JohnC Posted March 5, 2021 Report Share Posted March 5, 2021 10 hours ago, Kenrow said: Be aware that while, Nylon 12 does have better chemical resistance than Nylon 66, the tensile strength is lower and the melting point is lower. If fuel line melting is a potential issue, I suggest an airtight engine room with inert gas flooding. Works on a warship... But seriously, is the melting point at a temp likely to be seen in an engine bay other than when on fire? If it is, then defo no-no. If not, I'm not sure what the issue is? And I do mean "I don't know". Seems to me that if there's a fire, no fuel line will maintain its integrity. But I'd be curious to know if that's not the case. John Quote Link to post Share on other sites
astontr6 Posted March 5, 2021 Report Share Posted March 5, 2021 1 hour ago, JohnC said: If fuel line melting is a potential issue, I suggest an airtight engine room with inert gas flooding. Works on a warship... But seriously, is the melting point at a temp likely to be seen in an engine bay other than when on fire? If it is, then defo no-no. If not, I'm not sure what the issue is? And I do mean "I don't know". Seems to me that if there's a fire, no fuel line will maintain its integrity. But I'd be curious to know if that's not the case. John Does Nylon 66 have a good resistance to E10 petrol which is going to be introduced here in the UK this Summer? I replaced all my old injector hoses at my engine rebuild with nylon 66 4 years ago, seems to work OK with E5! Bruce. Quote Link to post Share on other sites
OldBob Posted March 5, 2021 Report Share Posted March 5, 2021 (edited) 4 hours ago, astontr6 said: Does Nylon 66 have a good resistance to E10 petrol which is going to be introduced here in the UK this Summer? I replaced all my old injector hoses at my engine rebuild with nylon 66 4 years ago, seems to work OK with E5! Bruce. Bruce, E5 petrol will continue to be offered in Super octane form and since were talking about TR5 & TR6's I doubt owners would want to use the lower octane E10 petrol anyway. Bob Edited March 5, 2021 by OldBob spelling Quote Link to post Share on other sites
Kenrow Posted March 6, 2021 Report Share Posted March 6, 2021 I do not think the melting point or tensile strength are big issues. Some manufacturers of Nylon 12 do not recommend it for fuel. Not sure why as it is one of the most resistance plastics out there. Quote Link to post Share on other sites
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