05-2017, 07:52 AM | #8 |
Scooby Newbie
Member#: 259642
Join Date: Oct 2010
Location: BW EFR7670 TS 1.05 EWGs
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03-05-2017, 08:20 AM | #9 |
Scooby Newbie
Member#: 259642
Join Date: Oct 2010
Location: BW EFR7670 TS 1.05 EWGs
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03-05-2017, 09:53 AM | #10 |
Scooby Specialist
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03-05-2017, 12:48 PM | #11 | |
Scooby Newbie
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Location: BW EFR7670 TS 1.05 EWGs
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what is specs?
Quote:
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03-05-2017, 03:15 PM | #12 |
Scooby Guru
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Tri-State
Location: south nj
Vehicle:00 RSTI Coupe Twin Scroll 2.5XTR EJ207 |
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 |
03-05-2017, 04:00 PM | #13 | |
Scooby Newbie
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Join Date: Oct 2010
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Quote:
Kelford 264 or RCM 268 are much better. I really think about that two cams. |
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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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03-06-2017, 10:44 AM | #15 |
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03-06-2017, 01:17 PM | #16 | |
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Quote:
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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03-06-2017, 02:15 PM | #17 |
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RMIC
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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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03-07-2017, 02:49 AM | #18 | |
Scooby Newbie
Member#: 259642
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Yes BC 272 Stage 3 has good specs
Quote:
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03-08-2017, 06:54 PM | #19 |
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BC 272/272 are good
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03-13-2017, 11:56 AM | #20 |
Scooby Newbie
Member#: 259642
Join Date: Oct 2010
Location: BW EFR7670 TS 1.05 EWGs
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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. |
06-17-2020, 02:56 PM | #21 |
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06-17-2020, 04:05 PM | #22 |
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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. |
06-18-2020, 05:00 PM | #23 | |
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Quote:
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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07-05-2020, 01:40 PM | #24 |
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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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