Adjustable Cam Gears

[Dobz]

RB25's already have all you need with the nvcs system to aid bottom end response by advancing the intake cam up to a certain rpm.

adjusting the exhaust side of things doesnt do a great deal for what its worth.

[Sol32]

And dont forget to mention the fact you had a turbo aswell :sorcerer:

WTB reading lessons

[R31Nismoid]

Oh my bad, i thought this thread was about gts-t's... not gtr's

[tridentt150v]

To summarise--------------

Genarally speaking, it all depends on the motor model as to whether adjustable cam wheel/s are worth it with poncams. And I don't know if the same holds true for other cams such as HKS etc.

With poncams installed:

I've heard that RB20's still get some benefit out of trimming the timing.

RB25's generally get very little benefit.

RB25 NEO's Don't know, don't remember, somebody else???

RB26's get good benefit with cams, and because they don't have NVCS variable valve timing on the inlet side they can use an adjustable cam pulley on both inlet and exhaust.

That should keep everyone happy [except GTT owners until someone verifies].

[tridentt150v]

tridentt150v- what other supporting mods do you need for poncams?

Other than the usual fmic, exhaust, power fc..

Thats a good start, You'll get good power out of that combo. Throw in a bigger turbo at some stage as well.

[Trav33]

Are the same adjustable cam gears used on the exhaust side and inlet side? ie, are they swapable, or different and unique?

[tridentt150v]

I think it depends on the motor model once again.

[Trav33]

I think it depends on the motor model once again.

R33 GTS-T!

[frankxinyu]

GTR & GTS-t are different in the gains from cam gears

GTR's, there is a massive gain if you keep the stock cams

GTS-t's, sometimes there is no gain at all.

i wonder the reason behind it?

i have them on mine, with pfc and i gained about 60hps at the wheels

[R31Nismoid]

First post on this page is a good response

[johnbela]

So would you guys recomenend getting my exhaust side pulley tuned if its already on the car. Or is it not worth my while. I have done all the usual bolt on mods?

[tridentt150v]

R33 GTS-T!

Read the thread, you only need an exhaust one.

[tridentt150v]

So would you guys recomenend getting my exhaust side pulley tuned if its already on the car. Or is it not worth my while. I have done all the usual bolt on mods?

There is no yes/no answer. You will have to book some dyno time and do a few runs while adjusting the timing to see what gains you will get. Some gtst's don't benefit, while others get real gains at up to 5 degrees. For me it was best at 4 degrees. The gain was only 8kw over 0 degrees. And I had fmic, zorst, pod, pfc, etc etc.