air box

Mon Jan 31, 2011 8:00 pm

hi guys,got my engine in but have hit another problem.ive used mk1 golf gti servo but i still dont seem to have enough room for the air box.mines the metal box type with the plastic connection pipes,do these have to be shortened?or do i need the other air box?any help before i attack it with hacksaw.cheers.

Mon Jan 31, 2011 8:48 pm

Have you moved the servo across 55mm to 60mm

Mon Jan 31, 2011 8:57 pm

no,i didnt no i had to if using the golf servo?

Mon Jan 31, 2011 9:04 pm

moggie wrote:no,i didnt no i had to if using the golf servo?

No chance of using any sort of vacuum servo in the standard location with an S50 I'm afraid. Oh, and please don't be tempted to put a big notch in the plenum. You'll only succeed in blocking half the air flow into No6 cylinder.

Ian.

Mon Jan 31, 2011 9:11 pm

why cant you shorten every connection pipe from the airbox to the engine,thus moving the complete air box away from the servo

Mon Jan 31, 2011 9:16 pm

You can, if you dont mind having the ECU re mapped to suit...

Mon Jan 31, 2011 9:27 pm

looks like im moving the servo then,there looks like enough room to do it with the engine in.cheers guys.how do you modify the connection bar that runs behind dash?

Mon Jan 31, 2011 10:16 pm

You got to get a E34 brake rod and shorten it to the required length and tap a new thread on the end of it after cutting.

Mon Jan 31, 2011 10:55 pm

moggie wrote:why cant you shorten every connection pipe from the airbox to the engine,thus moving the complete air box away from the servo

Those pipes are shaped to fit into the ends of the throttle bodies (with an o-ring seal), so you can't trim that end. The other end is a bellmouth, so you don't want to be touching that either.

Tue Feb 01, 2011 7:59 pm

what i meant was cutting a section out of the middle and joining back together with samco hoses.im going to do right and move servo it was just a thought

Tue Feb 01, 2011 8:16 pm

I never understand why people always mess with the important bits instead of removing/moving the obstacle/offending unimportant bit.

but obviously it can't be that bad looking at the number of butchered plenums I have seen and NO engine failures reported. Or is everybody just keeping quite???

Tue Feb 01, 2011 9:01 pm

UweM3 wrote:but obviously it can't be that bad looking at the number of butchered plenums I have seen and NO engine failures reported. Or is everybody just keeping quite???

It's not so much that the engine will fail, it's more that it won't make all the power it should.

Ian.

Tue Feb 01, 2011 9:55 pm

ian332isport wrote:
UweM3 wrote:but obviously it can't be that bad looking at the number of butchered plenums I have seen and NO engine failures reported. Or is everybody just keeping quite???
It's not so much that the engine will fail, it's more that it won't make all the power it should.

Ian.

Wait till the manifold doesnt fit and a M50 cast manifold goes on