Paul, I'm not entirely convinced that insulating the fuel line will make a lot of difference although that heat reflective sleeving Nick pointed out would probably be your best bet. I suspect that most of the heat gain to the fuel, especially in traffic where the flow is low comes from the pump and carb float bowls. Especially the carbs as they sit directly above the exhaust. Can't remember, but does your 6 have an electric fan? If not I suspect that might help, just by moving air around under the bonnet.

Not really done much of it myself. For fuel lines. Little bit on starter cables. Good idea in principle. Finding effective insulation at a sensible prices may be challenging.    bit of fairly random internet scraping produced these https://hilltop-products.co.uk/heat-reflective-sleeving-hrs-12.html?utm_source=google_shopping&ppc_keyword=&gad_source=1&gad_campaignid=21545364654&gbraid=0AAAAAD_OVsFrPvDoJTKXU-Dje95sJ4d2P&gclid=CjwKCAiAv5bMBhAIEiwAqP9GuNzdaUgFEEFfdtUDfU3K0MoQvuh4TaD2zkyP58NcMzSsWIoleP6mLhoC1VQQAvD_BwE https://www.ebay.co.uk/itm/152428198043?_ul=GB&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338365712&toolid=20006&customid=CjwKCAiAv5bMBhAIEiwAqP9GuADPNJWN_UMYfH2l1j9Nu-JuZlB4fOg-9jXQvfsDVbyLXAcTzeJgnxoCswUQAvD_BwE|0AAAAA9SEzLMNVaOsUsaY6_vsuXWHAt2E9|null&gclid=CjwKCAiAv5bMBhAIEiwAqP9GuADPNJWN_UMYfH2l1j9Nu-JuZlB4fOg-9jXQvfsDVbyLXAcTzeJgnxoCswUQAvD_BwE&gbraid=0AAAAA9SEzLMNVaOsUsaY6_vsuXWHAt2E9&loc_physical_ms=9045690&adtype=pla https://www.burtonpower.com/black-high-heat-silicon-heat-sleeving-7mm-dia-x-0-5m-funk-sitb-0705.html?utm_source=google&utm_medium=prodlistad&utm_campaign=gb_feed?WbRf=ProdListAd&gad_source=1&gad_campaignid=213615082&gbraid=0AAAAAD9KqFo-NKLEO4Zc7AeZfkFdX1j54&gclid=CjwKCAiAv5bMBhAIEiwAqP9GuChb1ElEWjp84s51DeSa5G3wCMTBfFyQD4engOAgk1y_OtptRv1RBxoCcCQQAvD_BwE   I would suggest minimal gains on a low pressure system feeding carbs, especially where there’s no return loop.  More appropriate for injection setups returning warmed fuel to the tank.

Thank you. yes, I did. Almost done. Wallace and Hutch the rabbit just need a wee bit more painting to finish.

Nice. Did you build it?

How easy is it to obtain Paul? I ask as I am based on the Californian coast just now, and therefore it is workable and I can get it onboard, I could fetch it back with me in April and send it on from the UK? Might make the delivery costs more manageable. Phil

Took mine off once I'd got the hot engine bay air to vent better.

Ha ha.   Thanks John.  It’s not magic, it’s actually just maths when you boil it down.  I was lucky enough that my school introduced me to it back in the 1980’s.  Doubly lucky to have been able to parlay that understanding into a career that doesn’t seem like work(except for the hours). I have no god complex about running Sideways.  If someone else comes along with the skills, the passion, the will, and the blessings of our elders like you and Nick et al, I’ll wish them luck and give them the keys. Until then you’re stuck with this gumpy old Aussie.

I am more that happy to treat this as if I watching the Great Marvello, magician and wizard without equal!    I appreciate and am grateful that he exercises his Talent for our benefit.   To have him explain what he does would make the act much less enjoyable, so please keep on prestidigitating, Craig!  John

If I had spare time I’d have a running LBC

How about a fuel cooler?    They are commonly fitted to modern diesels.    On my race Vitesse, the fuel is compressed twice, slightly by a Facet then by the Pi pump, then recirculated via a swirl pot, I found that temps tabs showed it getting rather warm.  I've now fitted a cooler in the return line from the swirl pot to the main tank.  I chose this one because it's compact - some are lengths of pipe with fins attached - about the size of a paperback book and I mounted it vertically under the boot floor, where it will get air flow, but be protected from stones.  Here it is being fitted into a bracket on the bench.  Since then it seems to work, the tabs haven't shown any excessive heat.