The insulated fuel line on the small block looks nice and clean. However, the 440 has the distributor in that area, which makes routing more challenging. What kind of line insulation is it BTW?
ThermoTec.
https://www.summitracing.com/parts/the-18050?rrec=trueAeroquip, Earls, etc sell it too.
My concern with the above recommendations is that none of the companies responded to my requests for data on the effectiveness of their products. IE:
With A carbureted system,120 degree fuel in a steel line passes by a heat source like an exhaust manifold that is radiating 800 degree heat for 2 feet. The line is X inches away. and the flow rate is Y under the same controlled conditions
The fuel exit temperature without your product is ? A
The fuel exit temperature WITH you product is? B
Keeping in mind that with a carbureted system some of the fuel may be sitting next to that manifold while idling or cruising so the flow rate is critical especially at lower speeds / idling.
While I realize it may be hard to give a clear answer as there are many variables involved but a few "Static laboratory tests" would show / prove the effectiveness of their product.
I compare them to the thermal sleeves on spark plug wires that work for a short time.
They do accomplish what they were marketed to do though, and that is GET $$ form your wallet to THEIRSThe one method that does work but is a PITA to implement is to run a return line to the tank with a restricted ID that will keep the unused fuel moving back to the tank while maintaining adequate pressure at WOT.
This is why the fuel injected vehicles don't have issues.
