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Old 06-28-2008, 12:46 PM   #1
WRX_scott
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Default BC cams 272 or 280

I am looking at getting Brian Crower cams for my build. Currently I have a 2.5L waiting to go into my WRX. I plan on going with USDM STi heads or Spec-C heads. I cant decide between the 272 or 280 cams. Does anyone on here have experience with these cams? I am aware there is a little lope due to the cams but I am also planning on going with Hydra.

Setup:
Rotated 35R
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STi or Spec-C heads
JDM Spec-C intake manifold
PPG gear box
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other support mods...
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Old 07-08-2008, 02:46 AM   #2
86ray86
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280's for a 2.5 will give the best gains and will have very good top end.. 272's are for 2-2.4 imo..
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Old 07-08-2008, 12:48 PM   #3
Jpizzzle
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I thought BC cams came in 274, not 272? might be wrong though...
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Old 07-08-2008, 01:33 PM   #4
WRX_scott
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Well I have thought about it and I am still not sure if I want to use STi or Spec-C heads. I would like the benefit of AVCS (dual would be nice) but I like the idea of saving money and using my stock 2.0 heads on the 2.5l and getting them ported and cams. What do you all think?

Scott
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Old 07-08-2008, 01:40 PM   #5
alex02wrx
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I have the 272's and they have a nice smooth lope. I wish I could tell you how the top end performs but Im still in the break in process. Im running A Blouch Dom 3.0R, 2.5L, PnP 2.0 heads, BC Valves, Springs, & Retainers.
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Old 07-08-2008, 10:02 PM   #6
aaron04
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280 cams will not be good for a street car. unless you want to idle at 1500rpm
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Old 07-08-2008, 11:32 PM   #7
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Quote:
Originally Posted by Jpizzzle View Post
I thought BC cams came in 274, not 272? might be wrong though...
Advertised duration != actual duration or duration at .050.

One manufacturers 272s may be bigger, better and badder than anothers 274s. Different manufacturers use different checking heights to come up with the best ""marketable" duration.
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Old 07-08-2008, 11:38 PM   #8
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Quote:
Originally Posted by aaron04 View Post
280 cams will not be good for a street car. unless you want to idle at 1500rpm
Definitely something to consider... idle speed... It gets old rather quickly having your idle sit so damn high on a daily driver.
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Old 07-09-2008, 05:40 AM   #9
WRX_scott
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Quote:
Originally Posted by jigga View Post
Definitely something to consider... idle speed... It gets old rather quickly having your idle sit so damn high on a daily driver.
Good point Jigga, also raises the exhaust note that will be emitted from the car as well and we all know we dont want the attention of the cops.
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Old 07-09-2008, 06:39 PM   #10
alex02wrx
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My Idle On the 272's is at 900-1000 RPMS with my break in tune.
Quote:
Originally Posted by jigga View Post
Definitely something to consider... idle speed... It gets old rather quickly having your idle sit so damn high on a daily driver.
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Old 07-09-2008, 08:01 PM   #11
Kaldar142
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how would 272s do on a 2.0 car that is used for autox?

or what cams would i use for for low / mid range but still good top end, basically a good powerband?


sorry to hijack :P
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Old 07-12-2008, 04:23 AM   #12
86ray86
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Quote:
Originally Posted by aaron04 View Post
280 cams will not be good for a street car. unless you want to idle at 1500rpm
i have 280s and mine idle no where near 1500, idles at 1000, comes down to how well the tuner can tune really...
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Old 07-12-2008, 11:04 AM   #13
japslapr
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Quote:
Originally Posted by aaron04 View Post
280 cams will not be good for a street car. unless you want to idle at 1500rpm
Not true. There are ways around this. I have 280*'s on my built 2.0l. It's just a matter of the motor getting enough air to stay running at idle. I just cracked my throttle body plate and it idles fine around 1000-1200. Lopes its ass off though. Car cuts off if I abruptly let off the gas every once in a blue moon... but not often. My car has ridiculous topend... but different build.
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Old 07-13-2008, 04:33 AM   #14
blue05
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with a higher duration cam will there be any clearance issues with fully advanced avcs? the usdm heads only advance 20 degrees, the jdms I believe advance 40. the 272's have a 10.14mm lift, or something close to that. the 280's have 14.5 i think. does anyone know if you can run full advance with the larger cam? I would be very nervous to run the 280 not knowing if the valves will have the chance to touch the piston.
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Old 07-13-2008, 10:07 AM   #15
jaxscuby
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you have usdm 03 wrx. this ecu does not support avcs.
you could try to have a jdm/edm rom file flashed onto your
ecu & some wiring modifications. if that doesn't work you could
get 04 sti ecu & engine harness. but guess you'll have to weigh
your options..cost/time..all this to get avcs cams to work properly

then you say hydra...well how much does it cost?..1500~2000?
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Old 07-13-2008, 02:45 PM   #16
WRX_scott
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I know what I have and know what my car is capable of. That is why I am doing the research now regarding the pros/cons of using my EJ20 heads vs. AVCS heads.
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Old 07-13-2008, 05:34 PM   #17
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Quote:
Originally Posted by japslapr View Post
Lopes its ass off though.
no doubt the car shakes noticeably from side to side also while inside the car..
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Old 07-14-2008, 10:40 AM   #18
kellygnsd
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Quote:
Originally Posted by japslapr View Post
Not true. There are ways around this. I have 280*'s on my built 2.0l. It's just a matter of the motor getting enough air to stay running at idle. I just cracked my throttle body plate and it idles fine around 1000-1200. Lopes its ass off though. Car cuts off if I abruptly let off the gas every once in a blue moon... but not often. My car has ridiculous topend... but different build.
You can do that, some people drill a small whole in the TB plate. There are ways to get around it but you said it yourself, the return to idle sometimes sucks stalling out every so often. Not a big concern for you or I but not the most friendly DD either.
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