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  #16 (permalink)  
Old 06-11-2012, 10:15 PM
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Quote:
Originally Posted by hobby28
I called Sean Murphy with SMI carbs today and the first thing he asked was how much fuel pressure I have. I told him 8lbs and he told me to drop it to 5lbs and the problem would go away, and I was flooding the engine out by blowing by the needle and seat. It makes sense so I will install a regulator and see what happens, I am also going to try and keep some heat off the carb. Thanks for all the input.
I agree you don't need 8 psi, but if it's flooding because of excessive fuel pressure, why is it not doing it during the shorter heats, and why is it smoothing out and running strong after it sputters initially? Point is, based on everything you've said here I think it's something heat related.

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  #17 (permalink)  
Old 06-12-2012, 01:53 AM
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I have a high presure Edelbrock mechanical fuel pump rated at 10 psi on my 347 The holley 650 max operating pressure is 6 psi so i installed an adjustable holley regulator and set the pressure to 5.5 psi and have not had any issues at all using the standard float height measurement I also installed a $10 fuel pressure gauge inline next to the carb so you can watch the pressure while adjusting the regulator. If you had a fuel pressure gauge you could see at a glance when you are at wide open throttle , maybe you could monitor that and see what is happening.

Goodluck.
Al.
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Old 10-29-2012, 02:23 AM
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I thought I would post a follow up to this old post. I installed a fuel pressure regulator and shut the fuel pressure down to 4.5lbs. The problem went away immediately, I raced the rest of the year and never had anymore trouble. Thanks for all the help guys.
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  #19 (permalink)  
Old 10-29-2012, 03:13 AM
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Good stuff. Its nice to have finally solved the problem.
Al.
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