Late R33 Gts25t Ecu/cas Q's .

[discopotato03]

Can anyone tell me if this cam CAS drive can be changed or is it fitted for life ?

Also those late/last 97 R33GTST's , did anything electrically change with the ECU and CAS itself ? Does the on R33 GTS25T PFC work with them as well or model specific change/mod ?

Cheers A .

[R31Nismoid]

You can change it

You need to crack the CAS open and change the disc on the inside... its a lot of rooting around though.

What interesting endeavouyr are you upto this time?

[Cubes]

Disco,

Bl4ck32 runs a series 2 cas on his rb30det. It had to be slightly modified to fit up, not sure exactly what modifications were made.

That would suggest the output is the same as the early models.

[discopotato03]

What I want to know is can the "peg" or drive in the camshaft itself be changed from late 97 R33 RB25DET type (same as r34 ?) to the earlier type half moon/spline arrangement . I guess if the answer is no then does the late R33 GTS25T CAS (black plastic dome type) plug into and work with say the 96 models loom/ecu er PFC .

LOL cheers A .

[paulr33]

a plain r33 gtst PFC works on a rb25det 98 style CAS

dezz has a 1998 r33 gtst with 98 style cas and PFC with no problems

[tridentt150v]

This would have nothing to do with Moanie's cams now would it?

I've also got a late model '98 gtst with a PFC, works no problems.

[Sydneykid]

This is an interesting question, hence why it is being asked.

There appears to be 4 types of CAS used on R32/33/34’s.

1. All R32 and R33 S1 (half moon drive)

2. R33 S1.5 (half moon drive)

3. R33 S2 (star drive)

4. R34 (star drive)

But don’t R33’s in S1, S1.5 and S2 all use the same Power FC? So the internals of the CAS should be the same. If so, why did Nissan change the CAS from half moon to star drive? Unless the internals of the CAS are different, but the Power FC doesn’t care. Either it just ignores the differences or it compensates for them.

As I said, an interesting question.

cheers

[darrinspencer]

If so, why did Nissan change the CAS from half moon to star drive?

As I said, an interesting question.

cheers

I have seen the half moon snapped off.

Maybe it was a simple design change to prevent this?

[sewid]

R34 GTRs are half moon.

I have seen the "star" drive ones wear out.

The plot thickens????