Carb help

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Carb help

Post  capncruncher1965 on March 20th 2016, 3:47 pm

Hey guys i have a 750 quick fuel carb and it works great thinking i needed a bigger carb i put a quick fuel 950 base plate on it try to make it a 830 cum now it runs about 20 seconds and cuts off maybe I put the wrong gasket on it any ideas
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Re: Carb help

Post  supervel45 on March 20th 2016, 4:58 pm

Have any fuel pressure?

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Re: Carb help

Post  rmcomprandy on March 20th 2016, 5:01 pm

capncruncher1965 wrote:Hey guys i have a 750 quick fuel carb and it works  great thinking i needed a bigger carb i put a quick fuel 950 base plate on it try to make  it a 830 cum now it runs about  20 seconds and cuts off maybe I put the wrong gasket  on it any ideas

The idle circuit drillings are is different places; either gasket would be the wrong gasket for one or the other.

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Got fuel pressure

Post  capncruncher1965 on March 20th 2016, 5:32 pm

Got fuel pressure it runs great and will idle for about 20 seconds then act's  like it runs out of FUEL
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Re: Carb help

Post  supervel45 on March 20th 2016, 5:36 pm

capncruncher1965 wrote:Hey guys i have a 750 quick fuel carb and it works  great thinking i needed a bigger carb i put a quick fuel 950 base plate on it try to make  it a 830 cum now it runs about  20 seconds and cuts off maybe I put the wrong gasket  on it any ideas
Sorry about that mis-read your post, I thought you where having problems with the 750 and wanted to put a 950 base plate, not that you already had. Never done that swap sorry can't help you there but I know the Holley Competition 6109 and 8156 750's I believe use different base plates then 4779 750's so it may be the same deal and have something to do with the 4 corner idle circuits.

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Gasket

Post  capncruncher1965 on March 20th 2016, 5:48 pm

I was afraid there would be something different like that thanks for the help guys
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Re: Carb help

Post  supervel45 on March 20th 2016, 5:50 pm

I would open the idle screws 3 or more turns and see if it helps.

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Re: Carb help

Post  supervel45 on March 20th 2016, 6:02 pm

http://www.allcarbs.com/ Call Jim at this place, I suspect he can help you.

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I'll give jim a call

Post  capncruncher1965 on March 20th 2016, 6:48 pm

I'll call Jim and try 3 turns on the screws thanks guys
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