header to fuel lines clearance

[WSSix]

Looking for opinions on how close I can safely have my headers to my fuel lines. I'm going to make it so the header is as far away as I can get it from the fuel lines. However, they are on the lower portion of the firewall so they run through the same area as the header. I'll probably wrap or cover the fuel lines with high temp sleeves as well just because I like to be safe. So, what say you about how close you'd have a primary tube to the fuel lines?

I have Earls Prolite 350 lines.

Thanks

[Vince@Meanstreets]

since its a hose I would say at least a 2" air gap.

Aeroquip hose has a nomex outer layer and would be a better choice.

[WSSix]

Thanks Vince. I appreciate the feedback. I have thermocouplers at my disposal with my new job. I'm going to test the area once everything is back together. I just wanted to design it so that I hopefully don't have to make changes.

[Neil B]

IMO, you need hard line with fire sleeve on any runs next to the exhaust.

[WSSix]

Thanks Neil. The lines really just kind of cross paths with the headers versus running side by side. So close proximity is limited greatly.

[Sieg]

FWIW - I safety wired thermal wrap around the OEM hard line. This picture is from the bottom looking up.

http://photos.smugmug.com/photos/i-HT5fmqG/0/XL/i-HT5fmqG-XL.jpg

[WSSix]

Thanks, Scott. I intend to do something similar most likely with my hoses. I won't be anywhere near as close as your line is either.

[70 chevelle]

This is perfect. Comes in multiple sizes an doesn't draw attention to itself. http://www.summitracing.com/parts/dei-010470 . I use it anytime fuel of brake lines run near a header.

[RdHuggr68]

This is perfect. Comes in multiple sizes an doesn't draw attention to itself. http://www.summitracing.com/parts/dei-010470 . I use it anytime fuel of brake lines run near a header.

I used this on my starter cable routed to my trunk, it was close to the headers so I sleeved it and it worked great.

[WSSix]

Thanks, Tony. I'll keep that product in mind.

[GregWeld]

To me the question begs the question -- why would you run fuel line near this heat source to begin with?? Why not just reroute it so you don't create the problem??

[WSSix]

Fuel line was there first when I only had manifolds and a regular exhaust on the car. It was miles away then. I'm just trying to keep from rerouting the fuel lines now. The LT1 takes fuel in and out from the rear so the lines will run along the firewall some how. The good news is, it looks like I'll be able to route the primary and not get close to the fuel lines. I'll get it mocked up today to verify but I think my current ideas will work well.

[Neil B]

FWIW - I safety wired thermal wrap around the OEM hard line. This picture is from the bottom looking up.

http://photos.smugmug.com/photos/i-HT5fmqG/0/XL/i-HT5fmqG-XL.jpg

My '69 is the same way in this spot. I bent the hard line for max clearance and then wrapped it in fire sleeve.

[WSSix]

Well, it looks like this won't be an issue after all. I think I have figured out a way to run the primary so it doesn't come close. The issue I have now is can I run the other primaries while leaving the current ones I have laid out alone. I'm hoping I can because if not, it's redo everything I have laid out already. This is like the most ridiculous jigsaw puzzle ever.

[Vince@Meanstreets]

there is always a way. thats why mock up is the most important part of doing custom stuff.

[WSSix]

Very true. That's why I'm also not doing anything beyond tacking the tubes in place before I verify the exhaust fits. I think I'll be fine but I sure don't want to find out I'm not and then be really screwed.

[WSSix]

I've got the passenger side header tacked up. I've pretty much verified the exhaust is going to work as well. So the header design is good to go. I ended up with the closest primary being 3 inches away from the fuel lines. Glad this wasn't a concern after all. Thanks again for the replies.