Scott, personally I'd leave the primaries alone and tune the accellerator
pump (s) the general rule is the plastic cams determine how much and the
shooters determine how long for, so for a heavy car you may need to use
smaller shooters to make the pump shot last longer, and possibly go up on
the cam(s) for more volume. The 440 I race is in a light car (1500 lbs) so I
use big shooters to shorten the pump shot as the car gets up on the mains so
quick, obviously a heavier car usually takes a little longer, hence the need
for a longer "shot". Hope this makes sense (Barry Grant I ain't!!!) Paul.
----- Original Message -----
From: "Scott Cowle" <scowle@mentorcollege.edu>
To: <land-speed@autox.team.net>
Sent: Wednesday, September 19, 2001 6:42 PM
Subject: carb adjuistments
> I put a holley 870cfm on my 440 and I love it but I'm having trouble
> getting the accelerator cam selection right. The engine seems to need a
> healthy shot to prevent off the line stumble, but once I'm rolling that
same
> amount of shot appears to be too much and causes a rich stumble.Should I
> richen up the primaries so I can use a smaller accelerator cam? This is
the
> first time I've used a Holley so this is new territory for me, I bought
the
> carb for my next trip to Maxton to help increase my top end mile per hour
by
> increasing the engines breathing capabilities.
> Help!!!! Scott
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