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Michael Cecil wrote: > At 09:42 PM 12/18/2005, Constantino Tobio said: > >regular unleaded states the boiling point is 77 deg F. > > 77F is about room temperature here in Texas. I think I'd have noticed > the last time I got gas, if it was boiling. Maybe that is 77C? > Boiling in scientific terms is when a liquid changes from the liquid to gaseous state throughout it's volume, while evaporation is when the surface of the liquid enters the gaseous state. Boiling would then mean a bulk vaporization of the liquid (rate to be determined by the chemistry of the liquid in question, and atmospheric pressure). Set out a bowl of gasoline in the sun when the outside temp is greater than 77 deg F and come back in a few hours. (well, actually, don't do this, as you might start a fire) How much gasoline is left? It's really no accident that gasoline is stored underground, in the shade, where it is kept relatively cool (well, it maximizes the real estate, also.) Here's the MSDS I quoted: http://hazard.com/msds/f2/bvg/bvgzs.html Boiling Pt. is 77F, 25C If you peruse other MSDSes on this site, you'll find gasolines with even lower boiling points. It's fairly surprising that gasoline has such a low boiling point, huh? It does explain a lot when you consider problems such as vapor lock or this FI-specific problem. Your engine compartment doesn't necessarily need to be too hot to get the boiling off of liquid. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~