In tank hose?

I am aware of J30R10, but most modern cars use PTFE. I am rebuilding a pro level fuel cell from the early 20teens, and they used BMRS stuff. Of course this is big dollars. The lines seem to be in adequate shape (still soft, no rubber in the fuel filter) so I plan to reuse them. They likely sat with out fuel in them for more than half their life.

The question is when I do redo this thing, I was hoping to stay with from BMRS for cost. Plus the hassle of having them crimped. In my less complex cells I just have used PTFE tubing like OE stuff, or even PTFE stainless braid for a straight run.

My biggest question is end treatments to get to AN. Using just typical nipple fittings, or pushlock style hose ends? I would think someone would have created a line of fittings specially for this application, but maybe most people that go AN in a fuel cell splurge for BMRS(etc).

Thanks.

Jordan,

What are you trying to connect specifically?

While you have things apart I would note the lengths, fittings. That way just in case you decide to stick with what you have, you can have BMRS build and ship you finished product you can swap in later.

Most in tank fuel pumps have a nipple style outlet, so submersible polyamide nylon with a quality clamp is a simple inexpensive, but reliable option to get from there to an internal surge. I wouldn't feel I need AN there for example.

If you're looking to connect from a pressure pump outlet nipple to the bulkhead, Radium Engineering has some really interesting options including nipple to AN adapters with and without check valves for multi pump systems.

https://www.radiumauto.com/Fuel-Pump-Outlet-Adapter-Check-Valve-P1709.aspx

Potentially related, I'm also a fan of their fuel cell surge tanks which simplify installs take care of the pressure pump to bulkhead connections, and their new FCST-X model makes swapping pressure pumps out so much faster and easier than ever. No more worrying about the tank flange o-ring or disrupting other things in the tank, only a few bolts come out vs. all the tank flange bolts, etc.

https://www.radiumauto.com/FCST-X-Fuel-Cell-Surge-Tank-P2854.aspx

If you think any of their items might help your efforts, it may be worth giving them a call. I always enjoy coming up with solutions with them.

Thanks Mike, pretty much what I assumed. Just wanted to make sure there wasn't something new I was not aware of.

This cell is quite complex/odd for what it is. One it is short and wide, which makes fuel control tough. Also there is not enough room for a "drop down" system from the top. It has two built in sumps, one main and one reserve(1gal or so) and I guess they didn't want to shoe horn the pumps in there, so they put the pumps in the main area of the tank. This also put the pumps right in front of a huge access port so if you have a failure you can relatively quickly replace the pumps. So on top of the corner lift pumps, we have 4 total pumps with the two mains running off of two surge tanks and related lines/pickups/screens. So lots of returns/overflows and so on going on + check valves.

Nothing crazy, but definitely a lot more lines that is probably required.

ill probably just stick with the BMRS stuff, and maybe with the next cell ill redesign it to include more traditional pumps in the surge tanks. Would make things a lot simpler.

Gotcha, I've worked on a few setups like that. Often it was an elaborate bandaid for one particular track and the complexity wasn't required most of the time, but stuck around.

Years ago I was really hoping hydramat would be the end of corner pumps, but it didn't work out that way.

BMRS makes great stuff and in a submerged situation I really don't trust many things. Based on what you're describing, sticking with BMRS until you do a redesign seems the best move.

I can confirm the PA nylon from Radium works, and if you're ever in a pinch somewhere, NAPA carries high pressure submersible hose, while most parts stores do not.

Depending on the NAPA store, they may only have short pre cut lengths, or a spool, sometimes only 5/16", sometimes also in 3/8". I've had that hold up for years after some out of town repairs.

What was the issue with the Hydramat, Mike, they were a bit expensive, but they looked like they would be worth it for many setups?

Mixed experiences didn't lead to the high adoption rate I anticipated.