LS7 fuel setup question
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Launching!
Joined: Dec 2007
Posts: 255
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From: greenbrier tn
LS7 fuel setup question Well I have two different opinions. 1- Run from the external pump to the inlet side of the bypass regulator, then out of the supply side to the fuel rails. Then run a return line from the bypass side of the regulator, back to the tank.
2-then another company says run from the pump to the fuel rails, then thru them to a bypass regulator, and then back to the tank. I am not sure why I even need a return.The ZO6 LS7 motor from the factory uses a dead head style system. What would be wrong with just running a regulator close to the fuel rails, setting the PSI at 58 to 60 there an let that work.
2-then another company says run from the pump to the fuel rails, then thru them to a bypass regulator, and then back to the tank. I am not sure why I even need a return.The ZO6 LS7 motor from the factory uses a dead head style system. What would be wrong with just running a regulator close to the fuel rails, setting the PSI at 58 to 60 there an let that work.
Deadhead style is fine & will have less underhood line clutter, since you are likely concerned with looks as well.
Flow-thru rails tend to heat the fuel in the tank more. Considering your street rod application will not have excessive underhood temps, any vapor lock will not be an issue.
If the engine was excessively modified, a flow-thru system will ensure that the regulator controls the lowest pressure that the rail sees, instead of the pressure entering the rail. The stock rails are capable of feeding the engine in mild to moderately modified form, so you should be fine.
Flow-thru rails tend to heat the fuel in the tank more. Considering your street rod application will not have excessive underhood temps, any vapor lock will not be an issue.
If the engine was excessively modified, a flow-thru system will ensure that the regulator controls the lowest pressure that the rail sees, instead of the pressure entering the rail. The stock rails are capable of feeding the engine in mild to moderately modified form, so you should be fine.
