Which Cams

[Red Devil Turbo]

I'm rebuilding my head using Supertech valves, hydraulic spring kit, seals, valve guides. I'm also rebuilding the bottom end with supertech pistons and eagle rods N1 oil and water pumps.

I'm running Nistune with an Rb20 ECU, so I don't have VCT, I want to buy uprated cams, should I buy the Tomei pon cams or the Greddy easy cams for the VCT or use a different profile cams and remove the VCT?

If which would be the best and reliable set up for a 500 to 600 BHP car, daily driver a lot of autobahn and some track.

[NYTSKY]

If you can get the VCT working again and install a set of Poncams you will see good gains all through the rev range.

[Red Devil Turbo]

the problem is that I can't get a good explanation of how to make it work right with the RB20 ECU

[GTScotT]

The issue you will have is most RB25 cams suit VCT rather than not. AFAIK adjustable gears on the stock cams can do the job fine.

GL

[Red Devil Turbo]

someone knows how to make the vct work on the RB25 using the Rb20 ECU and Nistune?

[KiwiRS4T]

You have to buy a seperate controller or alternatively swap your ecu for a Z32 one I believe and stick your nistune chip in that. There are a few tricks to it which i don't know (try searching). Better still would be a Link ecu which will also control the VCT :

http://www.linkecu.com/dealers/germandealers

A cam gear on the exhaust cam is not an alternative to VCT - ideally you would do both.

[STATUS]

advance up the intake cam with cam gears if not running vct it will help alot.

I got good results with 256 degrre 8.5mm lift, i think i ended up around 8 degrees advanced on the intake..

here is the thread http://www.skylinesaustralia.com/forums/Rb...ft-t308743.html

[Red Devil Turbo]

I just bought a MSD rpm switch, any idea how to install it?

[STATUS]

I just bought a MSD rpm switch, any idea how to install it?

the instructions are pretty clear in the msd kits, fitted allot to control nitrous.

[Red Devil Turbo]

which one is the pin from the ecu that it has to be wired to?

[Red Devil Turbo]

I just don't want to mess up my ECU or my engine

[Red Devil Turbo]

using this diagram, I beleive I have to connect it to pin #113

http://www.skylinesaustralia.com/forums/ip...ECU_Pinouts.jpg

Also, which Tomei cams would be better? Is it only one type for the RB25 with VCT and Hydraulic lifters?

Or what about the Greddy easy cams?

[GTScotT]

That diagram is for an R33 RB25DET ecu with VCT.

Your RB20 ECU has no VCT.

You need an RPM based controller that will work off the RB20 ECU's RPM trigger.

[DR 32R]

using this diagram, I beleive I have to connect it to pin #113

http://www.skylinesaustralia.com/forums/ip...ECU_Pinouts.jpg

Also, which Tomei cams would be better? Is it only one type for the RB25 with VCT and Hydraulic lifters?

Or what about the Greddy easy cams?

Pon cam for vct and hydraulic lifters. Two types for series one and two.

Edited November 22, 2010 by WHITE gtt

[Dale FZ1]

I got good results with 256 degrre 8.5mm lift, i think i ended up around 8 degrees advanced on the intake..

Trent did you try variations on total increase in overlap? Eg IN+4, EX-4? Still gives you 8 degrees but I'm interested to know how it affects the torque curve.

Using a Tighe grind on my 30/25 and it seems that there is a point where the mid range is noticeably fatter but torque at the top end falls away and you end up short shifting a bit. Note this is a bit of subjective feel, trying a few settings on the road before slipping it onto the dyno.