boost temperatures

[bvillercr]

This is how we keep track of our supercharger efficiencies.  The % are the efficiencies i.e 45%, 65%, 75%.  Also these charts show the different temperatures between 70, 90 and 100 degree ambient temperatures.  This is just the compression of air before any inter-cooler or fuel is added.  What kind of temperatures are you seeing?
    I had to break each page into two parts so you could see the numbers better.  We got the formula from Hugh McGinniss Turbocharging book.

[jl222]

   The ideal temp on the charts are considered 100% efficient at that boost level, in other words you can"t compress air any better than that.

         JL222

[bvillercr]

We found another chart that is more relative to Bonneville.  The pressure is dropped from 14.7 sea level to 12.7 for the altitude adjustment.  The temp. at 30 psi is much higher at altitude than at sea level.  The temp. of the day would be during the morning sense it is only 70 degrees.

[Rex Schimmer]

Your charts certainly are a strong argument for proper sizing of the blower to the application for the most efficient engine/blower setup and also for BIG liquid to air intercoolers! Great info!
Rex

[jl222]

   Rex
     also why centrifugal or turbos with 65-75% efficiency run so much faster than roots blowers "on gas" that are 50% or less,some new designs are getting better though.