"DVG...advancing timing"
Dave...
No criticism intended to be sure, but
this is treating a symptom rather than
a cause.
With all due respect.....
hesitation or a "bog" on initial
("off-idle") acceleration need not be
part and parcel of a DVG or DCOE
application ("old wives tale"!:).
Ass-u-m(e)-ing all else is equal
(motor up to spec., timing set according
to mfg., ignition system up to snuff, etc.)
advancing the ignition timing gets
you through the "hole" (improper carb.
setting) faster, is all. Matter of fact,
advanced timing may set up a "stumble"
all it's own and MAY result in "over-
advance" elsewhere in the ignition advance curve, as well as resulting
in
excessive "total timing" at the top end
(unless one recalibrates the curve)
which in view of today's "garbage" unleaded octanes, becomes more of a
problem with compression ratios and
ignition timing curves that were initially
planned utilizing yesterday's more
"manly" leaded octanes.
The very fact you advocate the driver acting as a "manual accelerator
pump" (pump the pedal...it works!) tells
the tale with respect to improper carb.
setting/calibration and/or lack of
needed intake manifold heating to promote better atomization of a
mixture
which is "drying out" (too lean) upon
initial ("off-idle") acceleration.
"Enrichening" (or....maybe more of what's
already "there"?) and/or "heating" (by
water, NOT exhaust manifold) will solve
the problem at it's source. With DCOE's,
going to smaller (3.5) aux. venturi's can
often help solve the dreaded initial "bog"
when the "loud" pedal is used "off idle",
(caused by a sligtly out of calibration
accelerator pump setting(s) by bringing
in the "main" circuit sooner....don't know
about the DVG in this respect but
ass-u-me this might also be the case?
Cap'n. Bob
'60 :{)
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