Question on loosing fuel pressure going down track.

Jeff Stout · 01-20-2020, 06:13 PM

With a quality gauge mounted in front of me on windshield I can watch fuel pressure going down track. What is happening is the pressure is going from 6 lbs to 3.5 lbs. at finish line. I do NOT have a return. I used a good quality pump (dont remember what name brand is in this car) with -8 up to regulator and -8 from reg to carb. My thought is I need a jetted -4 return line at regulator so I can adjust regulator and maintain 6 lbs at finish line. I have plenty of -4 line and would need to only buy fitting that holds jet and my time to run it in car.
Would this help the problem or 3.5 lbs. is enough for a slow car?

01-20-2020, 06:13 PM	#1
Jeff Stout VIP Member Join Date: Dec 2001 Location: phoenix Posts: 1,484 Likes: 65 Liked 704 Times in 281 Posts	Question on loosing fuel pressure going down track. With a quality gauge mounted in front of me on windshield I can watch fuel pressure going down track. What is happening is the pressure is going from 6 lbs to 3.5 lbs. at finish line. I do NOT have a return. I used a good quality pump (dont remember what name brand is in this car) with -8 up to regulator and -8 from reg to carb. My thought is I need a jetted -4 return line at regulator so I can adjust regulator and maintain 6 lbs at finish line. I have plenty of -4 line and would need to only buy fitting that holds jet and my time to run it in car. Would this help the problem or 3.5 lbs. is enough for a slow car?