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what cams are best for my setup?


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current mods: rb25det

apexi fc computer/ z32 air flow meter

gt28 turbo (450hp)

600x300x75 cooler

upgraded fuel system

3 inch zorst/twin dump

pod

bov

and im now in the market for some cams, which ones should work best with my setup? i was reading a cams article in speed mag from a few months ago and the application guide says that the 270 intake and 270 exhaust have the best street stars followed by 260 intake and 260 exhaust and these are tomei cams, also will upgrading the cams give my idle a nice lumpy sound?

thanks

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Patience mate, wait for a few of the regulars such as B-Man to see this and they will be able to provide some helpful info. Will assume you are referring to a GTS-T in your post since you didnt mention the car.

Tomei Poncams seem to be a popular choice

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what specs are stock rb25det cams.And also what size is recomended to use with the rb25det.Poncams were first on my list of cams to choose from and then i saw others which offered longer duration and more lift but as i understand it to much lift is bad and can cause premature failure of valve stem springs and lead to worse things like a valve in the piston.

what is max lift for tha stock rb25det valvetrain?

also would you suggest using any cam gears when purchaseing a set like the poncams.

does exhaust overlap have a big part in performance with poncams like when using stock cams and adj gears?

heres a list of the tomei range for the rb25det

TOMEI Intake Camshaft

(Camshafts) ¥31,416

Solid LOW Type. 260 degrees duration, 9.15 mm lift.

TOMEI Exhaust Camshaft

(Camshafts) ¥31,416

Solid LOW Type. 260 degrees duration, 9.15 mm lift.

TOMEI Intake Camshaft

(Camshafts) ¥31,416

Solid HIGH Type. 260 degrees duration, 10.25 mm lift.

TOMEI Exhaust Camshaft

(Camshafts) ¥31,416

Solid HIGH Type. 260 degrees duration, 10.25 mm lift.

TOMEI Intake Camshaft

(Camshafts) ¥31,416

Solid LOW Type. 270 degrees duration, 9.25 mm lift.

TOMEI Exhaust Camshaft

(Camshafts) ¥31,416

Solid LOW Type. 270 degrees duration, 9.25 mm lift.

TOMEI Intake Camshaft

(Camshafts) ¥31,416

Solid HIGH Type. 270 degrees duration, 10.25 mm lift.

TOMEI Exhaust Camshaft

(Camshafts) ¥31,416

Solid HIGH Type. 270 degrees duration, 10.25 mm lift.

TOMEI Camshaft Kit

(Camshafts) ¥59,136

PONCAM Intake and exhaust camshafts. 256 degree intake and exhaust, 8.50mm lift camshafts. Suitable for NVCS vehicles. Please specify series 1 or 2 R33 GTSt.

Taken from greenline.:)

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what specs are stock rb25det cams.And also what size is recomended to use with the rb25det.Poncams were first on my list of cams to choose from and then i saw others which offered longer duration and more lift but as i understand it to much lift is bad and can cause premature failure of valve stem springs and lead to worse things like a valve in the piston.

what is max lift for tha stock rb25det valvetrain?

also would you suggest using any cam gears when purchaseing a set like the poncams.

does exhaust overlap have a big part in performance with poncams like when using stock cams and adj gears?

is it good to mix and match makes.

heres a list of the tomei range for the rb25det

TOMEI Intake Camshaft

(Camshafts) ¥31,416

Solid LOW Type. 260 degrees duration, 9.15 mm lift.

TOMEI Exhaust Camshaft

(Camshafts) ¥31,416

Solid LOW Type. 260 degrees duration, 9.15 mm lift.

TOMEI Intake Camshaft

(Camshafts) ¥31,416

Solid HIGH Type. 260 degrees duration, 10.25 mm lift.

TOMEI Exhaust Camshaft

(Camshafts) ¥31,416

Solid HIGH Type. 260 degrees duration, 10.25 mm lift.

TOMEI Intake Camshaft

(Camshafts) ¥31,416

Solid LOW Type. 270 degrees duration, 9.25 mm lift.

TOMEI Exhaust Camshaft

(Camshafts) ¥31,416

Solid LOW Type. 270 degrees duration, 9.25 mm lift.

TOMEI Intake Camshaft

(Camshafts) ¥31,416

Solid HIGH Type. 270 degrees duration, 10.25 mm lift.

TOMEI Exhaust Camshaft

(Camshafts) ¥31,416

Solid HIGH Type. 270 degrees duration, 10.25 mm lift.

TOMEI Camshaft Kit

(Camshafts) ¥59,136

PONCAM Intake and exhaust camshafts. 256 degree intake and exhaust, 8.50mm lift camshafts. Suitable for NVCS vehicles. Please specify series 1 or 2 R33 GTSt.

Taken from greenline.:)

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I am extremely interested in this topic and have read many times Sydneykid recommends the Tomei Poncams. I have also been advised, that the Tomei Poncams are only IN256/EX256 with 8.5mm Lift on both.

I'm not sure what sort of power figure you're after but these are not that big an improvement.

The alternative is the HKS Step 1's with IN256/EX264 with 8.8mm and 9.0mm Lift option, which also work with the VVT on the Series 1 and 2 GTS-t.

Can someone please comment on either of theses sets of cams?

Thanks Ken

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