Bob: I don't know anything about SU carbs, but....there are two different
vacuums in a carb. The manifold vacuum, which is highest at idle and lowest at
full throttle, and the venturi vacuum which is opposite. Do the two types of SU
carbs you are monkeying with take the vac. from the same relative place? In any
event, why would this cause stalling on hard braking?
Geoff Branch
'74 Meejit "Yellow Peril"
'72 Innocenti 1300 Mini
----- Original Message -----
From "Mueller, Robert CDR" <RMueller at grumobile.uscg.mil>
To: <Midgetracers@aol.com>; <John.Deikis@med.va.gov>
Cc: <spridgets@autox.team.net>
Sent: Tuesday, January 08, 2002 1:03 PM
Subject: RE: distributors
> Hey all,
>
> I've still got my wierd carb problem of stalling under hard braking (float
> bowl is level with ground, float is set at max (lower makes it worse). But
> after a frustrating weekend, I figure if I cut down on known problems, maybe
> that one will get resolved as well. As you know, I converted my otherwise
> stock 1275 Midget from dual 1.25 SUs to a single HS4 on an Oselli
> Torquemaster manifold. The distributor is a stock vacume advance, but I've
> been told the vacume off the old twin SU manifold is different than off the
> new Oselli single carb manifold - like the distributor now "sees" the vacume
> from all four cylinders when before it only "saw" vacume from two cylinders.
> Is this the case? How in the world do I fix this? Who in this country
> would know how to reset the distributor for the correct vacume (since mini's
> aren't all that numerous over here).
>
> Bob
> '74 MG Midget
> '90 944S2
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