Re: [T3] Update on 1500N poor performance

["Mark Seaton" <Markse@mo-sys.com>]

OOPS- sorry Ben- didn't register the title of the email- I thought you were
talking about dual solex's and I know absolutely diddly about the single
carb so please just ignore me!

Mark
----- Original Message -----
From: "Ben Doughney" <ben_d@clear.net.nz>
To: "Type 3" <type3@vwtype3.org>
Sent: Wednesday, May 28, 2003 11:14 AM
Subject: Re: [T3] Update on 1500N poor performance


> on 28/5/2003 9:34 PM, Mark Seaton at Markse@mo-sys.com wrote:
>
> > Hi Ben, I think there are 2 ball valves in the accelerator pump circuit
and
> > I think they are blocked off with brass plugs so this sounds about
right. Is
> > it noticeably different from the other carb?
>
> Yes, I haven't seen a piece like this on any other VW-Solex carbs. This
carb
> does have a ball bearing non-return valve on the intake side of the
> accelerator pump, but on the outlet side it has this extra valve. It is
> pictured in the Haynes manual, page 64, item 30.
>
> > Is it meant to be removeable?
>
> Yes, it just floats up and down in a drilling on the outlet side of the
> pump.
>
> > I'm not 100% about this, but I don't think the power circuit is designed
to
> > work when the car is struggling up a hill- more for flat out under
normal
> > conditions like overtaking- could well be wrong though. I have some
carbs
> > that don't even have the power circuit tube. I think the accelerator
circuit
> > also comes into action as a kind of power circuit under extreme vacuum
> > conditions so if thats not working it might explain a lean condition.
>
> I am not totally sure where the outlet tube for the power circuit is on
> these, the manual isn't completely clear? I know it has something to do
with
> the accelerator pump circuit, there is another ball bearing valve below
the
> diaphragm that opens after the accelerator pump has bottomed out.
>
> I just remembered something that I forgot to mention in the previous
email-
> it does rev out better now- 40MPH in 2nd, and 60 in 3rd, but still a bit
> sluggish in 4th. I think just driving it has cleared it up a bit or
> something. I did a product called 'fuel set' in last time I filled up with
> petrol. It is supposed to clean the fuel system out and decarbonise
things,
> I am not sure if it is actually doing anything but I thought I would give
it
> a try.
>
> >> This weekend I will completely disassemble the carb and blow all of the
> >> passengers out, to make sure there are no blockages there, and also
> > recheck
> >> the valves.
> >
> > You don't want any of those pesky passengers hitching a ride and slowing
you
> > down- blow them all out of there- I'm sure it will help solve all your
> > problems ;-)
>
> Whoops, that spell checker again! ;-) I will blow the passages out, I
don't
> think I have any passengers in my carb!
>
> Ben Doughney
>
> '75 1200L
> '63 1200 - Ringo
> '71 1600TL
> '65 1500N - Val
>
> http://members.tripod.com/~superkafer/
>
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