07-07-2014, 06:16 PM
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CC Member
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Join Date: May 2006
Location: Manchester,
MO
Cobra Make, Engine: Hurricane - FE
Posts: 627
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Not Ranked
Idle Screw reaction
enjoying the tuning process  of my webers. I am finding my idle mix screws have little to no effect on the idle speed or smoothness.
I've checked the throttle blades to make sure the progression holes are covered and everything looks good. At idle, the idle speed screw is "in" not quite 1/2 turn. If the car is running off sucking air past the progression ports, I don't think I can get the blades to fit any tighter.
On a Holley, I'd be getting suggestions to crack open the secondaries or drill the throttle plates to move a little more air into the engine. But this isn't a Holley. I hesitate to drill the plates just yet.
Car will idle relatively smooth at 850-900. Mixture is a little rich but I get stumble around 2500 rpm as the car transitions. I can baby it and I don't get any stumble. If I romp on it, the squirters do their thing and everything is fine. If I try to accelerate with medium peddle, it's like riding a bucking horse
Ideas?
Paul |
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