Twin Hks Gt2530 - Rb26 - What Camshafts To Reach Full Potential?

[Owgasm]

Hello All,

Just pulled my engine out a few weeks ago and recently placed it back in the car.

While it was out fitted Twin HKS GT2530.

Just wondering what Camshafts would be best for these turbos/setup.

Wanting more Low End than Top.

What degree and lift should be good to get the FULL POTENTIAL out of the turbos?

I've asked someone in Japan and he said TOMEI 260 in and ex with 10.8 High Lift.

What are your thoughts?

Need the best option.

[rb26s13]

im running the garrett 2860-5's (garretts 2530) with tomei 260 10.25 am goin to be ready to kick it over in the next couple days.. will let you know how it goes than

[Owgasm]

Ok, that'll be good

Let me know ASAP!

[Snowman]

I was running Tomei 260-9.15's with my 2530's and made a good improvement to midrange when I was running them.

I've gone back to standard cams on the 2860-5's however.

[Sydneykid]

With 2530's my choice would be;

264's

around 9.5mm lift

any brand, I have yet to find a difference

cheers

[700HP-GTR33]

Hello All,

Just pulled my engine out a few weeks ago and recently placed it back in the car.

While it was out fitted Twin HKS GT2530.

Just wondering what Camshafts would be best for these turbos/setup.

Wanting more Low End than Top.

What degree and lift should be good to get the FULL POTENTIAL out of the turbos?

I've asked someone in Japan and he said TOMEI 260 in and ex with 10.8 High Lift.

What are your thoughts?

Need the best option.

How much do you want to rock at the lights....?LOL

What other mods. do you have?

Have you Dumps..full exhaust?

The 9.15 Lift Tomie Poncams is a direct bolt on(Might need some new shims though).

This will also work with a standard computer..if you decide to take yours off for some reason or another.

They have the best low,mid..but not high response.

The higher the lift generally means the Higher power at higher rpm.

I have them on mine...with Garrett 2860-5(Equivalent to 2530's)

Run through the RB26 Turbo Upgrade and you will see power results...bear in mind..I have a street/track tune...

Top end power was not what I was looking for.....

EDITED....Link provided for cams and pulley set...it is cheaper .

http://www.nengun.com/tomei/pon-camshafts-pulley-set

[Owgasm]

Hey,

Good Input by all.

Hmm Is it bad to rock at the lights ?

Get people afraid.. but wont be racing New Laws Kill.

Forgot to mention.

HKS Dump Pipes, Twin 3" Exhaust (through Cat), HKS F-Con (Not yet installed as still running stock cams)

"The higher the lift generally means the Higher power at higher rpm."

Very interesting. I'm hoping to take it up HIGH RPM. So looking for the best setup.

Am also looking for a street/track tune. No highway racing

[700HP-GTR33]

I got rocking.

Not much..but enough to hide my face when a mum and kids stop next to me.

They might think I am a young turk..when I am a old one...lol.

Poncams....no more needed..if you don't race.

Great rock and great low to mid range......they are good at high RPM to if you have the right engine internals

that allow you to go past 9000RPM.

[Owgasm]

What will increase the rocking?

Sound a bit like me. DARKER TINT = No need to hide!!

I'm taking it not necessary to change Cam Pulleys?

[700HP-GTR33]

You can get it to rock like a bull if you like...talk to your tuner.

You will need a tune after the install....you need adjustable cam pulleys if your tuner is to get the maximum out of your set up.....but make sure you tell him were you intend to drive it.

You will need a better fuel pump...larger injectors..555 or above..and regulator if you don't have them already

Good luck.

[Owgasm]

Yes, will need a tune.

Are there big differences in a street and track tune?

few extra things forgot to mention.

2 x extra fuel pumps + surge tank, *EDIT* 660cc Injectors

Edited July 19, 2007 by Owgasm

[WRRR]

I was running Tomei 260-9.15's with my 2530's and made a good improvement to midrange when I was running them.

I've gone back to standard cams on the 2860-5's however.

Hey Snowman why back to std cams?

I am on stds now and was looking at the 260 9.15 when a few $ spare. Am I wasting my time?

(By the way I am very happy with the way the std cams run at 0.85 bar but not sure with higher boost.)

[Owgasm]

Anymore input before i make my decission.

[Owgasm]

Why is it necessary for me to Change the Cam Pulleys?

[R31Nismoid]

You need cam gears as a min. They are worth every cent on the RB26

Although the only issue i see, is the HKS F-Con.

You really really limit yourself to a tiny handful of tuners when choosing this particular ECU.

Where as any other ECU on the market just about will be tuneable by any workshop should you have issues with it at any point.

Just something to think about.

[rev210]

you change the cam pulleys in order to be able to tune the cam timing for what you want power curve wise. the Tomei cams installed at 0 make less power than what you can potentially make by adjusting them ,alot less.

[heller44]

rev210, what sort of kw difference do cam gears make, apporximately? Like the original poster I am looking at tomei poncam b's.

thanks.

james.

Edited July 21, 2007 by heller44

[rev210]

depends on the setup but, the lowest I have seen was 30rwhp difference. It depends but, given a GTR likes cam gears with stock cams that should tell you something.

[OFENSV]

With 2530's my choice would be;

264's

around 9.5mm lift

any brand, I have yet to find a difference

cheers

would there be much difference between 264 9.5mm cams and the 260 9.15mm poncams in terms of power and response?

[180bfj20det]

Im pretty sure tomei poncams run best at the zero setting after what I remember reading from SK posts. The other tomei cams most likely need some timing adjustments.

Correct me if Im wrong and Ill get our 32 gtr retuned with timing adjustments on the poncams

you change the cam pulleys in order to be able to tune the cam timing for what you want power curve wise. the Tomei cams installed at 0 make less power than what you can potentially make by adjusting them ,alot less.