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Unread 05-05-2002, 12:01 PM   #1
Jami
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304 Carb Reccomendations

What kind of carb, and what size do you think would be best on a 304? Any suggestions would be great. Thanks Jami

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Unread 05-05-2002, 08:21 PM   #2
scottahicks
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I run a holley 650 double pumper on an edelbrock AMC performer manifold, I had to play with the jetting a bit,, but the throttle response is simply outstanding
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Unread 05-05-2002, 11:35 PM   #3
jeepdaddy2000
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Carb size depends on application,low speed work needs a smaller carb. High speed(RPM) motors need larger carbs.A good formula to determine this is
CarbCFM=EngineCID X MaxRPM 304 X 45000(RPM)
------------------or--------------=400CFM
3456 3456
You must be honest with your estimate of max RPM.
Personally,I prefer large 2 BBL carbs or smaller 4 BBL's with vacuum secondaries. Try to stay away from carbs with diaphram power valves as these have a way of rupturing if the engine backfires.For a mild 4 BBL upgrade a Carter AFB(Edlebrock proformer) in the 400 to 500 CFM range would be a good choice.Be sure that the intake matches the carb/cam and is the aplication you want.Otherwise any larger 2BBL(rochester 2VC/2VE/2VG exct...any 2BBL from early model GM V8)is a good choice.
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Unread 05-05-2002, 11:41 PM   #4
jeepdaddy2000
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CarbCFM= EngineCID x MaxRPM divided by 3456. Sorry the formula didn't post right.
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Unread 05-06-2002, 07:12 AM   #5
Jami
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Thanks for the help guys, I will look into this.

Jami
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