MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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denvermgb
Brad Carson
Aurora, Colorado
(104 posts)

Registered:
03/10/2008 12:45AM

Main British Car:
1975 MGB 350 SBC bored 0.040 over

authors avatar
Fuel line route
Posted by: denvermgb
Date: April 30, 2015 05:43PM

So I just replaced the floors in my '75 B. I have two Magnaflow mufflers that sit approx under the front foot well of each side. I need to reroute the fuel line so as to not pass over the muffler. I wanted to see what others have done.

Thanks in advance,

Brad
april2015 003a.jpg


theonlyiceman53
Bill Russell
Florda
(80 posts)

Registered:
11/18/2008 06:01AM

Main British Car:
77MGB 350 Chevy with LT1 heads

authors avatar
Re: Fuel line route
Posted by: theonlyiceman53
Date: May 03, 2015 08:16AM

Hey Brad,
I used the stock location and haven't had any problems. Sounds like my mufflers are sitting about the same place. If you have had problems it could be because of the lower pressure from being close to a mile high? If confronted with the problem I would probably go with a small heat shield and a layer of insulation on the back side of the heat shield. Perhaps some 1.5 or 2" tubing cut on it's quarters would be a starting point with mounting tabs welded on. I would also look to duct a little fresh air from the grill into the front of the heat shielding. You could go to the edge of the compartment along the inner edge of the sill area but the run would be longer and that would be the last thing you would want would be an extra meter of tubing. It also would be a lot less protected. My 350 sits down pretty low so that is a major consideration. The Vette front end and small OD tires are the reason for that.
Cheers,
Bill


denvermgb
Brad Carson
Aurora, Colorado
(104 posts)

Registered:
03/10/2008 12:45AM

Main British Car:
1975 MGB 350 SBC bored 0.040 over

authors avatar
Re: Fuel line route
Posted by: denvermgb
Date: May 03, 2015 10:51AM

Thanks Bill! Got and pics you could post?

Brad


rficalora
Rob Ficalora
Willis, TX
(2623 posts)

Registered:
10/24/2007 02:46PM

Main British Car:
'76 MGB w/CB front, Sebring rear, early metal dash Ford 302

authors avatar
Re: Fuel line route
Posted by: rficalora
Date: May 04, 2015 04:44PM

It's a bit hard to see, but I used a piece of aluminum as a heat shield on mine. It's on the passenger side between the muffler and fuel line. It's just a piece of about 18Gauge aluminum bent and mounted to the floor board...

[www.britishv8.org]


denvermgb
Brad Carson
Aurora, Colorado
(104 posts)

Registered:
03/10/2008 12:45AM

Main British Car:
1975 MGB 350 SBC bored 0.040 over

authors avatar
Re: Fuel line route
Posted by: denvermgb
Date: May 04, 2015 07:49PM

Rob,

That's a good idea. I noticed lots of different heat shields in the junkyard, I am also wondering how to attach a heat sheild to the under side of the car?

Brad


theonlyiceman53
Bill Russell
Florda
(80 posts)

Registered:
11/18/2008 06:01AM

Main British Car:
77MGB 350 Chevy with LT1 heads

authors avatar
Re: Fuel line route
Posted by: theonlyiceman53
Date: May 07, 2015 07:08AM

Hey Brad,
I don't have any pictures of the underside but it is just the standard location along the side of the rails using the rubber tubing holders. I did not increase the size of the supply line and that may be why I don't have any problems as it forces the fuel though the line faster and with less surface area to transfer heat. I knew there was a good reason why I didn't upsize it. I thought it was just laziness........ I have a fuel pressure gauge in the console and haven't noticed any starvation issues. I have to admit that I haven't thought to look when having the Maximum "fun".

For some reason, I'm only getting about 12 miles to the gallon. It's a lot of fun per mile though. Double pumpers aren't known for their economy. I wonder when the government will ban them? I'm only slightly kidding as I just found out our brand new washing machine won't clean my work clothes as some government regulation won't allow full hot water without bleeding in some cold to keep it under about 105 degrees F.

Cheers,
Bill


NCtim
Tim Shumbera
Western North Carolina
(238 posts)

Registered:
01/19/2012 04:35PM

Main British Car:


Re: Fuel line route
Posted by: NCtim
Date: May 08, 2015 05:41PM

There's our government to help us from ourselves. I've subverted all my low-flow plumbing fixtures. I have well water so I don't worry about the cost of a ten-minute shower with 104 water at 40-60psi.

Tim



denvermgb
Brad Carson
Aurora, Colorado
(104 posts)

Registered:
03/10/2008 12:45AM

Main British Car:
1975 MGB 350 SBC bored 0.040 over

authors avatar
Re: Fuel line route
Posted by: denvermgb
Date: May 17, 2015 04:17PM

New floors welded in, butyl rubber seams done, getting ready to apply second coat of bedliner (my wife loves the look with the knit hat, goggles, and respirator). I picked up a a large piece of heat shield from the junk yard yesterday. I am going to use the stock route for the fuel line and use the heat shield above the Magnaflows as Rob suggested. I am really ready to get back on the road!

Brad
MGB floor 002a.jpg


denvermgb
Brad Carson
Aurora, Colorado
(104 posts)

Registered:
03/10/2008 12:45AM

Main British Car:
1975 MGB 350 SBC bored 0.040 over

authors avatar
Re: Fuel line route
Posted by: denvermgb
Date: May 24, 2015 09:33PM

Got the fuel line, battery cable, and brake line routed and mounted today. The heat shield I have is from a BMW, basically, 4 pieces of aluminum smashed together. I have it trimmed to fit between the muffler and the fuel line/battery cable/brake line, ready for install. I ran the new fuel line as close to the carb as possible, the last few inches with rubber fuel line. The local drag strip requires a max of, I believe, 6 inches of rubber line. Perhaps I will post a few pics tomorrow.

Brad


MGBV8
Carl Floyd
Kingsport, TN
(3726 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

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Re: Fuel line route
Posted by: MGBV8
Date: May 28, 2015 10:15AM

I'd like to see that heat shield, Brad.


denvermgb
Brad Carson
Aurora, Colorado
(104 posts)

Registered:
03/10/2008 12:45AM

Main British Car:
1975 MGB 350 SBC bored 0.040 over

authors avatar
Re: Fuel line route
Posted by: denvermgb
Date: May 28, 2015 09:34PM

The rest of the weekend got away from me. I will post some pics on Saturday.

Brad


denvermgb
Brad Carson
Aurora, Colorado
(104 posts)

Registered:
03/10/2008 12:45AM

Main British Car:
1975 MGB 350 SBC bored 0.040 over

authors avatar
Re: Fuel line route
Posted by: denvermgb
Date: June 01, 2015 07:49PM

Here's the heat shield from a Bimmer. The picture of the 4-ply section was very blurry, so much for my photography skills. I thought I took a shot with the Magnaflow mufflers in place, perhaps next weekend. i thought this came out very well. Got everything buttoned up and found my battery is dead, got over 5 years out of it anyway...

Brad
mgb 003b.jpg
mgb 004a.jpg


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