Vapor lock- additive?

Not saying I’ve got vapor lock at all. I’m just reading the tea leaves here Rusty. I’m stuck in a loop on Boob tube that almost every car video that pops up lately is about vapor lock. The why and how but other than a mechanical fix- nobody is addressing how to fix by adding an additive, like the fuel companies did back when we were kids. 60’s and 70’s cars until
Charcoal canister emissions never had a return line. You vented thru the gas cap and did not deal with vapor lock. It’s only because of modern fuel do we deal with it. The quick burn stuff evaporates easily from what I am reading. How do we keep that from happening without a closed loop system. I’m not sure if I’m not dealing with it because I’m running 3/8” metal line to the big Carter fuel pump or my current additive or **** luck.

Modern (if that’s what it really is because we are stuck with it) pump fuel has a fairly slow burn rate and it vaporizes very poorly.

Pour a cup of pump gas on the floor and watch it. Then do the same with a race fuel and watch the difference. If you really want to check things out, do the same thing with methanol.

Because the fuel is under much higher pressures with an injector the fuel is blended for that rather than the 7 psi that carbs use.

That’s why today it’s harder to get a cold air intake to function. Today’s fuel needs more heat to get it vaporized and a cold intake (like an air gap or tunnel ram) doesn’t have enough heat to do it.

I’m guessing that’s one reason why I think you can run more compression on pump gas than once believed.