The mechanic i goto and my mate goes to, a guy there offered my mate a bigger VL throttle body. I thought straight away, XF throttle body, but apparently its a VL throttle body that has had the inside of them bored out or honed out more.. anyone heard of this? any gains? cheers. Tim.

Here is a pic of one: Quote: Originally Posted by white_vl_bt1 The mechanic i goto and my mate goes to, a guy there offered my mate a bigger VL throttle body. I thought straight away, XF throttle body, but apparently its a VL throttle body that has had the inside of them bored out or honed out more.. anyone heard of this? any gains? cheers. Tim. Some original photos have not been recovered yet.

how much......????

http://www.commsport.com.au/category47_1.htm sell them. Its $345 for throttle body and plenumn or $200 exchange.(I think its exchange, I don't know what core deposit means.)

on a side note, you can do this mod to any tb. port it slightly and make a new butterfly to suit, pretty basic stuff. -jimmy

I can get it done for $100 through my mechanic. Do you think its worth all the effort? i mean what are the gain going to be?

is that for the plenum aswell?

yeah the standard plenum.

so the plenum doesn't get ported to match? i haven't done this but from the other threads on this mod i gather that it may be a waste of time and money if the plenum is left standard. someone who has done it may want to back me up on that.

the throttle body is made of thickish steel, so when you bore it you only bore the inside out to make it bigger, hence the outside diameter of the thing remains the same, enabling it to retain the standard plenum. if a different throttle body is used (XF, RB20) then you will have to get the plenum hole enlarged because the outside diameter is different.

so whats the point of opening up the t/b if you still have a restriction in the plenum opening?

bore that out aswell?

you don't have a restriction in the plenum because the hole in the plenum is the same size as the outside of the throttle body, you're only altering the inside diameter to allow more flow.

oh ok. so those commsport ones wouldn't need the plenum to be ported either. they are like 300 or 400 exchange so i think $100 would be a good deal then.

Maybe they port the runners out a bit.

Are NA and turbo TB's the same?

pretty sure!

As stocky said, the standard plenum hole is the same size as the outer diameter of the throttle body. As far as i know, its ONLY the THROTTLE BODY that gets machined to the same diameter of the plenum hole. As i find out more i'll try and tell ya's.

I just got an email back from commsport and the price is $345 if you supply one urself. Thats a bit steep.

Quote: Originally Posted by ijd I just got an email back from commsport and the price is $345 if you supply one urself. Thats a bit steep. Dont AVO do a bored out throttle body for the VLT? Cost from memory is $200 change over.I think they are bored out to 63-65mm, but not 100% sure.This is a bolt on replacement part. Maybe check out there website. PSI.