Holley transfer slot adjustment
08-13-2007, 11:26 PM
#1
Holley transfer slot adjustment
How do I go about getting the transfer slot exposed were it needs to be. When I first got my car running I just turned the idle screw to were it would idle best. Is there only one idle adjustment screw? I have a holley 650 DP, mods below. How do I measure the distance for this "transfer slot" and how do I adjust it.
Thanks.
Thanks.
08-13-2007, 11:45 PM
#2
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
There is only one idle speed adjustment accessible with the carb installed. The best way to go about it is to take the carb off, turn it upside down, and eyeball the amount the slot is exposed with the throttle completely closed. You want the "slot" to appear as a square as exposed by the throttle blades with the throttle arm against the idle speed screw (if you have a choke, make sure it is completely released while you are doing all of this).
There is a stop screw on the secondaries, a small slotted screw you access from the bottom of the throttle plate. Do the same thing for the secondary slots.
Put the carb back on, get it warmed up, and see if you can get a smooth idle with the idle mixture screws, and at the proper RPMs. If you need to adjust the idle RPMs, take the carb off and adjust the secondaries. It's a pain, but it's what gives the best results.
There is a stop screw on the secondaries, a small slotted screw you access from the bottom of the throttle plate. Do the same thing for the secondary slots.
Put the carb back on, get it warmed up, and see if you can get a smooth idle with the idle mixture screws, and at the proper RPMs. If you need to adjust the idle RPMs, take the carb off and adjust the secondaries. It's a pain, but it's what gives the best results.
08-15-2007, 10:34 AM
#3
Re: Holley transfer slot adjustment
There is only one idle speed adjustment accessible with the carb installed. The best way to go about it is to take the carb off, turn it upside down, and eyeball the amount the slot is exposed with the throttle completely closed. You want the "slot" to appear as a square as exposed by the throttle blades with the throttle arm against the idle speed screw (if you have a choke, make sure it is completely released while you are doing all of this).
There is a stop screw on the secondaries, a small slotted screw you access from the bottom of the throttle plate. Do the same thing for the secondary slots.
Put the carb back on, get it warmed up, and see if you can get a smooth idle with the idle mixture screws, and at the proper RPMs. If you need to adjust the idle RPMs, take the carb off and adjust the secondaries. It's a pain, but it's what gives the best results.
There is a stop screw on the secondaries, a small slotted screw you access from the bottom of the throttle plate. Do the same thing for the secondary slots.
Put the carb back on, get it warmed up, and see if you can get a smooth idle with the idle mixture screws, and at the proper RPMs. If you need to adjust the idle RPMs, take the carb off and adjust the secondaries. It's a pain, but it's what gives the best results.
08-15-2007, 11:04 AM
#4
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
It's on the bottom of the throttle plate, on the passenger side. It's in a threaded hole. You need a small flat-tip screwdriver to adjust it.
08-15-2007, 02:45 PM
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08-15-2007, 04:39 PM
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Car: 1985 Z28
Engine: 355 topped with Dart heads
Transmission: 700R4
Axle/Gears: Stock axle with 3.73's
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