[ROVERNET - UK] hesitation blues
Slatskars
slatskars at comcast.net
Mon Nov 27 06:02:12 GMT 2006
Peter,
You also want to check the carb float levels. The level in the float chamber
is also the height of fuel in the jet. This is like a coarse adjustment.
Adjusting the jet is the fine tuning.
Slats
----- Original Message -----
From: "peter king" <peter at king-co.com>
To: <rovernet at lyris.ccdata.com>
Sent: Sunday, November 26, 2006 7:38 PM
Subject: [ROVERNET - UK] hesitation blues
> Hi all.
>
> I installed the carburetors I rebuilt this weekend, and the good news is
> that I discovered that a problem I was having with stalling at a full
> stop was due to a missing roller at the accelerator damper. The bad news
> is that I'm still getting hesitation when I begin to accelerate from a
> stop. I also get some hesitation when I turn a sharp corner at low speed.
> I swapped my newly-purchased needles with the thinner needles that were
> in the old carbs, and noticed an improvement overall, but not at the
> beginning of acceleration. If I choke, I get much improved acceleration
> throughout the range. Without choking, acceleration is steady through the
> range, after the hesitating start, but more sluggish. My U.S. spec carbs
> were installed with lock-tabs on the jet adjusters, allowing only for a
> 3- flat leaner adjustment. If choking improves performance, then a richer
> mixture is needed, no? Should I be looking at removing the tabs and
> enriching the mixture? Could it be a weak fuel pump-related problem? Or
> something a different needle might cure? I read an interesting article on
> tuning SU carbs today that suggested a great deal of improvement can be
> had by proper needle selection. ( here's the link to the article:
> http://www.team.net/www/morgan/tech/ tuning.html )
>
> I've re-checked the timing, and have Pertronix ignition installed, so for
> now I'm ruling that out.
>
> Any thoughts on trouble shooting?
>
> Thanks,
>
> Peter
>
>
>
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