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Rb25det Camshafts

xsv_32

By xsv_32,
in General Automotive Discussion

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xsv_32 Enthusiast

xsv_32

Posted
Posted

I have in possession a s1 rb25det head, and i want to no what sort of gains can be expected from getting the camshafts ground to a more 'lumpy' profile? Im going to be using adjustable cam gears regardless but is it worth the money? :)

I want to use the car for drag/street and am aiming for 550+hp using a rb30 set up, and i love the lumpy cam idle sound of high strung rbs, but i cant get a straight answer as to wether duration or lift is what will suit my needs. :banana:

Any ideas or suggestions will be appreciated. :)

xsv_32

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SKYPER Enthusiast

SKYPER

Posted
Posted

From what I understand cam specs depends on turbo type, flow of head,

application, etc. My advice would be to talk to a cam specialist.

This is an example of what they will probably ask you for -

https://www.safe.net.nz/kelford_co_nz/designshop.php

260 duration and above should give you that lumpy racecar idle. The downside

is the loss of bottomend with a J looking bottomend on power graph (RB26 motor).

RB30 might be different due to extra capacity.

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