Idle Transfer Slots??
Thread Starter
Joined: Oct 2000
Posts: 2,112
Likes: 0
From: Orange County,NY
Car: 1982 Z28
Engine: 355
Transmission: T56
Axle/Gears: 12 Bolt
Idle Transfer Slots??
On my Speed Demon 750DP should I have the idle transfer slots exposed on all four barrels of the carb or just the primaries? It is mainly street/strip with a 4 speed.I have just the primaries exposed right now with the secondaries completely closed.Seems to be good but I was wondering if it would run better with all of them exposed.I have heard (read) to expose all four of them only on full race cars,not on street,true or false?Thankx
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1982 Z28:355,4 Speed,Lots of bolt ons
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1982 Z28:355,4 Speed,Lots of bolt ons
Supreme Member
Joined: Sep 2001
Posts: 6,111
Likes: 53
From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
By rights they all should just expose the edge of the idle transfer slot. say .02 to .035". if you have a small camshaft,
close to stock (high manifold vacuum).
and the motor idles too fast when set like this you may have to close the secondary butterflies a little. These carbs were designed to work on your average hi perf setup with some what less vacuum signal
than a stock motor.
close to stock (high manifold vacuum).
and the motor idles too fast when set like this you may have to close the secondary butterflies a little. These carbs were designed to work on your average hi perf setup with some what less vacuum signal
than a stock motor.
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