Scot
Most of us racers forgot about the stock ignitions, but I think yours goes
to the carb venturi which provides more vacuum with increased RPM, thus
increasing the lead. Yours has a problem like a leaky diaphragm maybe.
Anyway that setup didn't work very well in 1949 when they were new, so I
would get a Mallory with pure centrifugal advance.
Dave the Hayseed
Racing with Mallorys
----- Original Message -----
From: scott <saltrunner@montana.com>
To: land- speed list <land-speed@autox.team.net>
Sent: Saturday, May 12, 2001 9:36 PM
Subject: Flathead ignition quirks..
Hi list, consider the following scenario. I just rebuilt a late flathead
v8,
and am trying to final tune it. its basically stock with a stock
distributor,
rochester 2-jet carb,and 6-volt system. It starts and runs great! I timed it
strait up on the mark, but when i hook up the vacuum line, it almost kills
the
motor and runs terrible. It acts like its pullin too much vacuum, cause if i
pinch the hose it smooths out. Is it supposed to hook up to manifold vacuum,
or a less amount? Or is my dist. wore out? The advance mechanism is intact
and
seems to work. What am i missing? I havent worked on one of these in 10
years,
but i dont remember havin this problem before. somethin silly im sure.
Thanks
for your input...... Scott
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