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Author Topic:   carbs
elcamino
Member
posted November 02, 2000 07:21 PM
what causes primary boosters to dribble fuel into intake at 1500 to 2500 rpm's


Earl Parker II
Member
posted November 03, 2000 06:00 PM
At those rpms the air flow rate is probably high enough to just initiate the flow of the air/fuel emulsion from the boosters. If it's doing this at idle you probably need to close the primary butterflies down somewhat and open the secondaries some more to compensate. Make sure your float level is at the bottom of the sight plug hole- higher than normal fuel level in the bowl will aggravate this problem. Also make sure that your fuel pressure isn't higher than 6 psi at idle. High fuel pressure can be another complicating factor. Finally, make sure the main air restrictions aren't blocked. Let us know if you can't cure the problem and we'll dig a little deeper.


elcamino
Member
posted November 03, 2000 08:04 PM
thanks for the reply. the carbs are center squirter's on a tunnel ram intake with a 406 chevy engine.i have checked float level's and sprayed air bleeds with carb cleaner.carbs were rebuilt 3 mo. ago.they do'nt dribble at idle.both carbs dribble at same rpm's 1500-2500.it's a 2x4 setup.any suggestions welcome.


elcamino
Member
posted November 03, 2000 08:05 PM
thanks for the reply. the carbs are center squirter's on a tunnel ram intake with a 406 chevy engine.i have checked float level's and sprayed air bleeds with carb cleaner.carbs were rebuilt 3 mo. ago.they do'nt dribble at idle.both carbs dribble at same rpm's 1500-2500.it's a 2x4 setup.any suggestions welcome.


elcamino
Member
posted November 03, 2000 08:10 PM
i forgot fuel pressure is 6psi.


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