Paul,
Well Ok I am strictly speaking wrong. However, my Haynes book on Weber ISBN
1 850 10 061 6 is obviously different from yours. Also my Weber book
published by Weber lists only one part number for the accelerator pump jet
and this is: 76226
More than one variant of DGV carb was made and I have known people modify the
pump jet from one carb to fit another - by using a jet from the DFAV, & DGAS.
But because these carbs are synchronised opening rather than staged like the
DGV you need to find a way of blanking off one of the jet holes (if you look
at the DGV you see that while it appears to have 2 jet holes one is in fact
solid). If you use the 2 hole jet one jet sprays fuel against a closed
(secondary) butterfly.
It is also possible to drill any given Weber jet (I think Weber made the
drill bits) to increase the size of the hole.
In any event I doubt very much if a stumble from idle is going to be cured by
an increase in acceleration jet unless Marty is mashing the throttle to the
floor from idle. The DGV will be fuelling from the progression holes at idle
until the primary butterfly opens the idle jet fuels, revs climb and
STUMBLES. Only with further throttle opening the main jet circuit (still all
on the primary butterfly opening) fuels with assistance from the pump jet
circuit. If the carb is running right everywhere aside from idle I don't
think the problem is going to lay with the accelerator pump.
Of course I can't be sure about this because Marty hasn't answered the
questions I posed earlier.
1312
In a message dated 31/10/00 17:38:52 GMT Standard Time,
ptegler@cablespeed.com writes:
<< WHat? Yes it is! So is the pump discharge blanking needle!
Accel pump jets are avail in sizes from
.30 to .65 ( I have .30 .35 .40 .50's in front of me in hand)
accel pump back bleed (called a pump discharge blanking needle
in a DGV) .40 .45 .50 .65 .70
and I'm sure other exist, I just don't (haven't used) have them in front of
me.
check Haynes Texhbook Weber Carb Manual ISBN# 1 56392 157 x
page A1-2 (part 5 Appendix 1) lists some of the variations used for
different
vehicles as OEM equipment. (amoung other listings avail. throughout the
book.)
Paul Tegler wizardz@toad.net www.teglerizer.com
>>
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