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Rb 25 Camshafts

wizlb

By wizlb,
in Engines & Forced Induction

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wizlb Proficient

wizlb

Posted
Posted

I have done a search but was unable to get the kind of information I needed to understand CAMSHAFTS.

Can you tell me which kind of camshaft to get and and what HP gains are. I know of TOMEI, HKS ONLY. Thanks PPL

I have these mods

just replace my turbo with a Hi-flowed GTT and VG-30 rear.

Z32

Fuel Reg

Exhaust Cam

Hi-flow Cat

FMIC

BC

Walbro 255L

Split dump

Apexi Power FC

3" Exhuast Tip

550 nismo injectors

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Kranker Collaborator

Kranker

Posted
Posted

Would probably have to say that the stockies will do with your setup.

But if you really want some cams, buy some big brand jap ones like the ones uve metnioned but stay sensible on the duration and lift

Maybe some tomei poncams 252 deg duration and 9.15mm lift....dunno.

You wont see gains just by dropping a set of cams, ull also need new cam gears, and you may need to mod the valvetrain (valves, springs etc)

Then they all need to be set up properly, timing adjusted and the ECU will need a retune

And even then with your setup you might get 20kws at the wheels, you may end up with a much meatier midrange and the turbo will spool quicker, or you may get nothing...

Cams are a great mod, often underrated, but they arent really a huge poweradder on a mild tuned car, better kw/$ value things to be done

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NYTSKY Grand Master

NYTSKY

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The only things i noticed when my poncams were installed was more torque off boost and my dyno graph was alot smoother.Maybe brought the boost on 100-200rpm earlier.

Dont really notice big power gains until you get into the 260deg/9.15mm onwards IMO.

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tridentt150v Grand Master

tridentt150v

Posted
Posted

Use 256' 8.5mm lift ones for increased efficiency and a smoother power delivery maybe.

If you use bigger say 272' and 9.something lift then you could get a better peak power result, but it will be over a smaller rev range.

I have Tomei 256/8.5, not unhappy with them, but 280rwkw was my baseline, and I wanted room to move above this figure. If you are happy with around 260rwkw, std cams with an exhaust cam wheel with around 3-5 degrees on it would be fine [you'd set that up on a dyno tune].

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