Been a while since I posted on Holley Carbs and decided to post today about the need for a Secondary Throttle Shaft/ Throttle Blade Adjustment capability.
In the old days we would remove the stock Slotted Head Screw (slot on the bottom surface of the baseplate) and flip the screw over so now the Slotted Head Screw was pointed upward.
You usually had to pean the thread slightly to make the screw stay in one spot on the adjustment.
You could also use a stainless Allen Hex Head screw slightly longer and forget about the very small flat blade screwdriver required with the stock stuff.
Today that is a whole different deal.
Now on EBAY you can buy am adjustable secondary pump cam mounting part that has the adjustment screw built into the assy. I have included a Picture below.
The POINT OF THIS POST is to tell people get the Primary Blade to Transfer Slot adjusted and then never touch the Primary adjustment screw from that point if you need to change the idle rpm of the engine. USE THE ADJUSTABLE SECONDARY SCREW TO SET THE IDLE.
Tom V.
ps Holley wants $50 for their part, RPM/QFT wants around $15.00
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
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