In a message dated 10/7/2006 9:57:20 P.M. Mountain Daylight Time,
lsr_man@yahoo.com writes:
Does anybody still run a carburetor?
I'm running a big block Chevy with an Accel ACC-9107 HEI distributor, Holley
4150 HP Pro-Series 1000 CFM on an Edelbrock Torker single plane intake, and
a Comp roller cam. I have the distributor vacuum line connected to the
vacuum fitting located at the back of the intake manifold under the carburetor
base in the intake plenum. The motor pulls well through lower gears, but
falls
flat in high gear and tends to pop back through the carburetor.
I've been told that I should not run the vacuum from the manifold. One or
two people told me not to connect the vacuum at all. Should I connect the
distributor vacuum somewhere on the carburetor?
This is strictly an LSR motor and not used on the street.
thanks
dickj
Hi Dickj
I do, I do!!!
You do have it incorrectly connected as it should run off a ported orifice
above the throttle blades and not full manifold vacuum.
Screw the vacuum advance anyway! For competition engines, I don't use any
advance, mechanical or vacuum. This eliminates any inconsistency in total
timing as advance devices are "sloppy".
I set the timing to 38 static for Bonnevilles high altitude and I'm good to
go..
I spin the engine over first for a few seconds and then hit the ignition.
This overcomes the problem of a lot of ignition advance when cranking it. It
also pre lubes it before you light the fire.
Otto
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