Re: [T3] Another distributor question

[Jim Adney <jadney@vwtype3.org>]

On 19 Oct 2003 at 13:49, Mark Seaton wrote:

> From: "Jim Adney" <jadney@vwtype3.org>

> > On 16 Oct 2003 at 14:07, Mark Seaton wrote:

> Thinking about it that seems strange as the vacuum take off is very close to
> the idle throttle position- as if it was meant to give the max vac signal at
> initial acceleration as I'm seeing- to coincide with the max richness from
> the accelerator pump.

It's quite difficult to visualize what's happening vacuum-wise around the 
throttle plate. It all depends both on throttle plate position and the amount 
of air passing by.  

> I (shock horror, slapped wrists ) don't own a Bentley as the haynes covers
> most of what I need with the carbs but doesn't give the advance curves- does
> anyone have them scanned and available online, or could send them to me?

I realize that the Haynes seems to have most of what you need, but you'll never 
appreciate what you're missing until you get a Bentley, too. There's just a 
world of stuff in there that the Haynes skips over.

> > This port is in the throttle body, isn't it? Have you changed throttle
> bodies?
> > If so, consider changing back, but I don't know if you can mix and match
> > throttle bodies and carb bodies (are they even separate parts???)
> 
> Yes they are! and yes I have but I put the original throttle plates on that
> came with this car and this dizzy so they should be matched.

It's still possible that these are the wrong throttle plates, and that the 
passages were once blocked by dirt, etc, and now you've cleaned them and 
they're working again. I agree that that's unlikely, but I don't have an 
alternate explanation for your observations yet.

Does this vacuum pass thru the jasket that seals between the throttle body and 
the carb? If so, is it possible that you had the wrong gasket there, or the 
right gasket placed the wrong way?

> BTW its a "J" model distributor (can't remember the other numbers)

Unfortunately, that version is not covered in the Bentley, since it was not 
used in the US, but you'll find that the similarities are still sufficient for 
it to be a big help.  

-- 
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Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
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