Urgent!! HELP!! Greddy Plenum for R33 GTST..

[sidewaymambo]

Hi, Guys

Some questions rising during my modification; I have Greddy Plenum with Q45 (infinite) throttle body and discover that I no longer able to use my stock throttle cable (cable is longer), and the throttle position sensor harness is different (alougth both 3 wires), so question are:

1) What throttle cable did you guys use?

2) How you wire up Q45 throttle position sensor to stock throttle position harness?

3) If you still have the Greddy plenum manual, what does it talk about on the 3-12 (page 20)..

all help appreciate...

Phillip

[G0DF4Th3R]

might wanna PM GTST VSPEC

he uses a Greddy plenum

[GTS-t VSPEC]

Phil, I'll get back to you tonight about it with details of mine:D

[carlo]

I am buying one of these in a few months. So remember what you did so I can ask.. hehe

[sidewaymambo]

yes..please...

[T0nyGTSt]

custom throttle cable. They should be able to cut one to length.

T.

[B-Man]

Good luck - I'm keeping an eye on this thread cause I am just about to order a GReddy plenum from Greenline - (Thanks Carlo)

[DoughBoy]

A Silvia or 180SX throttle cable fits. A GT-R has the same connectors to suit the Q45 throttle body, and have never seen the manual so can't help on the 3rd quiz.

[sidewaymambo]

Hi, DoughBoy

Thanks for the replied.

Do you still remember what's the pin assignemnt on the connector? there are PWR, signal and earth..I assume that I can cop the wire and connect both together?

[adznight]

Hey while your at it, I'm looking to put a Greddy plenum on my RB25DET-NEO but I'm not sure if it will fit coz of the top feed injectors? Does anyone know anything bout this? Cheers!

[GTS-t VSPEC]

Adzman, I replied to your question in the other thread:D

sidewaymambo, I originally had the stock throttle body with an adapter plate, and we were able to use the stock throttle cable and TPS. I later had a custom throttle body (90mm) made, and we were still able to retain the stock throttle cabel, and used a TPS from a Holden, which we got from Conventrys, as it had the same pin arrangement.

After a while we had a custom throttle cable made, as the stock one was starting to catch as it was at an odd angle. You can have a custom cable made to any size you like.

I would imagine that the TPS on the Q45 would be very similar, with two wires acting as a potentiometer and one acting as the stop switch.

Hope that helps.

Paul

[B-Man]

TPS = Throttle Position Sensor right ? I don't know that my XF TB has one of these. - I'd better check that .... hmmmmmm

[GTS-t VSPEC]

Yeah, sorry. The TPS is like a potentiometer, it varies the voltage signal out depending on how open the throttle is. Aslong as the signal range is the same then you should be able to tune the car with the larger throttle body no probs:D

[B-Man]

And the TPS feeds back to the ECU right ? What happens to the output of this ?

Does the TPS output combine with the AFM output for the ECU to make decisions ? Is this ECU dependant or is the TPS & AFM outputs independant ?

I don't know if that quesiton made much sense.....? I hope you understand what I mean ?

[DoughBoy]

TPS, AFM, RPM, O2, water temp all assist the ECU making decisions on fuel requirements. Some aftermarket ones use different inputs. There might be more like MAP etc.

[sidewaymambo]

Thanks GTS-t VSPEC, I will think into it..

also got some hint from SydneyKid..he suggest adapted the rb25 TPS to replace the TPS on the Q45 throttle body..will try this tomorrow..will keep you guys post

[Steve]

sidewaymambo,

I am having my TB replaced with a ford item, it has a two position sensor (on/off) and the guy who is fitting it said it is quite easy to adapt the stock TPS to the ford TB

Also, I am using a GTiR throttle cable that fits quite nicely, also you can get the stock ones shortened so I am told.

[GTS-t VSPEC]

Good luck with it all, keep us posted on the results. It looks like alot of people are doing the Greddy plenums, so the more info about it on the forums the better:D

[sidewaymambo]

Originally posted by DoughBoy

A Silvia or 180SX throttle cable fits. A GT-R has the same connectors to suit the Q45 throttle body, and have never seen the manual so can't help on the 3rd quiz.

Hi, DoughBoy..

silvis or 180sx, did you refer to the SR20DET or CA18DET? thanks

[R33NT]

Go to your local motor bike shop they will be able to extend the length of your throttle cable easily. From memory it cost me $30.................