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Old 07-21-2008, 09:51 PM   #1
jstam
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Unhappy Camshafts a waste?

hey guys...im 83% done with my bueye build! haha i got the heads on but im still debating on if i should stay with the stock cams or go with the BC Stage 2 272's. a ford guy i work with said that since i got a bigger turbo and will be boosting more, cams that big wont benefit me. he also said since i had some p&p done to the heads i really dont need them...anyone that knows something about the subaru world that could help would be aawesome. thanks again guys.
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Old 07-21-2008, 09:59 PM   #2
Chocoholic005
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Cams are the brains of the engine, choose the wrong ones and it won't be worth it, but if you do your research, factoring in what your goals are they are totally worth it.
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Old 07-22-2008, 12:15 AM   #3
jigga
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Quote:
Originally Posted by WJM View Post
Wisdom is present in this post.

To the OP: PLEASE do some SERIOUS research in the matter. There are TONS of cams out there. Most of them do nothing. A lot of them you get zero gains, some losses and then crappy driveability.

Since someone will ask...I dont have a real cam preference, but from what I've see, the GSC cams seem to be doing quite well on various builds.
wisdom is present in this post also..

I can't stress enough the side effects of some of the more aggressive cams on daily driveability. Many things we take for granted with the stock setup (ex. being able to follow a low speed limit in town without the engine bucking and stumbling all over the place because it has now become useless at around 2500 rpms and below), idling with an AF ratio that will quickly kill off your cats, and if you are catless, draw attention to the catless nature of your car since it has to idle so rich in order to stay running, and the list goes on. Oh, and let's not forget the inability to cruise at anything close to 14.7:1, meaning embarrassing gas mileage on the highway.

Guess how I know all of this...
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Old 07-22-2008, 11:11 AM   #4
bluescoobywagon
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Sooo.... how big ARE your cams?
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Old 07-22-2008, 11:13 AM   #5
jays05
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Wow, to some extent I experienced every side-effect of aftermarket cams that Jigga mentioned.
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Old 07-22-2008, 02:21 PM   #6
subiefast
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I'm running 272 cams. Drivability is still good.
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Old 07-22-2008, 03:04 PM   #7
9vapors
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280/280... looking forward to that...
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Old 07-22-2008, 07:01 PM   #8
charliew
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Wittmer25 is running bigger cams than 272 I think, and his car runs very politely on the street other than the sound of the exhaust. I don't know that there is such a thing as gas mileage if you want power. I would rather have the power of a turbo 2.5 than the na power of a 350 chev for the gas mileage. BB chevs making 450 hp don't have any gas mileage.
You just gotta forget about the big motor low end torque.
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Old 07-22-2008, 07:08 PM   #9
Turbo_Mike
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hmm thats interesting.. I run BC 272 cams and it runs damn good..

Anything above 1600 it doesnt buck, I run 14.9:1 AFR on the highway and get decent mileage(21-23 depending on my mood), and it runs great.... but then again I tuned my car and I know what I'm doing... that has a lot to do with it
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Old 07-22-2008, 09:37 PM   #10
LiquidForce
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Can you guess which is with upgraded cams and which one is stock?


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Old 07-23-2008, 04:43 AM   #11
bugeyes
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Quote:
Originally Posted by Turbo_Mike View Post
hmm thats interesting.. I run BC 272 cams and it runs damn good..

Anything above 1600 it doesnt buck, I run 14.9:1 AFR on the highway and get decent mileage(21-23 depending on my mood), and it runs great.... but then again I tuned my car and I know what I'm doing... that has a lot to do with it
Very similar situation......

I'm running slightly larger than 272.
Standard open loop tune for highway 14.7 and closed loop control at 15.5. I get good economy (up to the mid 20's).
Yes there is some low rpm power loss which is only evident when starting off from stationary, once going is not noticeable (my ceramic clutch makes this worse, I'd say with a standard type clutch it would be much more drivable).
Typical idle speed 1100rpm.

But the power above 4000 to 8000 is something no standard cam is going to match.
If I was to build again I would go the same cams no doubt about it.
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