[HWYSTR455]

Many people continue to have issues with the 550 & 1100 pumps, some are due to vapor lock/heat, some from poor/inadequate plumbing.

On the one Power Tour I was on, vapor lock was experienced by folks even with excellent mech pumps and plumbing, some even with electric pumps. You start sitting in traffic, the asphalt is 110+ degrees, and it cooks the fuel in the tank and lines from the ground up. (radiant).

The solution is more psi, even with carbs. Run a bypass regulator as close to the carb as possible, and you greatly reduce the chances of vapor lock. In tank pumps are best, but it can still be done with external pumps with acceptable results.

Deadhead pump setups don't last as long as bypass ones. Period.

I have seen these discussions for years, on here, and in person to person conversations. In the end, everyone ends up going to a modern fuel system, if they want to be able to drive their' cars (or perform). Pump gas these days is more susceptible due to the alcohol, but it did happen back in the day, too.

I have heard so many say they 'get by' with pusher pumps, etc, but in the end, they all buckle to a modern fuel system. (or live with sub-standard results) Many don't even realize they are having issues, until they upgrade. The results speak for themselves.

You can't cheat physics.

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