Fuel line routing?

[TouringBubble]

He runs them with carbs, so I'm guessing he likely uses the stock line. I need more flow for E85 and a LOT more pressure for EFI.

I think I've got a good idea now though. The fuel cell will be in the stock tank area. Planning to relocate the battery up front too to simplify wiring and move the weight balance a little. Pump will be under the hood and I'll route lines in the lower channels under the pan. I might have to use both sides ... one for send and the other for return. Not sure yet. Those lines are pretty rigid, so I'm not sure I can fit both in one channel with some of the bends required.

[edtype1]

Matt..If its strictly for Rallycross, run braided outside the cabin. Heck it doesn't matter what fuel you use. Its flammable! You don't want that in the cabin with you if shit happens. Maybe even if your wearing a flame suit. In rallycross, its very unlikely....Don't over think!
It will be a royal PITA to run them through the channels. All that trouble for no gain. Keep it simple & neat.

[TouringBubble]

Going back to this topic, I think I have my routing figured out. I'm going to run the lines in the channel where the body bolts to the pans.

BUT, I'll need to shape the line a little. I've read where people boil the nylon lines to fit them over barbs and such. Anyone see issue with using a heat gun or similar to warm them and shape them in angles less than 90º? I just need a couple of bends to make them conform to the chassis and not hang down.

[Cholewa]

Originally Posted by TouringBubble

Going back to this topic, I think I have my routing figured out. I'm going to run the lines in the channel where the body bolts to the pans.

BUT, I'll need to shape the line a little. I've read where people boil the nylon lines to fit them over barbs and such. Anyone see issue with using a heat gun or similar to warm them and shape them in angles less than 90º? I just need a couple of bends to make them conform to the chassis and not hang down.

If they're anything like the stock volvo lines, so long as they are brand new, you need to heat them in order to let them seal, but once that initial heating is done, you can't reuse them. As for shaping them, they should be pretty flexible. Consider wrapping them with some sort of light foam or running them through a stretch of rubber hose and you shouldn't have anything to worry about with them bending around certain parts.

[jledford]

We put the nylon into form fixtures and then inject steam inside the nylon at a specified temp and pressure for a certain amount of time. The parameters we use all depend on the nylon, PB562, PB443, PB444? After that we cool them by pushing water through and then compressed air, the times for each depends on the set we need for the form and nylon used.

As for inserting the quick connectors or inserting a steel tube into the nylon we just flare the ends of the nylon and then force in the connectors using automated insertion machines. The connectors are dipped in a lubricant before the process.

Of course that's just how we mass produce nylon fuel and vapor lines for an OEM. That might be a bit more than you need to do for your one off application

Edit: To add something that might be helpful the heat guns work great for getting the quick connects back out of the nylon. They tend to overheat and melt the nylon and would be difficult to use for forming purposes. Again depending on the nylon used heating inside out or outside in can make a big difference.

[TouringBubble]

That is good info. Thanks!