New carb and Fuel lines?
So i'm going to put a edelbrock on my car, and i know it runs at about 5.5 or 6 psi. So i got a carter fuel pump that pumps 7 and a holley 4.5-9 psi regulator. any way, the pump recomends using 3/8" line. The stock line on my '79 is 5/16" i believe. Do i have to up the line size? and if i do, what do i do about the line size from the tank as it a hard line 5/16" into the tank.?
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It runs alot cooler like that and extends the life of the pump if you run 3/8". I'll be running that for my feed and return on my FI setup
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Originally Posted by dj55b
(Post 7250149)
It runs alot cooler like that and extends the life of the pump if you run 3/8". I'll be running that for my feed and return on my FI setup
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there would be no point changing all the other lines to bigger lines if those are going to remain stock. A system will only flow as much as its most restrictive point. Some people have taken them out, drilled in bigger holes and JB welded them in there.
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Originally Posted by dj55b
(Post 7250795)
there would be no point changing all the other lines to bigger lines if those are going to remain stock. A system will only flow as much as its most restrictive point. Some people have taken them out, drilled in bigger holes and JB welded them in there.
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It will still be the same pressure regardless of if you just do the front, because onces the fluids fill up all the lines, they will only flow just as much as its biggest openning. Personally I'm actually going with an Intank pump for my FI stuff which is why I was selling my carb stuff.
But for the 79 tanks I'm not sure exactly how they are, but I know that the 81-83 cars are a little harder, than say the 84-85. Because the 84-85 car you can actually remove that part. If you search this forum you will be able to pull up from pictures. |
Originally Posted by dj55b
(Post 7252858)
It will still be the same pressure regardless of if you just do the front, because onces the fluids fill up all the lines, they will only flow just as much as its biggest openning. Personally I'm actually going with an Intank pump for my FI stuff which is why I was selling my carb stuff.
But for the 79 tanks I'm not sure exactly how they are, but I know that the 81-83 cars are a little harder, than say the 84-85. Because the 84-85 car you can actually remove that part. If you search this forum you will be able to pull up from pictures. |
What do you mean unless they know how the insides are? Like I said you can do yourself if you wante too, but there should be some speed shop that will be able to do such a thing.
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Originally Posted by dj55b
(Post 7286043)
What do you mean unless they know how the insides are? Like I said you can do yourself if you wante too, but there should be some speed shop that will be able to do such a thing.
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I'd leave it at the stock 5/16. My REPU has a Carter that was installed 10 years ago. The line size is 5/16. No problems. Actually the only problem it ever had was due to the stock rubber hoses having been stretched over the 3/8 nipples on the Carter. I had to repare them when they started leaking. I had to splice in a couple short 3/8 pieces of fuel line and some 5/16 metal tubes. The 3/8 line squeezes down to 5/16 a lot easier than 5/16 line stretches out to 3/8.
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I've got an extra '83 pick-up tube that mounts to the tank. It runs down inside and has a curve in the line inside the tank. I'm going to swap my '83 tank out to an '84 SE, so I could possibly drill out the pick-up tube in one of my '83 lids and weld in a 3/8" hard line for you. I've got all the parts I need to do it, but I won't be home until tomorrow and could possibly get to it this weekend. I've been welding for years and have all the right equipment to perform this modification with no problem at home. If you'd be interested, PM me and we'll discuss it. I won't try to rape you with the price either. Thanks...
-Adam Collins |
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