[Tigers] 3/8 fuel line

[genepadgett at comcast.net]

Theo, 

Thanks for the advice. 

I decided to go with bulkhead fittings into and out of the trunk area for the pump mounting rather than lines through grommets because of vibration concerns. I have a short length of curved rubber hose on one side of the pump and a vertical stainless steel braided hose on the other side to deal with any pump induced vibrations. The pump is mounted to the back wall of the cavity with ignition box isolation bobbins. The vertical routing tucks in nicely to the curvature in the back wall. The battery cannot get to it even it it slid all the way forward. I may still cover that vertical braided hose section in metal shield (like under the trunk) just for added protection. 

I ended up running the output side up just inside high part of the trunk battery cover floor to a formed 90 degree formed curve "no loss" Russell fitting connected to a straight through bulkhead fitting. A little different from what I have seen others do. But this gets me to near where the original line cuts over above the panhard rod. From there I can pretty much follow the original line routing horizontally over to where the brake and fuel line go through a clamp, past where the SU pump was connected and forward through the tunnel. I will make sure all the hold down points have a rubber wrapping. I also am wrapping the line that is under the car and through the tunnel with Cool-It insulation tape. 

My plan is to run the line to the carb up the back side of the engine bay along the firewall. I have not yet decided on the specifics. I certainly do not want a solid connection of aluminum tubing to a carb on a rocking motor. My current thinking is at some point go from the aluminum line to a length of insulated flexible fuel line like the nitrous crowd use in their setups. Any ideas from you or anyone else on how to do that engine bay routing would be appreciated! 

Gene 
----- Original Message -----
From: "Theo Smit" <Theo.Smit at dynastream.com> 
To: genepadgett at comcast.net, tigers at autox.team.net 
Sent: Friday, November 30, 2012 9:18:40 AM 
Subject: RE: [Tigers] 3/8 fuel line 

That's a good idea. I cut my 5/16" line to about 3 inches long where it came off the compression nipple, and then soldered that into a 3/8" line and ran it the rest of the way. 
I eventually found a good tubing bender that would do 3/8" line reliably... most of the tools out there won't properly do anything near a 90 degree bend without kinking. 

If you're using aluminum line then be really sure that it's supported everywhere, because any line vibration will cause it to work harden and crack; and make sure that the supports, if they're steel, are sleeved in rubber so you don't get electrolytic corrosion of the aluminum against the steel. 

Cheers, 
Theo