Author Topic: Fuel pump application  (Read 4399 times)

Offline challenger_affair

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Fuel pump application
« on: November 30, 2014 - 09:23:07 PM »
I want to run a metal line from fuel pump to carb (carter), or at least up onto the manifold.  1970 Challenger 383, Carter carb.  I got a metal line from Year one that looks like it would fit well, but I can't seem to find a stock-type pump that has the right clocking of the outlet to use with that line (the pumps all seem to have the outlet facing out to the side of the car rather than back toward the engine).  I thought going to a metal line would be sensible but its becoming more of a project than I expected  :banghead:

Something like this Holley might be an alternative because the clocking is adjustable, although its relatively expensive http://www.summitracing.com/parts/hly-12-440-11/overview/ Also, it pumps at 6.5 to 8 psi.  Would that be an issue or do I need a regulator on it?  Not crazy about having to add a regulator if it isn't needed... 

If you have a metal fuel line, which pump and line are you using? 
« Last Edit: December 01, 2014 - 03:10:35 PM by challenger_affair »
1970 Challenger 383 RT Auto Plum Crazy




Offline cudabob496

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Re: Fuel pump application
« Reply #1 on: November 30, 2014 - 10:34:53 PM »
Holley regulators are only about $30 I think.  I have a high output
Carter mechanical fuel pump that puts out 6 to 7 psi.  8psi is
borderline for a carb, but you could always add the regulator later
if you really do have 8 psi at the carb, and its causing problems.
I have rubber 3/8 fuel line from the pump to the carb (which has a
metal dual feed line to the carb bowls) The 3/8 rubber line is convenient
for ease of routing.  Been running safely like this for 15 years.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

2011 Kawasaki Z1000

Offline challenger_affair

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Re: Fuel pump application
« Reply #2 on: November 30, 2014 - 11:32:30 PM »
So is it normal for the pressure to vary or would it be relatively consistent? 

I currently have a rubber line and its cracked in a few places, which is mainly why I thought to replace with metal.  CA gas has ethanol, which I understand is hard on rubber.   
1970 Challenger 383 RT Auto Plum Crazy

Offline cudabob496

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Re: Fuel pump application
« Reply #3 on: November 30, 2014 - 11:42:45 PM »
So is it normal for the pressure to vary or would it be relatively consistent? 

I currently have a rubber line and its cracked in a few places, which is mainly why I thought to replace with metal.  CA gas has ethanol, which I understand is hard on rubber.

Until the pump diaphram wears out, which could take years, should be pretty consistent, as long
as the fuel filter is replaced regularly.  The hose is about $1 a foot, so I would just change it when needed.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

2011 Kawasaki Z1000

Offline footin70rt

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Re: Fuel pump application
« Reply #4 on: November 30, 2014 - 11:52:24 PM »
If you ever plan on running down a track you will not pass tech with more than 12" of rubber fuel line total. It isn't that hard to bend your own steel line. Just use a good tubing bender and take your time. I just did one on my buddy's 67 GTX, did it about 20 minutes.
Thomas
Driving the same 70 R/T since October 1985
Native of Bozeman, MT

Offline burdar

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Re: Fuel pump application
« Reply #5 on: December 01, 2014 - 10:10:13 AM »
What is the application?  Post pictures if you can.

Year One doesn't make anything...they just resell parts that other people make.  Look through Fine Lines catalogue or give them a call.  They can get you the correct line for your application.  If they don't sell it, they can make it custom for you.

Offline challenger_affair

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Re: Fuel pump application
« Reply #6 on: December 02, 2014 - 12:30:37 AM »
What is the application?  Post pictures if you can.

Year One doesn't make anything...they just resell parts that other people make.  Look through Fine Lines catalogue or give them a call.  They can get you the correct line for your application.  If they don't sell it, they can make it custom for you.


Its a 1970 Challenger with 383 and Carter carb.  In their catalog, Fine Lines recommends this http://www.finelinesinc.com/rpc6806 and it looks a lot like the one I have, probably the same thing.   So how would I find a pump to use with that line?   

This carter pump is one of the few I can find that has a flare on the outlet, but again even if I custom make a line, the outlet clocking would require a tight U-turn coming right out of the pump to get back toward the engine...  http://www.summitracing.com/parts/crt-m3672/overview/
1970 Challenger 383 RT Auto Plum Crazy

Offline cudabob496

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Re: Fuel pump application
« Reply #7 on: December 02, 2014 - 01:56:55 AM »


Its a 1970 Challenger with 383 and Carter carb.  In their catalog, Fine Lines recommends this http://www.finelinesinc.com/rpc6806 and it looks a lot like the one I have, probably the same thing.   So how would I find a pump to use with that line?   

This carter pump is one of the few I can find that has a flare on the outlet, but again even if I custom make a line, the outlet clocking would require a tight U-turn coming right out of the pump to get back toward the engine...  http://www.summitracing.com/parts/crt-m3672/overview/


Maybe use rubber line the first 6 inches. But a U turn is ok, as long as you have proper fuel pressue. Unless your carb is brand new, I doubt
it would like more than 6 psi fuel pressure.  Use an accurate gauge for fuel pressure. those little ones that attach to your fuel line and are about
1 inch in dia are very inaccurate.  I had one once, and it had me using a regulator when I really didn't need one at all.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

2011 Kawasaki Z1000

Offline burdar

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Re: Fuel pump application
« Reply #8 on: December 02, 2014 - 09:42:21 AM »
Where did you get the pump?  Is it correct for your application?  I'd go to your local parts store and have them order in a new pump.  When it comes in, check it out before you buy it.  Some BB cars used a separate vapor separator between the pump and the carb.  Do you have that?  Maybe that's why things aren't lining up like they should.  Maybe someone with a 383 car can post a picture of the correct factory setup.
« Last Edit: December 02, 2014 - 09:44:14 AM by burdar »

Offline burdar

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Re: Fuel pump application
« Reply #9 on: December 02, 2014 - 09:49:49 AM »
Check out these two pictures.  The first one is of the vapor separator.  I'm not sure if all BB cars used this or not.
http://www.jacksautoparts.com/catalog/fuel/vapor.jpg

This next one is of where it mounts.  I'm not sure if this is exactly were it would mount on your application.
http://www.forbbodiesonly.com/moparforum/attachment.php?attachmentid=163064&d=1389894952

Offline Moparal

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Re: Fuel pump application
« Reply #10 on: December 02, 2014 - 11:20:23 PM »
I believe you have 5/16 fuel line, I think I have what you need here. I will take a picture for you if I can dig it up. It is a short factory piece, bent like you said you need, then the fuel filter mounts on it then the line snakes up behind the alt to the carb. I even think the 70 6k cuda had the same coming off the pump, but only in 3/8th.

Offline challenger_affair

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Re: Fuel pump application
« Reply #11 on: December 03, 2014 - 02:34:59 AM »
Thanks for the thoughts guys.  I don't have a vapor separator.  I got the pump because it was one of very few I could see with an inverted flare outlet.  I didn't fully think through the issue with the clocking...   :dupe:  Based on the application listed by summit its not correct for my year, although I'm not sure how much that matters in and of itself  :dunno: 

In any case, I'm less concerned with making that specific pump work as I am with finding something that will.  As I mentioned, the fuel line does look like it would fit otherwise, and make a straight shot into a pump that accepts a male flare nut.  Which pump that is, is what I'm hoping to understand...
1970 Challenger 383 RT Auto Plum Crazy

Offline challenger_affair

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Re: Fuel pump application
« Reply #12 on: December 06, 2014 - 03:23:07 PM »
 :wave:  I gotta believe someone on this site has a big block with a metal fuel line...   :1zhelp:
1970 Challenger 383 RT Auto Plum Crazy

Offline Moparal

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Re: Fuel pump application
« Reply #13 on: January 20, 2015 - 11:25:15 AM »
I usually make mine when I need somrthing, but I did dig out the fuel line bends that I was suggesting.  Then I thought about this thread again.  You ever get your issue resolved?

Offline swede-cuda

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Re: Fuel pump application
« Reply #14 on: January 20, 2015 - 05:36:33 PM »
 :clueless: did 383,s in 70 use a threaded fuelpump fitting?  :clueless: