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Re: [T3] Distributor Drive Question

On Thu, 2005-02-10 at 10:03, Jim Adney wrote:

> > What's interesting here is that all the distributors on the chart were 
> > used on Type 3s, but the #3 retard only seems to start with the 1965 
> > model year.
> Thanks for posting this, Russ. At least we now know that the # 3 retard was 
> real, for at least SOME distributors.

It carried on up into the FI distributors. I have seen it myself. Some
people say that it ended with the '71's, but I cannot confirm or deny
> Scott, maybe I'm confused but it looks to me like there are 6 distributors 
> called out on this page and only 3 of them are type 3 distributors. Or did some 
> early type 3s use 111 dists? Out of those 6, two type 1 dists and two type 3 
> dists had the retarded # 3 cam.

Some of the T-3 distributors don't even have a VW number on them. Just
the Bosch number. Example: ZV/JCU 4 R 3. That is a '64 1500S
> Russ, were there other pages that also showed advance curves for other type 3 
> dists with retarded # 3 cams? Having all the type 3 advance curves posted (at 
> least those not already published in the Bentley manual) would be a valuable 
> thing, but if that's too much trouble, maybe you could just post the #s of the 
> dists with retarded # 3.

I am sorry, but that is the only one I can find right now. 15 years or
so ago, I got rid of a bunch of stuff that I thought I would never have
a use for again. I am regretting it now.

> I should also point out that the charts and numbers are all in DISTRIBUTOR 
> SHAFT DEGREES, so that the 2 deg of retard translates into 4 deg of crankshaft 
> angle, which is what we would see when looking at the timing marks. Four 
> degrees would also be enough that we would be certain this was not just 
> manufacturing tolerances. ISTR that 2.5 degrees on our pulleys comes to about 
> 1/4" or maybe a bit less.

Funny thing is, that VW recommends the timing 2.5 degrees if you
encounter pinging/detonation. About the same as what they retarded #3.

Russ Wolfe
'71 FB AT
'66 FB MT
'64 T34 (not running)
'65 T1 (not running)

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