Rb26 Cam Gears

[GTR_JOEY]

stock or smaller tomeis

[XKLABA]

I found the stock specs of the NEO turbo cams, they aren't to bad from factory, I'd start at 7 deg advanced on intake and 5 deg retarded on exhaust and tune from there

Otherwise the 252s would be better for response then the 260s

Just realised you have VCT on inlet so no adjusting there

[Ben C34]

Aren't the type a cams from tomei for the neo 252 and 260. Can't remember which was which (inlet or exhaust)

I don't think you can get a pair of 252s from tomei for the neo. Wonder why......

[XKLABA]

Type As are 252 in and ex

Type Bs are 260 in and ex

http://www.rhdjapan.com/tomei-camshafts-poncam-rb25de-t.html

[Ben C34]

Type As are 252 in and ex

Type Bs are 260 in and ex

http://www.rhdjapan.com/tomei-camshafts-poncam-rb25de-t.html

Wow. WTF am I thinking about. ... I'm sure it was tomei. Oh well.

[Ben C34]

Rb26 type a cams are split. 252 in 260 ex.

[BlackBox]

I found the stock specs of the NEO turbo cams, they aren't to bad from factory, I'd start at 7 deg advanced on intake and 5 deg retarded on exhaust and tune from there

Otherwise the 252s would be better for response then the 260s

Just realised you have VCT on inlet so no adjusting there

Pretty sure ben has a way of easily adjusting intake cam on neo that im going to look into, How do you feel the 252s would affect midrange and response?

[GTR_JOEY]

Pretty sure ben has a way of easily adjusting intake cam on neo that im going to look into, How do you feel the 252s would affect midrange and response?

It would be better then type bs

[r32-25t]

34geeteetee is making 395rwkw with the factory cams in his r34, so really you should save your money and put it towards something more useful

[XKLABA]

The NEO turbo exhaust cam has a better profile the the stock 26 exhaust cam, 5-6 deg retard and leave it

[G37Sam]

So if I'm stuck with Type B's what do you guys recommend I dial the gears at?

Edited January 3, 2015 by G37Sam

[GTR_JOEY]

Your not stuck, sell them, Put them in the bin... Use the stock

[BlackBox]

34geeteetee is making 395rwkw with the factory cams in his r34, so really you should save your money and put it towards something more useful

I am under the impression he is using tomei B cams? He is also using E85 which is not an option for me.

It is not a case of saving money or not, i have already purchased type B cams, springs, retainers shims etc.. If it is going to make an Improvement then i might as well do it, but if it is going to be considered a performance Decrease then i should bin the cams for something more suitable.

Perhaps i should start a new thread so i don't derail OP's any further. I am looking more for NEO, specific advise, im not convinced results from rb25 or r33 rb25 would mimic results of the neo

[r32-25t]

You will see a 10kw gain in the top the issue is will you lose anything in the bottom end and how much!

Cause you'll be surprised the difference losing power from the bottom of the range makes to the overall driving experience

And seriously 10kw can be had by screwing in another 1-2psi of boost and is a lot cheaper that way

[GTR_JOEY]

Id Use the new valve train as an upgrade.. Well worth it in my opinion after one of my last set let go and feked the engine

[Ben C34]

34geeteetee is making 395rwkw with the factory cams in his r34, so really you should save your money and put it towards something more useful

I need to check that.

I'm 99 percent sure he is using type b cams and has raved about them.

Edited January 3, 2015 by Ben C34

[r32-25t]

I looked at the thread and i found where he purchased them, so im sure he installed them as well

[SimonR32]

Peak Power Comparison

(for Stock Cat. Equiped Cars)

TYPE A 405 ps

TYPE B 406.33 ps

TYPE R 404.65 ps

So at just over 400ps you make under 2hp less but some on here say lag can improve by 800rpm... I wonder what the difference in power is like at 700ps and 8500rpm

I currently have Grex (Trust) drop in cams that came with the car, as far as I'm aware they came in either 256/256 or 264/264 9.1. Always pondered how much I would kill top end power with the Tomei Type-R, can always do with more midrange

Edited January 5, 2015 by SimonR32

[Ben C34]

That's an interesting comparison but who uses a stock cat?

That's holding back the bigger cams so not a true comparison in my opinion.

Edited January 5, 2015 by Ben C34

[SimonR32]

That's an interesting comparison but who uses a stock cat?

That's holding back the bigger cams so not a true comparison in my opinion.

Tomei Test car...

http://www.tomeiusa.com/_2003web-catalogue/e070_cam_RB26.html