john banks

VF22:


VF34:

(different orientation of picture and fitted with rubber hose already)

[Edited by john banks - 7/6/2003 6:51:31 PM]

john banks

Seen two VF34s on MY99/00 UK or STis now and both had the compressor outlet nipple orientated horizontally instead of vertically. The rubber hose used therefore interferes with the breather hose (that links the two rocker covers), and in one case this has led to splitting of the boost control hose with resulting overboost. (1.3 bar mapped, 1.65 bar with light detonation was the result). The split was underneath and so could not be readily seen. I've asked sg72 if he has any pictures he can put up. I've always found these nipples to be non-rotating on other turbos, which is probably a good thing given the pressures they see.

Any one with a VF34 might or similar on a car which did not come with it might want to have a look to check, and anyone that has sorted it please say how.

sg72

As you say John.

The boost control hose does interfere and cause chaffing.

This has resulted in loss of control with, overboost/fuel cut as a result.

I however managed to move the pipe connection to a more rubber hose friendly position.

I was originally intending to bend the connection but found it moved quite readily.(With the help of a Ring spanner)

john banks

Guess they are supposed to be able to rotate then, they've always felt firm on other turbos, but I've not tried to seriously move one before.

sg72

Please note

I only turned it enough to allow pipe to fit free from interferance.

however on todays trials. It seems to have worked.

john banks

Picture from Steve with nipple rotated to clear breather hose.

Yes it is running a Dawes on an STi It is mapped for it.

RT

John, FWIW, my VF30 onboard my JDM STI7 type RA has the same orientation as the VF34 pictured.