|
|
Fuel Line Size
#371681
07/10/09 01:00 PM
07/10/09 01:00 PM
|
Joined: Jun 2005
Posts: 1,534
Florida
CHRGR69
OP
pro stock
|
OP
pro stock
Joined: Jun 2005
Posts: 1,534
Florida
|
71 Cuda 383 Eddy 750. I have a new fuel pick-up/sending unit that is 5/16". I'm told I should go with the 3/8" line. Will it work with the 5/16" unit, or am I defeating the purpose of the larger line? Should I change unit and go 3/8"?? 
Last edited by CHRGR69; 07/10/09 01:02 PM.
Grandma always said I had "hands of gold"!
|
|
|
Re: Fuel Line Size
[Re: Crizila]
#371686
07/11/09 03:48 AM
07/11/09 03:48 AM
|
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
64Post
master
|
master
Joined: Aug 2003
Posts: 8,716
Baltimore/Denver
|
Quote:
BTW, there are some guys on this forum that can make over 600 HP with a 5/16" line - - - they said.
John, if I didn't know better I'd think this was directed at me.  But then again, how would you know my tubing is undersized? 
|
|
|
Re: Fuel Line Size
[Re: Crizila]
#371688
07/11/09 01:24 PM
07/11/09 01:24 PM
|
Joined: Mar 2009
Posts: 73
Phoenix Arizona
thebankerstoy
member
|
member
Joined: Mar 2009
Posts: 73
Phoenix Arizona
|
I've always respected the fact that Chrysler used 5/16" fuel lines on low output big block cars and 3/8" on Hemi's and high output big block Wedge cars. I have a mildly modified 440 in my 66 Coronet 500 that puts out around 400 hp and I run a 3/8" pick-up tube and fuel line all the way up to the carb. For the fuel pump, I run one of the Mopar Performance hi-performance mechanical pumps.(part #P4007039AB) To keep the fuel clean, I have one of the Fram HP1 canister style fuel filters back by the stock reproduction fuel tank and a 3/8" in-line filter up front between the fuel pump and the Holley 750 cfm vacuum secondary carb. I've had zero problems with this set-up for many years. Richard  
Last edited by thebankerstoy; 07/11/09 01:28 PM.
|
|
|
|
|
|
|
Suggest you go to a 3/8" tank pick up. I couldn't buy one for my particular application, so I modifyed mine. Easy to do. Just take your existing sender, cut off the 5/16" line on both sides of the bung. Drill it out to 3/8" and solder in you new 3/8" line, duplicating the length and bend of the original line. If you are going to stick with 5/16" at the tank, no sence in going to a 3/8" line. It's gotta be 3/8" all the way if you want to benefit from a bigger line. If you are running a whimpy little street hemi, you can probably get away with the smaller line. BTW, there are some guys on this forum that can make over 600 HP with a 5/16" line - - - they said.
