Q45 Tb Onto S1 Rb25

[Kris..]

have searched this all day and cant come up wit answer

have a S1 RB25, GReddy plenum and have purchased a Q45 TB for it, heres where im a little confused

so this is the Q45 with the TPS taken off

and this is the back of the standard Q45 TPS

now going off all my googling the S1 RB25 TPS is suppose to be a bolt on affair, how the hell is that so

[89CAL]

Well I have a q45 throttle body on mine with an rb25 tps. Has something broken/come out of the q45 throttle body or tps? Mine didnt have a tps on it when I got it but the 25 tps went straight in

[Kris..]

extremely confused, for something so commonly done i cant find an answer anywhere

[Mr.H]

Can't you just swap the 25' TPS Connector/Plug over with a Q45 TPS Connector/Plug....if the wires match.

Edited January 10, 2014 by Mr.H

[89CAL]

if you take the nut off the shaft on the VH45 throttle body, will the TPS fit on then?

[GTSBoy]

No, if you have a look at the two sides of the Q45 arrangement, the drive is not direct from the shaft, the drive occurs from that one ear hung off the throttle shaft pushing on the ear hung off the sensor's shaft. Both those shafts have either a single D flat or a double flat (to locate the ears properly, nothing else). But the RB TPS pictured uses keyways to locate on the throttle shaft. So, not compatible.

[KiwiRS4T]

Just using the RB25 throttle body and TPS with my Greddy copy.

[tricstar]

Looks like the little arm that moves the vq45 tps is mounted on a D shaped shaft, can't you just take that off and the old tps mount and slide the new one on?

[89CAL]

Not the best photo, but it does work

[Kris..]

89CAL if you can be bothered would you be able to unbolt your TPS and take a pic of the inside of your throttle body area where TPS bolts to

[kudos.motorsports]

What you have there is a late model Q45 throttle body which shares the same TPS as the 1995+ R33 RB25DET engines. The throttle body can be modified to suit the butterfly drive mechanism is physically different. my suggest would be to see if anyone with a latter model engine is in the same position and help each other out.

[89CAL]

Im not anywhere near the car till wednesday at the earliest so cant help till then sorry

[Kris..]

all good guys, mate put a neo in his 32 and got the Q45 i needed so we just swapped and now we both have bolt on Q45's that we needed haha

[Kris..]

on what boost? going off graph 21psi? realy low power figure if so