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 Too much pressure or volume 
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
What's worse for heating fuel too much pressure or volume? Too much volume as in deadhead or too small a return. I've herd people say a deadhead heats fuel but some say too much return/circulating does as well.

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Thu Apr 21, 2016 3:02 am
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Joined: Fri Feb 08, 2013 5:50 pm
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Obviously you don't want to heat the fuel, but too much pressure causes foaming/aeration of the fuel. And you can't meter aerated fuel consistently.


Thu Apr 21, 2016 5:54 pm
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Joined: Sun May 12, 2013 5:21 am
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Location: Michigan
Yah we all know cold fuel is good. But if you go from a low gph pump to a high gph pump with the same pressure no other changes and then have heated fuel problems obviously too much volume does the same.

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Thu Apr 21, 2016 9:37 pm
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Joined: Sun May 12, 2013 5:21 am
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Location: Michigan
Low psi hi-vol pump is still heating fuel somewhat. I moved the reg so other factors have been changed, I just know the reg is still hotter than I'd like.

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Sat May 07, 2016 2:35 pm
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Joined: Thu May 08, 2014 7:47 pm
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how are you feeding the pump? if the pump does not have good supply, or is set up wrong, it will over heat and blow bubbles.


Mon May 16, 2016 8:35 pm
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Joined: Sun May 12, 2013 5:21 am
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Location: Michigan
3/8 factory line from the tank with good venting

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Thu May 19, 2016 7:58 pm
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Joined: Thu May 08, 2014 7:47 pm
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well I know from experience the self regulated pumps are bad about heating up fuel. The way I resolve this is with a bleed type system of sorts. to bypass a little fuel back to the tank to help releave some of the head pressure and heat that can develop with a set up like this, with a piss line and restriction. I use a -4 line and nitrous jets.


Thu Aug 11, 2016 12:47 am
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
I used a bypass reg from the start with the new pump to try and do that, I set the reg to just bypass some at idle. later I checked the temp of the pump and saw it was about 80degs hotter than the engine block at full heatsoak. Even switch to a lower psi pump and same issue, thx to another members feedback I know it may be just that brand of pumps I used.

viewtopic.php?f=25&t=1189

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Fri Aug 12, 2016 7:05 am
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Joined: Sat Jun 01, 2013 8:02 pm
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What kind of pump are you using and how is the line plumbed from the sump etc

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Fri Aug 12, 2016 1:15 pm
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Joined: Sun May 12, 2013 5:21 am
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Location: Michigan
Carter pumps and factory line & tank, well vented.

I planned to redo the fuel system before I tried an electric pump, but I may try a Holley 1st next year depending on my time & resources vs curiosity.

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Sat Aug 13, 2016 8:06 am
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