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Re: 3/8" return line, how much will it support ?
[Re: AlexP]
#34027
01/17/07 01:11 PM
01/17/07 01:11 PM
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Joined: Jan 2003
Posts: 961
Carson City, Nevada
RobbMc
super stock
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super stock
Joined: Jan 2003
Posts: 961
Carson City, Nevada
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Quote:
I want the basic system minus the pump to be 600hp capable. It just ticks me off because I would really like to be able to use the new 3/8" I already bought, but I think I am just going to have to bite the bullet and get a 1/2" return line done now.
I am going to get it all in SS from Inline tube, and Dante is going to get back to me tomorrow to see if Inline will discount the custom items. If so, 15% off of a $280 order is nothing to sneeze at.
Rob, with the fuel pump I will be using and the other dimensionally similar Walbro pumps available, in your personal opinion do you think that I should use the 3/8" or 1/2" return line for this specific instance ?
Well, if I understand you correctly, you are going to use a single Walbro pump that produces only 45 gph freeflow. Is that correct? I don't think 45 gph is gonna do it for a 600hp application. I'd like to see at least 100 gph, even with a return regulator.
But, to answer your question directly, if you were to run a 45 gph pump, a 5/6" return line would work (assuming no more than 10 feet of line and no sharp bends).
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Re: 3/8" return line, how much will it support ?
[Re: Quicktree]
#34028
01/17/07 01:31 PM
01/17/07 01:31 PM
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Joined: Apr 2003
Posts: 2,708
jax. fla.
70Dustmite440
master
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master
Joined: Apr 2003
Posts: 2,708
jax. fla.
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Quote:
True return style regulators are back pressure sensitive and will not work correctly if there is any measurable backpressure on the return
never understood before but...
im starting to understand......... 
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Re: 3/8" return line, how much will it support ?
[Re: 70Dustmite440]
#34029
01/17/07 03:02 PM
01/17/07 03:02 PM
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Joined: Jun 2006
Posts: 254
Vista, CA
71Chip
enthusiast
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enthusiast
Joined: Jun 2006
Posts: 254
Vista, CA
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So I need a little help here...
About 6 months ago in excitement I ordered the parts for my fuel system. I bought a mallory 140 pump that is rated at 12 psi. The kit says use 3/8" or larger line, but it is plumbed for a 3/8" line. Is there any point to using a larger line then? I'm guessing maybe I can get a 1/2" fitting?
I'm a college student and on a budget and it would suck to have to buy all new 1/2" line let alone a new pump. I don't think I can still return this one.
I am anticipating 550hp.
71 Challenger
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