Vapor lock

[WEBEZEEed]

For those of you who have experienced it , can you describe just what it feels like when it happens? Thanks!

[JMortensen]

My experience was at a race track, but it started with a sudden, noticeable loss of power, exhaust note went totally flat and car sounded like it was farting, pulled into the pits and stopped and opened hood, car idled progressively worse until it finally died. Waited an hour, jumped in the car and it fired right up and ran great. It only happened once and it was 105º that day.

[briann510]

the engine just doesnt usually wanna go much over 3500 rpms when its vapor locking. we had that problem last year and fixed it by a bigger return line and wrapping the fuel lines under the hood with heat wrap and putting a heat barrier between carbs and header. it went away after that.

[Guest 305240]

The 260s had a electric pump at the tank as well as a mechanical pump. They run pretty lean to pass smog. The dual pumps were susposto eliminate the vapor lock. At least that's what I was told. I kind of like the idea myself.

[JMortensen]

The 260s had a electric pump at the tank as well as a mechanical pump. They run pretty lean to pass smog. The dual pumps were susposto eliminate the vapor lock. At least that's what I was told. I kind of like the idea myself.

Electronic pump was the cure for me too, but I went a little farther. I also removed the stock mechanical fuel pump and rail. I think these two items put a lot of heat into the fuel because they're bolted to the head which of course gets pretty damn hot. Once I had removed these things I ran a rubber fuel hose to the radiator support then back to the SU's on the other side and that was it, never had the problem again.