Intercooler blow-out and by-pass valve

[Efraim]

Hi Peter,
You need 475 Ohm 1/8W resistor and 4.3V zener diode. This, along with
adjustable wastegate cap, will allow you to get 2.0 Bar or slightly more. I
saw 2.0 Bar on my auxiliary gauge when I was tuning the WG spring, but I
relaxed it up to 1.8Bar as I love my car too much to risk damaging it.
1.8Bar is much safer for older car like mine.
For resistor color code go to:
http://www.rfcafe.com/electrical/resistor_markings.htm
It should have yellow-violet-green-black stripes plus another stripe of any
color (defining the tolerance which is not important for this application).
If you need more details please let me know.
Efraim
'88 5KCDTQ  324K km (201K mi) , 1.8 Bar
'90 90 100K km (62K mi)
Vancouver, Canada

----- Original Message -----
From: "Peter Berrevoets" <pjberr at home.com>
To: "1 Quattro List (E-mail)" <quattro at audifans.com>
Sent: November 29, 2000 1:38 PM
Subject: RE: Intercooler blow-out and by-pass valve


>
> Thanks for the reply and the previous mod. doc.
>
> I haven't installed the bypass valve yet, but the parts I'm going to use
are
> a rad hose from the Canadian Tire parts bin, and some ABS plastic
fittings.
> I will tap a hole in the intercooler passenger side for one hose and fit a
> copper 'T' into the metal downpipe just in front of the turbo rubber
intake
> boot. Total parts aside from the valve itself totaled ~$20.00 CDN
including
> stainless hose clamps, pipe fittings, vacuum hose and the rad hose.
>
> I'll let you know how it all works out - and yes Rob Myers felt that the
> strapping was not necessary with the valve in place.
>
> BTW - if I want to cap at 2.0 BAR what would the required resister value
be?
> Not being into the electronic details, what would the colour coding on a
> resistor be for the different max boost values?
>
> I am under the impression that at about 2.0 BAR the CIS has reached max
> output and any more boost will result in a lean burn situation, or does
this
> happen earlier?
>
> Thanks again,
>
> Peter Berrevoets
> 1990 200TQ
> Toronto, Canada
>
>