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Old 01-06-2004, 04:39 PM
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Edelbrock Carb Trouble

I'm using a Edelbrock 1407 750cfm carb on a small block chevy and carb runs great. The only problem is under hard braking or cornering the engine will die. I've checked the float level and fuel pressure and these are correct. I could use any ideas or help on other things to check.

Thanks in advance Bob

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Old 01-06-2004, 05:09 PM
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I suspect that centrifugal force is upsetting the float and needle assembly and causing your problems. Holley lists special float sets for drag racing and circle track as well as float chamber baffles, ect. I've not seen the same listed for the E-carbs but you should contact there tech dept. for help as they have always been helpful when I've called.

ps. I'm also running the 1407 on my 350 in a 1974 Vette and am very happy with the carb. The car is a daily street driver and I haven't had your problem yet, but let me know what you come up with.

Last edited by Pony; 01-06-2004 at 05:14 PM.
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Old 01-06-2004, 05:10 PM
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hi, BigKat_83
check your brake booster for a vac leak
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Old 01-06-2004, 05:16 PM
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Check your idle mixture screws, they may be a little rich. Also like one off said, check your brake vacuum line that hooks up in the back on those carbs. If it is leaking you are loosing manifold vacuum and the carb wont draw the right amount of fuel.
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Old 01-06-2004, 07:12 PM
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The brakes are manual, but that was a good idea about the brake booster having a leak. The car is a Porsche with a chevy engine. I don't see any problems at all under acceleration.
It would be easy for me to turn the carb around and mount it with the front facing the rear of the engine. If this moved the problem to acceleration I would know where to start looking.

Bob
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Old 01-08-2004, 07:51 AM
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sounds interesting, what kind of Porsche is that 928,914,944,
have some pics? if your cornering that hard maybe it is your floats,
Pony had some info worth checking out on that. one more thought
if you rev it 3-4 times quickly does it want to die? if so check for vac leak,at manifold or under carb,or any other vac lines and stuff.
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Old 01-09-2004, 01:06 AM
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One Off
I added some photos in my gallery. That sure is a neat tool,wish more boards had this.

I suspect that my troubles are with the forces I can put on the carb. Might switch a friends Holley and see if its any better. I hate to do this because the car runs so good with the Edelbrock.
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Old 01-09-2004, 05:32 PM
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hey big,
that looks like a very nice job, how does it handle? have you thought about a few 44 idf webers? 2 would work.
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