Club G40 Forum

Technical => Engine and Transmission => Topic started by: liam on August 13, 2010, 09:07:53 PM

Title: 51mm throttle body butterfly
Post by: liam on August 13, 2010, 09:07:53 PM
im having my throttle body ported to 51mm as im fitting a gt manifold aswell but where do i get a larger butterfly from,
also do you get the boost return valve ported where it mates to the TB aswell.
thanks, liam
Title: Re: 51mm throttle body butterfly
Post by: hayesey on August 14, 2010, 09:27:06 AM
not much point porting the boost return but it's worth porting the throttle elbow that sits on top of the throttle body.
Title: Re: 51mm throttle body butterfly
Post by: liam on August 14, 2010, 09:47:44 AM
thats the one i meant i think :-\.
forgive me im not as clued up as some people on here, what about the butterfly hayes can you help me with that one.
Title: Re: 51mm throttle body butterfly
Post by: hayesey on August 14, 2010, 11:15:38 AM
the boost return butterfly or the throttle?  If it's being ported to 51mm then they'll have to make a 51mm butterfly to fit it
Title: Re: 51mm throttle body butterfly
Post by: liam on August 14, 2010, 11:46:32 AM
the throttle body mate, as the title says,
i`ll speak to my mate who`s doing the work and see if he can make one for me as i would`nt really want to atempt it my self.
Title: Re: 51mm throttle body butterfly
Post by: dub-disaster on August 14, 2010, 12:54:52 PM
Pretty sure one out of a mk2 golf can be used think I've got one in the house sum where I'll have a look at it later n let you know.
Title: Re: 51mm throttle body butterfly
Post by: liam on August 14, 2010, 01:22:47 PM
Quote from: dub-disaster on August 14, 2010, 12:54:52 PM
Pretty sure one out of a mk2 golf can be used think I've got one in the house sum where I'll have a look at it later n let you know.
thanks mate.
Title: Re: 51mm throttle body butterfly
Post by: dub-disaster on August 18, 2010, 03:47:57 PM
(http://i673.photobucket.com/albums/vv92/antywill666/photo-5.jpg)
(http://i673.photobucket.com/albums/vv92/antywill666/photo-4.jpg)
this is on from a mk 2 golf gti throttle body I had hanging around dunno if you can make it fit though !!
Title: Re: 51mm throttle body butterfly
Post by: Yoof on August 18, 2010, 05:18:05 PM
Liam- there was a guy selling them on e-bay.de a while back. The chamfer on the edge is key for a good seal, and one that doesn't hunt near idle.

I've fettled mine to the point it hardly hunts, but it's taken about 5 goes of taking it on/off and some wet & dry- proper pita!

Title: Re: 51mm throttle body butterfly
Post by: dub-disaster on August 18, 2010, 06:00:26 PM
Got mine done by juan I know he's banned on here but I think I may end up having to mess about with mine as it doesn't look like it seals perfectly. Only problem is the screws in the butterfly have been centre punched on the back so real pain in the ass to get out.
     Yoof how'd you lock your screws in blue  loctite ?? 
Title: Re: 51mm throttle body butterfly
Post by: Yoof on August 18, 2010, 06:22:42 PM
Yeah just 243 loctite, not had any problems with methanol washing it off either.

Title: Re: 51mm throttle body butterfly
Post by: giorgio on August 18, 2010, 07:01:58 PM
you can buy un drilled butterflies off the internet
Title: Re: 51mm throttle body butterfly
Post by: dub-disaster on August 18, 2010, 08:47:14 PM
Yea wish I'd done my body myself rather than sending it to juan it closes up pretty well but not perfectly.
   Whats best to get screws out that have been Centre punched on the bottom ?? Drill them out n start again ??
    Where abouts can you get blank butterflys ??
Title: Re: 51mm throttle body butterfly
Post by: liam on August 18, 2010, 09:27:41 PM
Quote from: dub-disaster on August 18, 2010, 03:47:57 PM
(http://i673.photobucket.com/albums/vv92/antywill666/photo-5.jpg)
(http://i673.photobucket.com/albums/vv92/antywill666/photo-4.jpg)
this is on from a mk 2 golf gti throttle body I had hanging around dunno if you can make it fit though !!

i`ll ask my mate who`s porting the throttle body if he could maybe machine it down to fit,
is the mk2 tb for sale mate.
Title: Re: 51mm throttle body butterfly
Post by: liam on August 18, 2010, 09:29:57 PM
Quote from: Yoof on August 18, 2010, 05:18:05 PM
Liam- there was a guy selling them on e-bay.de a while back. The chamfer on the edge is key for a good seal, and one that doesn't hunt near idle.

I've fettled mine to the point it hardly hunts, but it's taken about 5 goes of taking it on/off and some wet & dry- proper pita!


cheers pete i`ll have a look on the net now to see if i can find one.
Title: Re: 51mm throttle body butterfly
Post by: dub-disaster on August 18, 2010, 10:27:21 PM
Yea you can have it for a couple of quid if you want it mate make sure you can make it fit first though. 
Title: Re: 51mm throttle body butterfly
Post by: liam on August 20, 2010, 10:16:00 AM
i think i might just de wedge it for now after what pete said i dont want to mess it up ive just got it running sweet now,

i hav`nt spoke to my mate whos doing all the work yet so if he thinks he can make the mk2 golf one fit i`ll take your one dub disaster,

cheers, liam.