hi

what is everyone doing to reduce vapor lock on hot days ?

pump gas users ?

cars without return line and stock pump ideas .

any good covers for fuel lines ?

thank you !

On my cuda, the best thing I did was go to a return style fuel system. I know that's not what you asked, but it made a HUGE difference when using pump gas on the street.

My dad's road runner has a stock style fuel system and seems to do fine. Admittedly he doesn't drive it much and it doesn't have nearly the amount of heat under the hood that my car does.

My Father used to put clothes pins on the gas line!! No joke. Back in the 50's we used to tow my race car with a 52 Cadillac which was bad about vapor locking. We tried the clothes pin trick but it never worked very well. What we ended up doing was carrying a canteen of water and when it vapor locked we would pour water over the length of gas line under the hood. That always worked but it was a big pain. One day my Mother was driving the car and it vapor locked in an intersection. She left the car there and called the old man to come get it. She never drove that car again.

Only true fix is some sort of return line.

I will mention, you can do a return line/dead head system hybrid. I often use this on my return systems where I switch between carb & throttle body. So I typically run the return line from the regulator down on the frame rail, but then run it dead head up to the throttle body or carb. I typically do this on throttle body systems as opposed to full on efi system with fuel rails. Works really well. Potentially, you could still vapor lock it, so I run a heat shield over the dead headed section.

Some other tricks:

Paint the intake with a heat blocking paint.
Stack a few carb gaskets underneath the carb.
Holley carb heat shield
Heat shield all the fuel lines
Phenolic carb spacer

x2 on carb spacers. Isolate the carb as much as possible, either with plastic or wood.

Also try to find ethanol free fuel instead of E10 (or race gas), and make sure it's fresh. Winter blend fuel in the summertime is the worst combo for vapor lock.

Heat shield on fuel line

Routing fuel line away from block (heat source)

what heat shield material is that autox ?

Firesleeve

Lots of companies make/sell it: Aeroquip, Parker, DEI

Thank You !

Wooden clothe pins work well in the summer in the Mojave desert
Clamp on several and go