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Old 01-25-2012, 12:16 PM
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holley troubles help please

I have a Holley spread bore 6210 mechanical secondary 650cfm. Its stock. Has 62 main jets 82 rear. Have 6.5 power valve. THE PROBLEM...at around 2200 to 2400rpm it bucks..or stumbles momentaraly and disapears. I am nicley driving along at a steady speed and the car gives a sudden "HIC" and it goes away. Does NOT happen under any accilaration, only when holding the gas level at 2200 to 2400. When I look down into the carb at that rpm,..the gas flow is steady, yet it still hics and stumbles.??? I have cleaned the carb 3 times now...tried jets from 60 to 64...tried power valves from 8.5 to 6.5 Nothing seems to make a difference. I put the old Q-jet back on and it doesnt stumble. Is 2200 rpm a transfer point ??? Kinda lost here.

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Old 01-25-2012, 12:36 PM
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Quote:
Originally Posted by oldhotroddertr7
I have a Holley spread bore 6210 mechanical secondary 650cfm. Its stock. Has 62 main jets 82 rear. Have 6.5 power valve. THE PROBLEM...at around 2200 to 2400rpm it bucks..or stumbles momentaraly and disapears. I am nicley driving along at a steady speed and the car gives a sudden "HIC" and it goes away. Does NOT happen under any accilaration, only when holding the gas level at 2200 to 2400. When I look down into the carb at that rpm,..the gas flow is steady, yet it still hics and stumbles.??? I have cleaned the carb 3 times now...tried jets from 60 to 64...tried power valves from 8.5 to 6.5 Nothing seems to make a difference. I put the old Q-jet back on and it doesnt stumble. Is 2200 rpm a transfer point ??? Kinda lost here.
Have you checked the float level
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Old 01-25-2012, 09:56 PM
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solved

I got the carb used, and it had a rebuilders kit put in. I pulled the carb completley apart to check everything. He had installed the "base to throttle plate" gasket up-side down. It left a " air-port" wide open. Flipped the new gasket, and now it works great. Attention to detail when rebuiling anything.
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Old 01-25-2012, 10:09 PM
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Quote:
Originally Posted by oldhotroddertr7
I got the carb used, and it had a rebuilders kit put in. I pulled the carb completley apart to check everything. He had installed the "base to throttle plate" gasket up-side down. It left a " air-port" wide open. Flipped the new gasket, and now it works great. Attention to detail when rebuiling anything.
Thanks for posting the resolution! "He" needs a swift kick, wouldn't you say?
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Old 01-26-2012, 06:36 AM
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swift kick

Quote:
Originally Posted by cobalt327
Thanks for posting the resolution! "He" needs a swift kick, wouldn't you say?
LOL, good post. But you know, I made the same mistake way back when,...so I'd have to boot my own pants too
I was in a hurry putting a 327 together last year "wasnt paying attention" and had a bunch of friends in the shop telling stories and joking around, ..well I made a boo boo, .. I put the bottom rear main seal in backwards. LOTS of oil squirting out several hours later..aaarrrgg. "out came the motor" So,..it can happen honestly, thats why I like rebuiling alone,..phone OFF and no distractions.....now where was I ????
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