Gas Lines: Rubber Vs. PTFE
Planning on redoing fuel lines this winter, and had originally planned on rubber braided stuff but seems like PTFE is better (and pricier).
Car is non E85. Anyone have experience with either, and what would you recommend? |
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I helped another friend do PTFE lines on his circle track race car because he runs methanol. They are not worse to do than rubber. |
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Currently have rubber lines up front and no overwhelming gas odors so, torn. |
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If you do PTFE you 'll, essentially, never have to change them again where rubber you definitely will after 5+ years unless you drain all the fuel out of them all the time
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I would do PTFE. I Did my whole fuel feed and return system just this past winter. It was worth it (for me) to just go all out and do it once and have them be done for good on the car. everything from the tank to meeting up with the fuel rails is PTFE and -AN fittings. -8 feed and -6 return. cost a few hundred dollars because I bought about 4 feet EXTRA of each size of line, extra fittings, extra olives, and some billet clamps to hold both lines together. all from RACETRONIX
I just knew that if I did PTFE it would eliminate me having to go re-do them anytime in the nearby future. I also knew that E85 isn't around us NOW, but that PTFE will be totally fine if it does come up for future use after the engine project is done next winter. |
PTFE! all pump gas has some ethanol in it.
Once and done in the long run it's worth the extra expense. |
So, almost ready to pull the trigger for this winter project.
Question now, my thought was to add another bulkhead fitting to bottom of tank for return line. But, then I got thinking what the "proper" way to return fuel to tank may be. Any thoughts? Overthinking things again? |
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Do you need a check valve to prevent fuel backing up into fuel line or fpr is good enough?
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My concern with running return line bulkhead up top is I have no way to not spraying fuel in tank and aerotating the crap out of it. Whereas a sump return in theory minimizes that. Either way tank is coming down, so guess I will come up with something soon |
Why not put a line in the tank that dumps it on the bottom?
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More ramblings from a bored imagineer.
I am going to leave a check valve in one line out of top of tank, should be fine leaving the non vented cap on filler neck? And how far can the fuel pump be from tank? Assuming its lower than sump. |
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Probably best to ask the pump manufacturer. |
And PTFE won out, my wallet lost. This is just for the feed, gonna tackle the return after I get this setup.
https://i.imgur.com/8BS1fsKl.jpg |
good choice
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yup, great choice, should be good for a very very long time.
my filter is very much the same. I didn't bother to open it up this year to inspect the element.... wasn't sure that I needed to after only 10 months of use. any idea how often to check/clean/replace these types of filters? |
Why not all black fittings?
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