R34 Gtt Power Fc

[beastien]

Does anyone know how the Power FC controls the VVT in an R34 GTT? as I have found out the Neo is different from the earlier RB25DET.

Does it control it the same as the stock ECU eg: infinitely variable? or just like the older R33 engine eg: on\off?

Cheers

And if anyone knows, would an R34 GTT Power FC control the VCT on an R33 successfully?

[paulr33]

And if anyone knows, would an R34 GTT Power FC control the VCT on an R33 successfully?

i doubt this would work

[aphid]

no doubt the r34 GTT would contain another map controlling the base timing advance/retard on the cams it controls, if you were to doctor this map effectivly perhaps it could work?

[beastien]

Well Ska aka Cyrus has a R34 GTT PFC in his series one stagea, he says that it runs fine, and was originally putting out 220awkw.

The only problem is he doesn't know how they got the PFC working with the non neo engine.

Apparently it doesn't control the A/C compressor or the engine warning light correctly. I'm sure this could be worked out though.

[RPMGTR]

R34GTT Neo VCT is simply switched just like the earlier R33 RB25. No it is not infinitely variable...I wish...

The VCT gear is different tho and does seem to "switch" on-off more gently than the earlier versions, giving a nicer transition. But we have tested and they are definitely only on-off....

cheers.

[Bass Junky]

Holy Shit.

Ben is posting!

Hi Ben!

[wolverine]

the engine check light on ska's car is probably the traction control on the R34 powerfc. the right voltage to this pin = problem solved.

[beastien]

Cheers guys, very helpful info, only other thing he has a problem with is that the PFC won't switch on the A/C compressor, but I can't see why not, it's exactly the same as an R33 system.

If the output from the ECU is connected up correctly I can't see why it wouldn't work.

[beastien]

I can see why the A/C doesn't work properly, the R33, Stagea and R34 all have slightly different A/C circuits. May take a bit of nutting out to get working sufficiently.

Can anyone tell me if the boost pressure sensor and throttle motor are critical for use with an R34 GTT Power FC? or can I just fool it into thinking these are connected?

[N I B]

R33 and 34 VVT valve is the same and interchangable so theres no problem there.

[beastien]

R33 and 34 VVT valve is the same and interchangable so theres no problem there.

We've cleared that issue, what I need to know is the R34 has sensors that the R33 and Stagea don't have, and will the R34 PFC run correctly without these? eg: boost pressure sensor, throttle motor. and theres also a communication connection between the ECM and the TCS/ABS units.