[T3] crank case ventilation ???

[Keith Park]

I did the hose connections on the T4 engine over the weekend, its
interesting that in 73 and 4 they were still using the D version of our Djet
And still using vacuum retard.  Interesting that in 74 the Throttle bodys
only had a nipple for the retard on the can and left the vacuum advance part
of the can attached to a "hose to nowhere" from the factory.

The retard nipple is right under and just inside the idle position of the
throttle valve, while the advance nipple is just on the air cleaner side of
the valve (if equipt) so it only gets advance under light throttle.

Unfortunately, the Throttle body Im using is a 45mm without the advance
nipple, so I cant run any vacuum advance, but do I really want to use just
the retard?  I need any extra gas mileage I can get, should I try to find a
45mm throttle body with an advance nipple?

Hmmm....

Keith


Top Notch Restorations
topnotch at nycap.rr.com 
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback "Hothe"
65 Notchback "El Baja Rojo"
65 Squareback "Eggcrate"
87 golf "Winterat"
93 RX7 "Redstur"

-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org
[mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim Adney
Sent: Sunday, June 23, 2013 11:28 PM
To: type3 at vwtype3.org
Subject: Re: [T3] crank case ventilation ???

On 23 Jun 2013 at 17:15, Daniel K. Du Vall wrote:

> Does anyone have a good diagram of the hose routing for a 72 SB FI
> system? Or even just pointers as to what is what and where? Just trying
> to figure out that ports and need to cap and where the hoses from the
> heads and PCV go to etc. Have no idea since I had nothing to start
> with. 

Glad Dave was able to send you a PDF. The '72 is certainly the worst 
year for this. One thing you can simplify for that year is to omit 
the solenoid valve that enables the vac advance in 4th gear only. The 
car will run and tune up just fine with the vac adv hose connected 
directly to the IAD. Note that you will have to have a '72-only IAD 
to connect the vac retard. That part is essential, unless you want to 
"upgrade" to the '73 configuration, which does not have the vac 
retard. (FI engines came with vac retard only in '72.)

> Oh and not to bug Jim but have you had a chance to look into the air
> filter to body parts I need to make the connection? I sent you the
> measurements a while back you requested if you need them again or did
> not get them let me know. 

Sorry, I knew there was something I kept forgetting. I'll try to 
remember to look for the parts tomorrow. I'm pretty sure I have them; 
I just have to measure them and make sure they're right for your car. 
Yes, I'm sure I still have your old message with the lengths.

-- 
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************

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