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Adjustable Cam Gear

taxii88

By taxii88,
in Engines & Forced Induction

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kitto Mentor

kitto

Posted
Posted

Some people still fit an adjustable cam gear to the factory exhaust cam.

My RB26 had just an adjustable cam gear on the factory exhaust cam from Japan.

I'll be fitting one on the exhaust cam of my NEO. I'm using factory cams for the time being with the notion of changing to after market cams down the track. I'll get my tuner to play around with the exhaust cam timing. If it so happens to be an advantage then awesome. If not then it will come in handy later on.

34GeeTeeTee Grand Master

34GeeTeeTee

Posted
Posted

Some people still fit an adjustable cam gear to the factory exhaust cam.

My RB26 had just an adjustable cam gear on the factory exhaust cam from Japan.

I'll be fitting one on the exhaust cam of my NEO. I'm using factory cams for the time being with the notion of changing to after market cams down the track. I'll get my tuner to play around with the exhaust cam timing. If it so happens to be an advantage then awesome. If not then it will come in handy later on.

My NEO has the exhaust cam gear and poncams, was adjusted slightly i think!

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Certainly shouldn't be on the top of your list - especially not with a stock motor - and nor should cams be near the top.

When you have done the full exhaust, fullflow air filter, fmic, bigger injectors, Z32afm, new fuel pump, better turbo, upgraded ecu you may find that with an adjustable exhaust gear only you can shift some of your top end power to the midrange.

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

When I had the RB25DET on about 250awkw I had mine dynoed and best result was about 3.5 deg ret from memory and it gained about 8 kw at about 3500 -4000 and a few off the top. And no didn't loctite the set screws - someone posted that they were the weak point on cheap cam gears so I went to the engineering supplies and they said they were already good quality high tensile (had the standard stamped on them) so I just did them up tight with the hex key and they never moved. No reason not to loctite I suppose once you're happy with the tune.

3BEPKA Enthusiast

3BEPKA

Posted
Posted (edited)

Hi guys,

I'm looking to get my car tunned on e85 in coming weeks and was thinking about putting adj. cam gear on ex side. Its for built 25 with tomei 256/8.5 poncams, 35R .86 etc. It's been making 470-480 whp @1.6 bar for few years and makes full boost by 4500rpm

How much gain can I expect from playing with cam gear if any?

Cheers

G.

Edited by 3BEPKA
  • 11 months later...
Chris32 Veteran

Chris32

Posted
Posted

Any definative answer on a Exhaust cam gear for a RB25 NEO? I've got the 100k service coming up and want to know if its worth popping one on.

Still stock turbo, but will upgrade later on down the track. If its only a few KW I don't think I'll bother

34GeeTeeTee Grand Master

34GeeTeeTee

Posted
Posted

Any definative answer on a Exhaust cam gear for a RB25 NEO? I've got the 100k service coming up and want to know if its worth popping one on.

Still stock turbo, but will upgrade later on down the track. If its only a few KW I don't think I'll bother

In this case, dont bother :)

Chris32 Veteran

Chris32

Posted
Posted

Is it worth popping one on though for later on down the track with a bigger turbo/injectors?

I've read pages of old threads today and everyone has a differant opinion, most of which seems to suggest the standard NEO cams do a pretty good job without adjustment.

What gains or lack of did you guys experience?

34GeeTeeTee Grand Master

34GeeTeeTee

Posted
Posted

Is it worth popping one on though for later on down the track with a bigger turbo/injectors?

I've read pages of old threads today and everyone has a differant opinion, most of which seems to suggest the standard NEO cams do a pretty good job without adjustment.

What gains or lack of did you guys experience?

I run poncams so the the adjustable gear sits at 0 and does bugger all.

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