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Help! R34 Rb25 Adjustable Cam Gears

simons987
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simons987 Explorer

simons987

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Hi Guys,

I want to put adjustable Cam Gears on my R34 GTT as I have Tomei Type B's Cams installed. The VCT (NVCS) is not been used. The Exhaust Side fits on no problems but the Intake side does not. The Intake side can be bolted up to the Cam Disc that sits in front of the Cam Gear but the hole on the Cam Gear that sits in the Cam is too big.

I did a 30 minute search on the forums and have found nothing, I have tried searching everywhere for an adjustable Cam Gear that fits on with no success. There has to be people who have installed Adjustable Cam Gears in their 34's.

Can anyone help me with this? Shed some light on any products or what type of setups they have.

Edited by simons987
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https://www.sau.com.au/forums/topic/363682-help-r34-rb25-adjustable-cam-gears/
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SS8_Gohan Grand Master

SS8_Gohan

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Posted

i was under the impression that Rb25 guys didn't do cam gears that much as it doesn't make the difference it does like on the Rb26's?

and if they do, i think they only do one side (exhaust?) and leave the rest - why would you not want your VCT? would that not be more beneficial than cam gears? i think that may have something to do with neo people not changing them perhaps, and you not being able to find anything in search results

in all my years of GTT ownership, cam gears didn't once come up in discussions with my tuner or other people - but then again, i was running standard camshafts, maybes that's why

simons987 Explorer

simons987

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Hi Guys,

I really appreciate your input and as from checking out many tunes. I am just going to leave the stock cams gears in. I find the VCT pretty much useless, it's only on the Inlet side + you don't see GTR's with a system like this. And for good reason.

-Rog

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Hi Guys,

I really appreciate your input and as from checking out many tunes. I am just going to leave the stock cams gears in. I find the VCT pretty much useless, it's only on the Inlet side + you don't see GTR's with a system like this. And for good reason.

-Rog

How did you conclude that the VCT is useless ( stupid Nissan wasting money?)

Have you done a dyno run with it switched on and then with it disabled and compared the charts?

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Hi Guys,

I really appreciate your input and as from checking out many tunes. I am just going to leave the stock cams gears in. I find the VCT pretty much useless, it's only on the Inlet side + you don't see GTR's with a system like this. And for good reason.

-Rog

Sorry dude but you will never beat the low/mid range of the VCT, it's simply impossible.

RB26's didn't come with VCT simply because it was not an option - not for good reason.

Think about why people are using RB25NEO heads on 26 bottom ends, HKS V-Cam, jaycar style VCT controllers setups etc etc

VCT is king. End of story. If it's not working for you then you have underlying issues causing these gains not to be realised.

simons987 Explorer

simons987

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  • Author
Posted

Hey guys,

Thanks for posting the graphs up. The low to mid range is a big improvement with VCT. I did eventually find a set of cams that will keep the VCT. There from Greddy and cost a fortune but are well worth it :)

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