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After Market Na Cams

NA power

By NA power,
in Engines & Forced Induction

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NA power Collaborator

NA power

Posted
Posted

Hi all

Im tryin to case down some after market cams for my NA rb25de, all ive found is Turbo cams.

Ive rang acouple of people and they have told me they cant get a billit cam for a NA and the only way they could do it is take my cams out and weld them then regrind them and that was goin to cost $1600bucks.

Id rather spend the same and get some billets, Anyone put bigger cams in there Rb25de???

Any one no where i can get some???

Or any companys that make em???

I dont mind if i have to get them from Japan aslong as its not goin to cost some bullsh!t price like 3gs or somthing......

anyway let me no people

thanks heaps

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342Four Grand Master

342Four

Posted
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turbo cams usually dont work that well in a n/a cause like you said the exhaust is open a little longer (if i remeber rightly), but also they are suited to be most efficient in the high revs where the turbo is working its stuff, whereas n/a cams dont have so much exhaust opening (ie not as long) and also try and extract more power and turque low down in the revs

something like that anyway

dondesoto Community Regular

dondesoto

Posted
Posted (edited)

SURE CAM can regrind stock cams , they are fairly mild because stock cams cant be ground much .

He does an inlet with 255 degrees duration and 8.2 mm lift

exhaust 258 " " " " 8.2 " "

stock cams are 240 degrees duration with 7. 8 mm lift

$ 170 per cam to regrind

ph 02 4736 1742

Edited by dondesoto
BADR33 Collaborator

BADR33

Posted
Posted

your rb25de will be VVT.. you can still use rb20det cams.. but then you will lose your VVT...

i will be looking at cams at some stage hopfully... somthing to open a little bit more power up top.. otherwise ill just port and polish..

kelford cams in NZ does regrinds as well..

Warpspeed Experienced

Warpspeed

Posted
Posted (edited)

What is all this nonsense about turbo cams not working in an n/a ????

All the cam does is open and close the valves. You decide what cam duration and lift you want to run in your engine and buy an appropriate cam or cams to suit. There must be HUNDREDS of different cam grinds available.

Sure, you need to set it up properly with variable cam pullies, but you have to do that anyway turbo or non turbo.

Edited by Warpspeed
342Four Grand Master

342Four

Posted
Posted

but if you look at the cam profiles for cams for a turbo against a n/a engine of the same family (ie rb25de against a rb25det) the cams for the turbo and n/a are different

the exhaust cam for a turbo is designed to extract as much from the turbo as possible and the inlet to let it suck as much as possible, whereas n/a cams is a balance of both having the exhaust breath, but not to much so as too loose to much backpressure, and the inlet not being to restrictive, but not losing too much in the lower rev range

so a turbo cam in a n/a will not get you much power, if anything, as it is designed for a less restrictive setup

Cubes Grand Master

Cubes

Posted
Posted

Usherly,

Your dribbling... :(

N/A Power,

Grab a set of turbo cams and an adj. cam gear and set them up appropriately. the only real difference between turbo and n/a cams is that turbo's don't like overlap, N/A's love overlap.

Speak to your tuner for a recommedation on what cams you should drop in it. With a guess he may recommend something like a 260degree inlet and 256degree exh.

Or go the regrind..

NA power Collaborator

NA power

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Posted

ok just had a look if my car has that solenoid for the vvt, and it dose.

If i put a set of Turbo cams in for a Rb25 will i b able to keep my vvt??

this is not as easy as it was when i put a cam in my Rb30e.... it was just ring up..... send...... and bolt in....

owell

342Four Grand Master

342Four

Posted
Posted

damn - so i am dribbling

but wouldnt the turbo cams be slightly different with more exhaust lift and slightly longer duration than a n/a cam (i realise that the duration can be dialled out to an extent with adj cam gears)

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