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How much power do you want? Have you got a great suspension set up and good brakes?

For more power forget the cams and plenum and get E85 and turn up the boost (and get a top tune) and if that"s not enough upgrade your turbo.

Bigger cams will only move the power to the right on the graph. Yes there may be a tad more of it but you will loose a whole lot down low. Same goes for putting a different plenum on. So its a trade off. May be worth it, may not, depends on exactly what you want to do with the car.

Also note that if you upgrade to the wrong cams (generally anything massive) you will need to delete the VCT solenoid on the intake, which will also hurt low down torque and power. I think the HKS 256mm drop in does let you retain vct? (someone would have to confirm that) so that, or one tha tdoes, pretty much the only one you should realistically go with

I already have all that I'm using your turbo the atr45 externally gated.. I have a greedy Cooler and 3inch exhaust all the way through

I'm making 336rwkws on P98 fuel internally gated with exhaust dropped @ 22psi with the same turbo on stock cams, it is capable of making alot more then 300rwkws on P98 fuel with stock cams. There is a simple way of checking to see what you need. Take it back to the tuner to do a simple dyno run with exhaust dropped and do a pressure check across the cooler when its at full boost (check my thread). Also if you are running the JJR's 6 bolt Nissan front pipe, make sure the 6 bolt flange is die-grinded to suit factory dump pipe gasket.

If its showing its holding alot more boost that mades more power with dropped exhaust it means some thing in the exhaust is restrictive. Or if seeing 30psi before the cooler and 20psi after you will need a bigger cooler.

Having the bigger cams without the system been able to flow that extra bit of air, it will make absolutely no differences to peek power.

  • Like 1

fuuark it... might as well brag:

R33 Series 2 GTS-t with over 300000km (Edward Lee's Special Edition, dash says 157xxx)

  • Stock Motor with (most likely) 350000km, based on wear and tear of interior, bushing etc.
  • Stock cams
  • Stock valve springs
  • Stock valve seals
  • Stock head
  • Stock head gasket
  • Stock bottom end
  • Stock intake manifold
  • Stock exhaust manifold with havoc gate modification

post-22311-0-16951700-1463922770.jpg

I run camtech 272 9mm lift while retaining vct still, picked up about 45hp over stock cams and didnt shift the rpm too much as i kept the vct still...

but it isnt a cheap upgrade bit over 2k, prob find cheaper upgrades to gain 50hp..

Edited by methz

fuuark it... might as well brag:

R33 Series 2 GTS-t with over 300000km (Edward Lee's Special Edition, dash says 157xxx)

  • Stock Motor with (most likely) 350000km, based on wear and tear of interior, bushing etc.
  • Stock cams
  • Stock valve springs
  • Stock valve seals
  • Stock head
  • Stock head gasket
  • Stock bottom end
  • Stock intake manifold
  • Stock exhaust manifold with havoc gate modification

post-22311-0-16951700-1463922770.jpg

Nice.

But he needs cams and a bigger turbo because of this:

post-89815-0-38410800-1464930708_thumb.jpg

^^^^ Much better daily

:yes::yes::yes::yes::yes::yes::yes::yes:

I was thinking 30 bottom end but I already have forged Pistons and stuff in the 25.. E85 more boost would be good but don't have e85 in Wollongong where I live.. So cams was the optiion and maybe a plenum.. I will do what you said stao and I will look into it! Thanks guys appreciate the feedback!

Another question my tuner said he doesn't want to run more then 20psi on my car because it's on 98 it's safe tuned can I run more?

Edited by sergi_dee

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