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01-22-2020, 10:39 AM | #21 |
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Re: Question on loosing fuel pressure going down track.
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01-22-2020, 11:37 AM | #22 |
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Re: Question on loosing fuel pressure going down track.
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Ed Wright 4156 SS/JA |
01-22-2020, 04:34 PM | #23 |
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Re: Question on loosing fuel pressure going down track.
Have you checked the pressure before the regulator? Most pumps put out about 15 PSI.
You may have a low pressure pump not designed to use with a regulator or the pump is no good. Jim Mantle V/SA 6632 |
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01-22-2020, 07:02 PM | #24 |
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Re: Question on loosing fuel pressure going down track.
Trust the sensor, there isn't a problem. Its 11:1 in high gear. My cars AFR gets leaner as RPM increases an gets richer at each shift. (completely different carb)
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Dave Noll, E/FS ,L/SA 6526 |
01-22-2020, 07:20 PM | #25 |
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Re: Question on loosing fuel pressure going down track.
Jeff did you get a chance to check the volume in a fuel jug for 60 seconds at the front of the car and what volume did you get?
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01-22-2020, 07:45 PM | #26 |
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Re: Question on loosing fuel pressure going down track.
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01-22-2020, 08:12 PM | #27 |
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Re: Question on loosing fuel pressure going down track.
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01-22-2020, 08:14 PM | #28 |
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Re: Question on loosing fuel pressure going down track.
Should pump a gallon in 30 seconds. I think you just found your problem.
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01-22-2020, 08:25 PM | #29 |
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Re: Question on loosing fuel pressure going down track.
Its weird that the O2 sensor goes rich , sounds like some work needs to be done to straighten out the fueling of the carb . That being said the carb is using more fuel than can be supplied to it , so the pressure drops . My recommendation is to figure out what's up with the carburetor , but also make sure your fuel system is up to the task . My Q-jet is fed from a BG400 pump through a dash 10 line , and stays right at 6.5 psi throughout the run . Dyno pulls show the A/F ratio varies from 12.8 at 5000rpm to 12.4 at 7400 rpm .
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01-22-2020, 09:25 PM | #30 | |
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Re: Question on loosing fuel pressure going down track.
Quote:
BTW, I was just giving Jeff a hard time. Sorry some of you missed this whole sordid tale, for 5 years ...Check out the build section once in a while ;-)
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