Larry G. Miller wrote:
Webers love 3 lbs of pressure under almost all conditions.
It does sound like yr pump is struggling to keep up with the needed
volume!
Alan
> Hi All
>
> Took Bugeye #1 out for its first extended run since completion of the
> engine
> rebuild. All driving to this point had been limited to runs of a
> couple of
> miles or so for tweaking purposes and oil leak checks. Total run
> ended up
> being about 50 miles. The rest of the club went the full 90 or so.
> The good
> news is that the engine ran great.....Most of the time. The bad news
> is that 6
> or 7 times during this 50 or so miles, always while cruising at a
> constant
> speed (about 60), the engine would start to miss sounding like a plug
> wire had
> come off. The first time I stopped to check the plug wires and by the
> time I
> stopped it was running fine again. If I kept driving it would go for a
> minute
> or two (one time it kept up until I slowed down and pulled over but
> didn't
> stop) and then start running o.k. again for a few miles. Every time I
> stopped
> it would be running perfect. I finally gave up and took it home.
> Pulled the
> plugs and they looked o.k., kind of a light tan on the electrode, not
> wet or
> oily, but then it was running well for the last three miles. Pulled
> the
> in-line fuel filter and it seemed o.k. but replaced it anyway. The
> car has a
> new gastank and new fuel lines except for the metal portion that runs
> from the
> tank to the engine bay and it was blown out prior to installation of
> the tank.
> Plug wires, points, condenser, and cap are all new as is the coil.
> It also
> has a new downdraft Webber. I have never messed with a Webber before
> and it
> appears that there is only one adjustment screw besides the idle speed
>
> adjustment. The carb did not come with any instructions on
> adjustments and
> have not got around to finding a good book on the subject. I just
> tweaked it
> to where it seemed to idle the best. Any ideas? Any recommendation on
> the
> Webber book to buy? Could the carb be jetted wrong? These things are
> sold
> with the 1275 in mind so does the 948 require a larger needle to
> provide less
> fuel? How about a pressure regulator, should the Weber have one,
> could the
> fuel pump (new electric) be providing too much pressure? I have a
> feeling
> this is going to be a tough one because it requires a fairly long run
> to
> determine if any mods made a difference. Any and all comments will be
> greatly
> appreciated. This has not been a good week for Spridgets in the
> Miller
> garage.
>
> Larry Miller
|