fuel system design
Why not just go with a #8 feed with a #6 return?? That'll leave you room to grow a bit more when you want. That single 450 might be a little small depending on how much boost you wanna run. From what I've been told its better to over build your fuel system.
Teching In
Joined: Mar 2011
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X2 for -8 feed and -6 return. I'm doing the same thing in my car with dual 340s to be able to hopefully hit 1000 in the next few years and I may upgrade to -10 supply and use the -8 for return. Always better to over design than under design.
I bought the racetronix dual 340 kit for my 3rd gen. Ill be using 8 feed 6 return lines. One of the racetronix techs was telling me when buying a fuel filter for pumps like that you need at least a -10 fuel filter because anything smaller doesn't have the needed surface area(something along those lines anyway)
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Joined: Mar 2014
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From: Ohio
That might be one of the dumbest things I've heard in a long time...
Restricted User
Joined: Mar 2014
Posts: 7,192
Likes: 109
From: Ohio
I wonder what reasons you've got besides the dumbest thing I've heard in a long time?? That's what the guy said to me. Kinda just believed them seeing how they build high performance fuel systems and I don't
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TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
Because the guy associated inlet/outlet size with the filter area, which do not always relate. The SAME filter can have -6,-8,or -10 fittings. It's a matter of which fuel line you are running. Go by filter area, NOT fitting size. The comment was correct. It IS the dumbest thing that could be said.
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Verdad Gallardo Restricted User
Joined: Mar 2014
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From: Ohio
Thats diesel truck mentality lol. If you put a 12" wide stack in the bed of your truck then obviously your 3" exhaust is going to flow like a water main
Joined: Mar 2002
Posts: 2,032
Likes: 26
From: A Racetronix dealer near you...
I bought the racetronix dual 340 kit for my 3rd gen. Ill be using 8 feed 6 return lines. One of the racetronix techs was telling me when buying a fuel filter for pumps like that you need at least a -10 fuel filter because anything smaller doesn't have the needed surface area(something along those lines anyway)
A 10 micron filter between the pump and injectors is required to provide reasonable protection in a fuel injection system. A larger filter element (with more surface area) is required to prevent pressure drop through the filter at high flow volumes. As more debris plugs the filter element the pressure drop increases across / flow decreases through the element.
Based on testing with our SS/magnetic filter elements we recommend our #12 filter housing for applications that require 500LPH or more. Given the small price difference between the two filter sizes the #12 housing is the better choice when space is not an issue.
Different manufacturers may have different specs and recommendations based on the design of their elements. Not all filters with the same micron rating perform the same.
Our #10 housing and element combo is currently $56.06.
Our #12 housing and element combo is currently $60.80.
We offer two types of mounting brackets:
Extruded bracket
Billet mounting bracket
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Fuel Pump Feed Hi ALL, I too fit a -10 to -12 S/S 40 micron PRE-FILTER (LARGE CHAMBER) close to the pump. (element of 2" x 14")
The pump inlet requirement line diameter IS based on line flow (resistance) needed to STOP pump cavitation.
My OTHER REASON is the inertia of the fuel in the lines.
THINK : We leave the start line/turn with an often greater than a TWO Gravity increase in weight of the line fuel AWAY from the pump inlet.
THUS a "local" chamber that holds fuel, close to the pump, WILL reduce cavitation of the pump.
I have found a -4 return to the tank will work fine.
I have found the use of Annealed S/S tubing works fine @ $1.00 a foot.
I have found Versa Flair fittings work fine for fuel line use.
My "tech" is based on External Mounted pumps, with internal pump placement I use lift pumps with a "make-up" tank.
Lance
The pump inlet requirement line diameter IS based on line flow (resistance) needed to STOP pump cavitation.
My OTHER REASON is the inertia of the fuel in the lines.
THINK : We leave the start line/turn with an often greater than a TWO Gravity increase in weight of the line fuel AWAY from the pump inlet.
THUS a "local" chamber that holds fuel, close to the pump, WILL reduce cavitation of the pump.
I have found a -4 return to the tank will work fine.
I have found the use of Annealed S/S tubing works fine @ $1.00 a foot.
I have found Versa Flair fittings work fine for fuel line use.
My "tech" is based on External Mounted pumps, with internal pump placement I use lift pumps with a "make-up" tank.
Lance
Joined: Mar 2002
Posts: 2,032
Likes: 26
From: A Racetronix dealer near you...
Hi ALL, I too fit a -10 to -12 S/S 40 micron PRE-FILTER (LARGE CHAMBER) close to the pump. (element of 2" x 14")
The pump inlet requirement line diameter IS based on line flow (resistance) needed to STOP pump cavitation.
My OTHER REASON is the inertia of the fuel in the lines.
THINK : We leave the start line/turn with an often greater than a TWO Gravity increase in weight of the line fuel AWAY from the pump inlet.
THUS a "local" chamber that holds fuel, close to the pump, WILL reduce cavitation of the pump.
I have found a -4 return to the tank will work fine.
I have found the use of Annealed S/S tubing works fine @ $1.00 a foot.
I have found Versa Flair fittings work fine for fuel line use.
My "tech" is based on External Mounted pumps, with internal pump placement I use lift pumps with a "make-up" tank.
Lance
The pump inlet requirement line diameter IS based on line flow (resistance) needed to STOP pump cavitation.
My OTHER REASON is the inertia of the fuel in the lines.
THINK : We leave the start line/turn with an often greater than a TWO Gravity increase in weight of the line fuel AWAY from the pump inlet.
THUS a "local" chamber that holds fuel, close to the pump, WILL reduce cavitation of the pump.
I have found a -4 return to the tank will work fine.
I have found the use of Annealed S/S tubing works fine @ $1.00 a foot.
I have found Versa Flair fittings work fine for fuel line use.
My "tech" is based on External Mounted pumps, with internal pump placement I use lift pumps with a "make-up" tank.
Lance
Tnx.
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<