Throttle body trumpets

r10crw · Post by **r10crw** » Sun Nov 13, 2011 8:13 pm

These are all slack on my car. Held in with three cap screw but the thickness of the backplate means they don't get compressed. Must be fairly common so what's the best solution, drop of araldite on the sides of the trumpets? With the engine idling they rattle something chronic.
Craig.

hiscot · Post by **hiscot** » Sun Nov 13, 2011 9:02 pm

craig very small fibre washers , put a slight flat on them on one edge they will grip the trumpets when tight , the washer wants to be slightly bigger than required if you understand

r10crw · Post by **r10crw** » Sun Nov 13, 2011 10:04 pm

Sounds good Bob. I've got a selection box somewhere.
Craig.

hiscot · Post by **hiscot** » Sun Nov 13, 2011 11:00 pm

yer craig they are just ba size you may only require 2 per trumpet its been a while since i did it

Rich H · Post by **Rich H** » Mon Nov 14, 2011 9:07 am

I have a large box of BA screws if you ever need any.

r10crw · Post by **r10crw** » Mon Nov 14, 2011 1:19 pm

Thanks Rich but should have the correct size. The old ones were a PITA to come out, the heads are made of cheese so need Vice grips for several of them!

dvandrews · Post by **dvandrews** » Wed Dec 14, 2011 10:29 pm

If you peen around the base of the trumpet it will stretch the length of the trumpet slightly, this will raise the shoulder WRT the backplate and give more purchase to the clamp bolts. I have done this on around a dozen sets.

Dave

roadboy · Post by **roadboy** » Thu Dec 15, 2011 12:11 am

Ay up Dave! What brings you to these parts? Actually, its ok, I can guess!

Must give you a call about cam timing actually.

All the best.

Dan

tut · Post by **tut** » Thu Dec 15, 2011 12:28 am

Your first post Dave, so welcome to Scottish_Elises.

Your name comes up on here quite often, but in the nicest possible way.

tut

Peter · Post by **Peter** » Thu Dec 15, 2011 9:14 am

Craig, make sure you do it as worse case it can send the stud down the throttle body and Boom!!
I have pics to prove it somewhere...

---
I am here: http://maps.google.com/maps?ll=56.061723,-3.394773

r10crw · Post by **r10crw** » Thu Dec 15, 2011 10:47 am

Peter wrote:Craig, make sure you do it as worse case it can send the stud down the throttle body and Boom!!
I have pics to prove it somewhere...

---
I am here: http://maps.google.com/maps?ll=56.061723,-3.394773

No worries mate they were put in with locktite so should be fine.

Nice to see you on the forum Dave looking forward to some of your informative posts.

dvandrews · Post by **dvandrews** » Fri Dec 16, 2011 10:33 am

Thanks for the welcome chaps, you know I'll do my best to help when I can.

Dave

KingK_series · Post by **KingK_series** » Fri Dec 16, 2011 12:57 pm

r10crw wrote:These are all slack on my car. Held in with three cap screw but the thickness of the backplate means they don't get compressed. Must be fairly common so what's the best solution, drop of araldite on the sides of the trumpets? With the engine idling they rattle something chronic.
Craig.

The elegant way to do it is to Skim 0,2mm from the TB face.

However fitting a longer carbon trumpet and deeper airbox will make the engine far more tractable and so much less peaky with no top end loss, it's worth a thought. -

Scottish Elises