I should have stated that it does it with all combinations of the listed
components and that the current setup is:
40 DCOE (new)
Aldon Yellow (new)
Lucas Sport Coil (new)
Shirtless Larry
----- Original Message -----
From: Ulix Goettsch <ulix@u.washington.edu>
To: Les Myer <lesmyer@geocities.com>
Cc: <spridgets@autox.team.net>
Sent: Friday, April 16, 1999 3:51 PM
Subject: Re: Constant Speed Sputter
> A quick way to test Les' theory: Since you have a front hinged bonnet,
> prop it open ~1" at the rear next time you drive on the interstate.
> Giving the air a way out of the engine compartment will greatly improve
> airflow and cool down your carb.
> Ooops, I just remembered you are using a DCOE, right?
> Hmmmm....
>
> Ulix
>
>
> On Fri, 16 Apr 1999, Les Myer wrote:
>
> > Sounds like vaporlock at the rear carb to me (from heat).
> >
> > Try this. Install a fuel bowl top from a front carb on the rear carb.
Now
> > you have an outlet for a fuel return line, similar to what was seen on
most
> > air conditioned cars of the 70's. Run metal fuel line back to the
tank -
> > you will have to make a fitting to dump the gas back in the tank.
Install
> > a restrictor in the rubber hose that leads from the rear carb to the new
> > metal fuel return line. This can be made from a short section of metal
rod
> > and a very small drill bit, and will control the rate of flow back to
the
> > tank. Too big and you will loose pressure. Too small and it won't be
> > effective. Shove this in the hose and put a hose clamp on it to keep
gas
> > from leaking by.
> >
> > I did this same kind of trick with the Holley carb on my 355 C.I. Chevy
> > Monza. It was boiling the fuel in the secondary fuel bowl (fell flat
on
> > it's face when you opened the secondaries - after driving at speed).
this
> > fixed the problem. Tapped the rear fuel bowl and installed a fitting.
> > Fotunately I was able to use the vapor return line for the fuel return
line
> > (vented the cap with a drill bit).
> >
> > Some cars have poorer air flow through the engine compartment itself, at
> > speed. This Monza was definitely one of them. I have noticed that
> > Spridgets seem to run quite hot when you get past about 70MPH, for any
> > lenght of time - no apparent reason.
> >
> > Another trick I have used is to wrap aluminum-faced tape around the
(very
> > heat-absorbing) black rubber fuel lines. Makes a difference.
> >
> > Les Myer
> >
> > At 08:51 AM 4/16/99 -0700, you wrote:
> > >I have posed this puzzle to the list before but since we have a lot of
new
> > >people I thought I would try it again.
> > >
> > >The engine in my Bugeye runs great 99% of the time. When driving at a
> > >constant speed in 4th or 5th above about 3500 RPM it will occasionally
start
> > >to sputter real bad.
> > >
> > >If I let off the throttle, press the clutch, and let to RPM's drop to
idle,
> > >the miss goes away. No other action will make it stop. I've tried less
> > >throttle, more throttle, etc. and it just keeps sputtering until I let
it go
> > >to idle.
> > >
> > >This happens randomly but always under the same conditions. It never
happens
> > >around town in stop and go driving, only on the open road. Some times
after
> > >a mile or so, some times after 20 or 30 miles, some times never.
> > >
> > >This engine has been in two different cars with different fuel and
wiring
> > >systems.
> > >
> > >One car has a new gas tank with all new 1/4" gas lines and the other
has a
> > >"renu" gas tank with all new 5/16" gas lines.
> > >
> > >The following components have been installed in just about every
possible
> > >combination:
> > >
> > >1. Three different carburetor and manifold setups, 1.25 SU's, Weber DGV
> > >downdraft, and Weber 40 DCOE.
> > >
> > >2. Two different distributors, a stock vacuum advance and an Aldon
Yellow
> > >centrifugal advance.
> > >
> > >3. Three different fuel pumps with and without a fuel pressure
regulator at
> > >various pressure settings.
> > >
> > >4. Three different coils, a stock Lucas coil with external ballast, a
hot
> > >Crane coil with external ballast, and a Lucas
> > >sport coil.
> > >
> > >5. Various types of plugs, plug wires, points, distributor caps,
rotors,
> > >etc.
> > >
> > >
> > >
> > >
> > >
> > >Larry Miller "A Fool (For LBC's) And His Money Are Soon Parted"
> > >59 Bugeye (Being Ripped Apart)
> > >60 Bugeye (Willie Nelson)
> > >78 911 SC Targa (Faster than a Bugeye but not as much fun)
> > >Home Page http://ado13.com
> > >Spridget List Member Input Form http://ado13.com/listinfo.html
> > >Spridget List Member Info Page
http://ado13.com/list/email/files/list.htm
> > >
> > >
> > >
> > >
> >
>
> Ulix __/__,__ ___/__|__
> ..............................................(_o____o_)....<_O_____O_/...
> '67 Sprite '74 X1/9
>
>
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