[avi1777]

hi
I'm building a 2.5 engine with cp pistons,pauter rods,sleeves,porting and a gt35r.
i heard that the 2.5 doesn't like to rev and is idle until 7500RPM.
which cams should i buy? i tought to buy 264 and 272
thanks

[06BlUEBOY]

i would go with the bc 280 camshafts

[avi1777]

anyone else please?

[jnprn2003]

Pm Neandrathal Racing...he is a cool cat and will steer you in the right direction.

[avi1777]

sorry
who?

[Tortfeasor STi]

Originally Posted by avi1777

sorry
who?

Neanderthal Racing is a user on IWSTI. Check out his members journal.

As far as cams go, your choice will depend a huge amount on your intended use. If you are looking to go drag racing with this and street-ability is not an issue then go big. If you are looking for a street stick that can idle in the rain and on humid days (i.e. it creates sufficient vacuum at idle) and does not stall out, then you need a smaller camshaft designed with little overlap. It is worth noting that many applications have made large power with the stockers.

[avi1777]

im looking to get a street car with 500whp
i heard that the 264 cams are good at idle

[kwlsti]

i'm making the same thing basicaly, this is going into a track car. i went with kelford ex 276/10.7mm in 278/11.3mm.

[avi1777]

did you install it already?

[kwlsti]

yes it runs like SH!T with the vf39 i had on, but should have good numbers after i get my Full-Race GT35R-TS kit. should have the kit soon numbers in maby 2-3 months.
idle was fine btw.

[Tortfeasor STi]

Originally Posted by kwlsti

yes it runs like SH!T with the vf39 i had on, but should have good numbers after i get my Full-Race GT35R-TS kit. should have the kit soon numbers in maby 2-3 months.
idle was fine btw.

Precisely why you have to match your cams with your intended use. If you pair a huge cam with a little restrictive VF39, your car will most likely never run right, because the VF39 does not create enough air flow to properly feed your engine with its enormous new valve events created by the cam. So when building an engine you have to REALLY do your homework before buying parts, or go with a set-up thats designed by a manufacturer to work together.

[avi1777]

OK so lets it will be on a 2.5 engine with a gt35r turbo,will 264 cams make a difference?does it worth the money?
thanks

[kwlsti]

Originally Posted by Tortfeasor STi

Precisely why you have to match your cams with your intended use. If you pair a huge cam with a little restrictive VF39, your car will most likely never run right, because the VF39 does not create enough air flow to properly feed your engine with its enormous new valve events created by the cam. So when building an engine you have to REALLY do your homework before buying parts, or go with a set-up thats designed by a manufacturer to work together.

thanks for that.....

but i didn't builds a $10,000 engine for a vf39 , i built it for the gt35r-gt40r that is stated in my post.

[kwlsti]

Originally Posted by avi1777

OK so lets it will be on a 2.5 engine with a gt35r turbo,will 264 cams make a difference?does it worth the money?
thanks

yes it will make a big difference. are you building new heads? if not you should.
the GT35R is quite a lot bigger then the stock turbo which the stock cams are designed for. the stock cam just can't flow enough to air to the turbo. more flow more air more boost more . it's all ways a good idea to ask your builder and tuner what they think is a good cam range for your engine, turbo, and application. forums can be misleading. or so i hear.

[avi1777]

i think i will have enough power with a gt35r on a 2.5 with porting and polishing the heads.now i can only hope that the gear wouldn't brake in half. will it hold 500whp?