[s-cars] Stock boost levels?

[FvAMI at aol.com]

In a message dated 6/9/04 9:52:13 PM Pacific Daylight Time, 
calvinlc at earthlink.net writes:


> When driving
> at 6k feet here in the South Denver Metro area, I normally see between 20
> and 21 psig with a stock chip at altitude.

In your case you are ready "gauge pressure" ... which uses Atmospheric 
pressure as its reference - so your "real" boost pressure is 

PSI = 21(reading gauge) * (Your Atmospheric Pressure/Sea Level Pressure)

For all you folks with the digital stock gauge - if you have a 3.0 bar sensor 
the absolute reading needs to be multiplied by the following to get the 
approximate value

Absolute PSI = reading * 3.0/2.5

Generally - absolute pressure is the most interesting number - Gauge has it 
benefits to determine pressure ratios for the turbo - but in terms of estimated 
"power" absolute would be the number of interest.

Best regards,
Feico van der Laan