Fuel pump w/ vent return
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Fuel pump w/ vent return
The stock mech fuel pump w/ a vent return line only pumps 30 gph. I am concerned this will not be enough for a 383 stroker at 400 plus HP. Is there a higher output pump w/ a vent return line? Thanks for the help guys.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,754
From: Charlotte NC
Because how likely are you going to be driving an extended period of distance with your foot planted to the floor.DUB
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Fuel pump
I was not able to get the output on the 70 LT-1 pump. If that was only 30 GPH I agree with you. Thanks for your input.
Thread Starter
Racer
Joined: Jul 2013
Posts: 366
Likes: 19
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 787
From: Lebanon Township New Jersey
I don't have the original pump but I have a stock replacement pump, with the return lined hooked up. The only real change to fuel supply I've made is eliminating the small filter in the carb and installing a filter between the pump and the carb. (I also replaced the sock in the tank.) I drag race the car regularly and I have gone as quick as 12.15 at 110 with this setup.
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Pro
Joined: Aug 2000
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From: Vancouver B.C.
To add a comment, I recently installed a brand new Carter M6955 factory style replacement fuel pump (has return line), their so called Muscle Series. I am now having carb idle issues with a QJet. Checked pump pressure - 9 lbs. Way too high. My online research indicates that this is a common problem with replacement pumps - too much pressure. Should be 5-6. Im picking up a regulator this week to see if it fixes the problem.
Last edited by Dino_'72; Sep 1, 2021 at 11:46 AM.
Administrator
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From: About 1100 miles from where I call home.
To add a comment, I recently installed a brand new Carter M6955 factory style replacement fuel pump (has return line), their so called Muscle Series. I am now having carb idle issues with a QJet. Checked pump pressure - 9 lbs. Way too high. My online research indicates that this is a common problem with replacement pumps - too much pressure. Should be 5-6. Im picking up a regulator this week to see if it fixes the problem.