Return style fuel system
Thread Starter
Teching In
Joined: Jul 2022
Posts: 13
Likes: 2
From: Florida
Return style fuel system My vehicle is a 1992 volvo 240 which already has a discrete fuel line for returning fuel to the tank. For a mild LS1 rebuild, does a return style fuel system offer any advantages at near-stock power levels? The car can be set up easily for either fuel system, but I have had experience with returnless systems boiling fuel. Another thing I have thought about is the wiring; I would assume a return style system would be easier to set up since the fuel pump would run at a constant speed? Whereas a true returnless system would have a controller varying the speed of thte fuel pump to match the desired pressure? Any experience or insight would be greatly appreciated.
Teching In
Joined: Jul 2022
Posts: 26
Likes: 9
I'm running 520hp with a LS3 and a return-less system and no issues. Just AN6 hose from the "Corvette" filter/regulator to Radium fuel rails; and from the filter/regulator AN6 to the tank for feed and return.
At some HP level I am sure a return style system is needed but until you get to that point the return-less is much better on the street as you are not continually circulating fuel to the engine bay introducing heat into the fuel.
Most high performance cars have gone to return-less style systems now for this reason.
At some HP level I am sure a return style system is needed but until you get to that point the return-less is much better on the street as you are not continually circulating fuel to the engine bay introducing heat into the fuel.
Most high performance cars have gone to return-less style systems now for this reason.
I'm running 520hp with a LS3 and a return-less system and no issues. Just AN6 hose from the "Corvette" filter/regulator to Radium fuel rails; and from the filter/regulator AN6 to the tank for feed and return.
At some HP level I am sure a return style system is needed but until you get to that point the return-less is much better on the street as you are not continually circulating fuel to the engine bay introducing heat into the fuel.
Most high performance cars have gone to return-less style systems now for this reason.
At some HP level I am sure a return style system is needed but until you get to that point the return-less is much better on the street as you are not continually circulating fuel to the engine bay introducing heat into the fuel.
Most high performance cars have gone to return-less style systems now for this reason.
Andrew
Try it and let us know how it works!
Andrew
Teching In
Joined: Dec 2005
Posts: 4
Likes: 0
is the 58psi from these filter/regulators gonna be a problem with a Terminator X MAX system? the Holley documentation demands 60psi (in big bold letters).
I know its a popular option, just doting my I's and crossing my T's.
Just a stock LS1. Ricks tank with Walbro 255 pump.
Rubes
P.S. Hi Andrew
I know its a popular option, just doting my I's and crossing my T's.
Just a stock LS1. Ricks tank with Walbro 255 pump.
Rubes
P.S. Hi Andrew
is the 58psi from these filter/regulators gonna be a problem with a Terminator X MAX system? the Holley documentation demands 60psi (in big bold letters).
I know its a popular option, just doting my I's and crossing my T's.
Just a stock LS1. Ricks tank with Walbro 255 pump.
Rubes
P.S. Hi Andrew
I know its a popular option, just doting my I's and crossing my T's.
Just a stock LS1. Ricks tank with Walbro 255 pump.
Rubes
P.S. Hi Andrew
Andrew
Trending Topics
TECH Regular
Joined: Dec 2011
Posts: 420
Likes: 115
is the 58psi from these filter/regulators gonna be a problem with a Terminator X MAX system? the Holley documentation demands 60psi (in big bold letters).
I know its a popular option, just doting my I's and crossing my T's.
Just a stock LS1. Ricks tank with Walbro 255 pump.
Rubes
P.S. Hi Andrew
I know its a popular option, just doting my I's and crossing my T's.
Just a stock LS1. Ricks tank with Walbro 255 pump.
Rubes
P.S. Hi Andrew
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TECH Enthusiast
Joined: Jul 2019
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i used the corvette filter/reg in my volvo swap (1998 v90). in my case the factory setup was a high pressure pump in the tank and then a filter about midway up the vehicle. all i did was take the filter out and mount the corvette filter/reg in its place. i dont really like the setup though, i've had nothing but trouble getting the regulator not to leak. other people havent had the same experience so your mileage may vary.
if i had to do it all over again, i'd pull the return style fuel rails off an early truck (i think 99 to 03 had the return style system). from what i understand it flows enough to support 700 whp on 85 which is quite a bit. probably more of a hassle to run the lines but i would like to get rid of that corvette regulator.
if i had to do it all over again, i'd pull the return style fuel rails off an early truck (i think 99 to 03 had the return style system). from what i understand it flows enough to support 700 whp on 85 which is quite a bit. probably more of a hassle to run the lines but i would like to get rid of that corvette regulator.