Thread: All QR25 Cam Specs

quick update...

The diagram on the left is the only set of cams they have which will work just fine with stock springs
The diagram on the Right has not been made and still in production, And you will need aftermarket springs. When will they come out? IDK

today is the day. will see how much hp theses suckers can push.

EDIT: forget, there dyno isnt working.

booo

First post updated. I spoke to dustin from Brian Crower and they are continuing producing cams for the qr25. More studys have been done and they said for agressive n/a setups go with the stage 3. For F/I or nitrous apps, go with the Stage 2 cams

Just ran across this.. Thanks for this thread.

Originally Posted by ash

Stock Qr25 cam specs
244/.407 intake
232/.340 exhaust


Nismo cam specs (n/a and F/I)
262 degrees intake duration/.440 intake lift
242 degrees exhaust duration/.370 exhaust lift


JWT S1 cam specs (n/a and F/I)
264 degrees intake duration/ .447 intake lift
244 degrees exhaust duration/ .376 exhaust lift


JWT C1 Cam specs (best for allmotor)
282 degrees intake duration/ .478 intake lift
249 degrees exhaust duration/ .407 exhaust lift


Brian Crower Stage 2 (best used for F/I & nitrous) $510 shipped
264 degrees intake duration/.425 intake lift
256 degrees exhaust duration/.400 exhaust lift

Brian Crower Stage 3 (best used for allmotor) $510 shipped
272 degrees intake duration/.424 intake lift
264 degrees exhaust duration/.399 exhaust lift

Brian Crower webSite does not have these cams listed so you have to call and order.

I'm thinking of building a qr head this winter. I was wondering which of brian stage 3 or JWT c1 would show more gain. Might go turbo also, would brian stage 2 show a nice gain used n/a, while I'll be saving for my turbo kit (if going that way).

Originally Posted by camirand16

I'm thinking of building a qr head this winter. I was wondering which of brian stage 3 or JWT c1 would show more gain. Might go turbo also, would brian stage 2 show a nice gain used n/a, while I'll be saving for my turbo kit (if going that way).

A certain someone dyno'ed the BC3's and lost a ton of torque and only gained 7hp. I'd go with JWT any day over BC.

Originally Posted by MisterNuts

A certain someone dyno'ed the BC3's and lost a ton of torque and only gained 7hp. I'd go with JWT any day over BC.

Without timing control, and completely N/A. If he was say, aiming at huge hp numbers, with a huge turbo, those big ass cams would let him make more power than he otherwise could. Race cars run big ass cams not because vthey would get gains N/A but because they need the additional detonation prevention to make their silly power.

Unless you are going to try for nutty power, run JWT or S2 cams.

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what if you got a fully built head but all motor but wanna run spray also what do u do there

Originally Posted by silvabullit

what if you got a fully built head but all motor but wanna run spray also what do u do there

Big cams with minimal overlap. With something like UpRev you could control intake cam timing to help with that.

so bc3's arent worth it over s1s?
im stuck between these 2 now