WGFV port on turbo

Ben Swann benswann at comcast.net
Wed Jun 13 22:55:01 EDT 2007

Didn't get many replies, but found the problem soon after.  Hee hee - did you
all know that your car will run with the MAF disconnected?  At least mine did
- that was the problem.

Now it just tends to boost so quickly that I have been blowing off hoses -
Double checking that the BPV is operating correctly. Just installed a Forge I
had slated for the ES2 conversion: http://www.gtquattro.com/ES2CoupeQ.html -
yes that is the one I bought to Carlisle.

So after driving the CQ without its new engine it is Good to have my avant
back on the road again - clutch had been slipping in 4th and 5th after
addition of wastegate spring,  the timing belt interval was past, although the
one I removed still had a lot of life,  water pump was leaking.  Then the
throwout bearing died catastrophically taking out the timing pin.  

So car has all new clutch, PP,  turned flywheel, release bearing, slave cyl.
New timing belt, water pump, and rear main seal.

Along with that it is sporting a hybrid T3/K26 turbo.  What a pain fabbing up
lines for an aftermarket turbo!  Anyone need a low miles k24?

I'm set to upgrade to 3 Bar soon with larger injectors.

But right now, it is just good to have it back on the road!


-----Original Message-----
From: Adam A. Luy [mailto:Adam at Layer7Labs.com] 
Sent: Wednesday, June 13, 2007 2:59 AM
To: Ben Swann; 200q20v at audifans.com; quattro at audifans.com
Subject: RE: WGFV port on turbo

Hey Ben,

On my '88 5kCSTQA MC1 w/K26 the WGFV has one line to the firewall end of the
intake mani, and the other to a nipple on the first boot coming off the
coldside of the k26.

Hope that helps,


-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of Ben Swann
Sent: Tuesday, June 12, 2007 8:16 AM
To: 200q20v at audifans.com; quattro at audifans.com
Cc: 'Ben Swann'
Subject: WGFV port on turbo

I just got my avant (2C20VTQ) back together after replacing clutch, flywheel,
PP and the release bearing that had disintegrated taking out the flywheel
sensor.  I did a lot of maintenance and cleanup including timing belt and
water pump.  During all this I installed a T3/K26 turbo I got from Javad some
time ago that was removed from my '87 5ktqa that had been in an accident.


This turbo has no port on the turbo that the K24 had.  This port went to the
wastegate frequency valve.  So I blocked the line off.  I am wondering if
having this port is necessary - didn't use it on the 5ktq that had similar one
for the K26, and never had a problem.  Now the car bogs down on acceleration
during the test drive, but I don't see how this port could have anything to do
with that.  If I can get away without installing a port in the turbo, is there
a "best" alternative to connect the line to - like some vacuum port on the
throttle body.  It seems this port on the turbo induces vacuum proportional to
the turbo rpm.


Also, I needed to remove the air intake box because of clearance issues with
an oil line to the turbo.  I plan to make a nice replacement box, but
wondering if this has anything to do with the problem.  Perhaps the car just
needs to clear its throat after all the work.  Many hoses were removed and
cleaned, so there may be some residual water in some and in the intercooler.

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