First post here and this topic stood out to me.
Thought I would share my story and how I have figured this out.
ANY rubber hose is dire in my experience. Even those here that have said they've had failures with R9. With the cost of these vans and how much we spend, I would be looking at something else.
In MSA racing, there is a rule that states that any flexible hose longer than 6inches has to be stainless over-braided...
Now my issue with ANY over-braid is that the first you know that the rubber has perished is the wet braid. This is NOT COOL!.
At least with the R9 type stuff, you can do a quick health check (bend it slightly to check for cracks..) before you set off. But regs are regs, and I had to sort something out.
So during my hunt for fancy red/blue aeroquip fittings to plumb my fuel and oil on the 2276, I discovered PTFE / Teflon hoses.
This is a hard PTFE inner with a Kevlar / Stainless overbraid. You choose. But basically this stuff is good for Hydraulics, (if you run a high pressure Fuel Injection. ) but also it will run Race Fuel and Ethanol without perishing.
It's that good, that it's MSA approved in Rally cars to be run INSIDE the cockpit. This is one of those rules that is normally a massive NO NO. NO FUEL LINES IN THE CAR... But this stuff is that good.
It is more expensive, (upwards of £10 per meter) but not a whole heap when you factor in the cost of relentlessly replacing rubber hose because you've had it a yr and don't want it starting a fire. That R9 stuff is not cheap either.
Now Granted, it's meant to be used with the AN / JIC style fittings, but this is not mandatory. If you have the right size hardline or (PTFE hose that matches your hardline..) and a good fuel clip it's fine. My engine is all AN style fittings but my hardline from the tank is just a hard line so one end that feeds the Fuel Reg is mounted with a Hose Clip.
Tho spending out on the AN Fittings has saved my life many a time. When I'm taking the engine out, or carbs off, I'm not having to constantly fight a hose stuck on a barb. I just use the wrench and refit it. Plus the fittings are reusable if you do end up replacing the hose.
I am using 8mm hardline so I purchased AN6 Hose. But it can be in smaller sizes.
I'm not affiliated with anyone so am not selling this to you (Even tho it sounds like an advert and this is my first post!
) , I'm trying to save your necks and frustrations here. I saw the topic and had to pipe up. (no pun intended)
Buy from your own preferred supplier.
You can buy it from Earls etc, or like I did, from http://www.torques.co.uk
If it's good enough to satisfy an MSA Scrutineer then I'd say it's gonna be WAY ok for your street car.
If anyone wants to see this stuff I can get some photos of a few spare bits I have and also the install on the car.