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Re: 1147cc tune-up carb problems

To: spitfires@autox.team.net
Subject: Re: 1147cc tune-up carb problems
From: sinclair@degenkolb.com
Date: Mon, 28 Jul 2003 10:04:10 -0700
Check your vacuum advance - the diaphragm may be shot in which case you're
not getting enough advance when you jump on the pedal.
Also - you can try power-timing - keep advancing the timing, test drive,
listen for knocking, and then back off slightly from there.  You can often
run more advance than the manual indicates.
If the vacuum advance is shot then advancing the timing will compensate for
to some degree - i.e. better acceleration, but it will knock at high
revs/load.

-----------------------------------------
Date: Sun, 27 Jul 2003 09:43:23 -0400
From: "Tim Benner" <tbenner@woh.rr.com>
Subject: Re: 1147cc tune-up carb problems

Thanks for all of your responses.

It revs well from idle (no load).  But this is just blipping the
throttle...
don't want to alienate the neighbors.

Today I will:

Change the dashpot oil  (30 wt OK?)

Recheck the timing.

Drive it again and choke it when it stumbles.

Order some float valves.

After reading the Haynes and Clymer manuals last night the SU doesn't seem
as intimidating.  So I'll get out the spare pair and start cleaning them
up.

Any other recommendations?

Thanks again!

Tim Benner
1965 MK2

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