<VV> Adjustment of Accelerator Pump Linkage
deltainc at grm.net
Sat Jul 10 15:56:38 EDT 2010
----- Original Message -----
From: <Mikeamauro at aol.com>
Subject: <VV> Adjustment of Accelerator Pump Linkage
> I'm looking to increase the amount of "squirt" from my carbs. To do so,
> before enlarging the pump orifices in the carb throat, I'd like to first
> an accelerator pump linkage adjustment. >
> My 67 110, PG tends to tip lean when accelerating quickly from an idle.
> Consequently, there is a momentarily lag in acceleration. There is NO lag
> when acceleration is gradual, and engine is allowed to pass the "just off"
> idle point prior to getting into the gas.
Hi Mike; if you don[t have people with no sense of humor driving the car for
pepsi-runs .... heh .... you might try a crutch that I use for similar
situations ... just dial the main idle fuel adjustment ( mixture needle )
richer... that way the rich mixture lasts up the rpm band quite a bit
longer, and kind of replaces, or compliments the acceleration pump squirt
( and even somewhat the power circuit, if you have one ) .... it will maybe
load up at idle, but you can just blip it and clear it out every few
This also helps with the cheaper Holley, not-double-pump carbs that I, being
a cheap-butt, use on my SBC s ;;;;; hey ... one good thing ... makes your
over-rich idle sound like 2 grades hotter cams ....
For grins, sometime you might run the engine on just a real rich idle mix
( thru the needles ) and be amazed at how fast you can cruise, just using
the " idle " circuit " ... I have come to think of the main jet as a ' high
speed " jet, maybe a " boost "jet circuit .
And, of course, maybe you might consider " rolling in " the throttle, I tell
my racer-to-bee s to count to 2 or 3 coming out of corners applying more
throttle , remember there is a whole dang car trying to catch up to the
throttle opening, hardly anyone pays attention to that, adrenaline usually
makes them forget. except winning drivers, of course (g).
Smooth makes for boring driving.
Just some trivia, ken campbell, crutching quite often in Iowadahoe
More information about the VirtualVairs