Board logo

Rover 25 Throttle body question?
r1_pete - 14/12/16 at 03:56 PM

I'm planning on using 2 Rover 25 throttle bodies on my RV8, as they'll cost me a fraction the price of 48mm jenveys..

Can anyone tell me what purpose the steel segment screwed to the butterfly serves? all I can think its some form of damper, I'd like to remove them and plug the holes by threading, screwing a brass screw in, soldering, and smoothing.... but not if there is a tangible purpose to them.

R25 Throttle Body 2
R25 Throttle Body 2

R25 Throttle Body 1
R25 Throttle Body 1

simon h - 14/12/16 at 04:06 PM

They are a 'drivability wedge'

It shapes the throttle airflow on small throttle openings to make it easier to drive and stops the sudden rush of air.

You wont gain anything in removing them really unless the throttle is too small and then there may be a tiny reduction of airflow on WOT.

If they are too small better to get a pair of the VVC160 ones than mess about with them. They 160 ones will bolt straight on where these do.

MikeRJ - 14/12/16 at 04:14 PM

quote:
Originally posted by simon h
They are a 'drivability wedge'


Yep, there's even a Patent on the idea.

[Edited on 14/12/16 by MikeRJ]

britishtrident - 14/12/16 at 04:16 PM

As above they are soley to make the throttle more progressive no real performance peanalty, you will find easier to get 48mm throttle bodies on one of the bigger Rover models such as a 45, a 75 or a Freelander.

r1_pete - 14/12/16 at 05:00 PM

Wow, Thanks guys, that's my learning point for the day.

I'll leave them where they are then, I'm going for torque and drivability rather than all out BHP...

Cheers.