fuel system ????

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fuel system ????

Post  capri-sun on May 14th 2015, 9:18 pm

checking on what others are using,, 598 cu. in . tunnel ram 2 1250 dommy quick fuel carbs

using -an lines ,,, -12 line tank to pump,, -10pump to regulator,, and -8 to carb or carbs

is this the right direction ???

whats your thoughts

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Re: fuel system ????

Post  bruno on May 14th 2015, 9:32 pm

tank location? front or rear ?
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Re: fuel system ????

Post  capri-sun on May 14th 2015, 9:38 pm

rear on this exact one,, but later on it will be a front mount
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Re: fuel system ????

Post  FalconEh on May 14th 2015, 10:39 pm

Bypass/return line?
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Re: fuel system ????

Post  gmsmkr on May 15th 2015, 10:57 am

I don't have near the combo you have but my fuel system is up to it I think

-10 tank to pump -10 pump to reg -8 reg back to tank and -8 from reg to carb I'm using a A1000 pump
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Re: fuel system ????

Post  FalconEh on May 15th 2015, 8:52 pm

capri-sun wrote:checking on what others are using,, 598 cu. in . tunnel ram 2 1250 dommy quick fuel carbs

using -an lines ,,, -12 line tank to pump,, -10pump to regulator,, and  -8 to carb or carbs

is this the right direction ???

whats your thoughts


I am not running this much engine either (less inches w/ juice), but there are a few things I like to incorporate into the fuel system...Yes, IMO you are in the right direction. Even with 1-carb I prefer to have a bypass after the the carbs, which is the return line. In the example of a regulator before the carb feed lines, w/o a bypass the fuel pressure could reach levels the carb can't handle unloading the needle/seats. With the bypass behind the carb feeds regardless of the regulated pressure going to the carbs, the bypass is also regulated, fuel dead heads against the regulator until it reaches the preset level at which point it opens and sends the extra fuel back to the cell, thus you can set the bypass to open at a level (EG 6.5psi) that will feed the carb without a regulator in front(if it can handle the extra volume), although I do run a regulator in front of course . Some like fuel logs for this, and additionally too small of a vent can be a restriction -8 min. also basic but deserving of mention is solid tubing flows better than braided hose.
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Re: fuel system ????

Post  capri-sun on May 15th 2015, 9:22 pm

no by-pass,,,,, my combo is a 472, blue thunder heads,, tfs mafia intake,,. an-12 tank to pump ,, an-10 pump to regulatoe ,, 2 an-8 to carb,, the other combo is for a top sportsman set up
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Re: fuel system ????

Post  cool40 on May 15th 2015, 11:50 pm

You have plenty of fuel line but what pump you have in mind?
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Re: fuel system ????

Post  capri-sun on May 16th 2015, 10:03 pm

bg 400 or aeromotive similar
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Re: fuel system ????

Post  cool40 on May 16th 2015, 11:23 pm

capri-sun wrote:bg 400 or aeromotive similar
that'll work. Cool
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Re: fuel system ????

Post  rck532 on May 17th 2015, 11:24 am

This is my combo

604 with tunnel ram and duel 1250s

B/g 400 fuel pump it turns 7800 to 8000 rpms

Tank is in back

-12 tank to pump -10 pump to reg 4 -6 lines reg to carbs

Question is are the -6 lines big enough

thanks
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Re: fuel system ????

Post  DILLIGASDAVE on May 18th 2015, 5:26 am

A MagnaFuel/ProStar 500 pump is big enough to feed two dommies + 2 to 3 nitrous stages. Plus save some money on all the extra fuel line & mount the tank in the front.
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Re: fuel system ????

Post  richter69 on May 18th 2015, 10:49 pm

Pretty much my setup but i run a single carb and two foggers... Magnafuel prostar 500 pump
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Re: fuel system ????

Post  maverick on May 19th 2015, 5:50 pm

DILLIGASDAVE wrote:A MagnaFuel/ProStar 500 pump is big enough to feed two dommies + 2 to 3 nitrous stages. Plus save some money on all the extra fuel line & mount the tank in the front.

^^^^^^^^^^^^^^^^^^^^What he said.^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Re: fuel system ????

Post  FalconEh on May 19th 2015, 8:28 pm

Yes, -6 AN should be big enough. Stepping down from the -10 plus the slight regulator restriction, and the smaller -6 line should keep a constant solid flow of fuel from the regulator to the carbs (if it is not enough for the application performance will notably suffer). Disregard my bypass comments above when using an external bypass like on the Magnafuel/BG400 as the external goes directly back to the cell.
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