HardLuck Case of the Year
Join Date: Sep 2006
Location: Catonsville, MD
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"Boost" is the internal pressure of the intake air above ambient (14.7psi or 1bar). If your boost gauge reads 20psi (for simplicity), there is 20psi of positive air pressure relative to outside...but there is 34.7psi actually in there...as per a perfect vacuum.
A turbo engine produces boost by the exhaust gasses passing across an impeller, causing it to spin. This then turns the compressor wheel, which sucks in air and pressurizes it. So...that 14.7psi of ambient pressure is now compounding causing more air for you to throw fuel at, making more power.
-White 2000 F-350 PSD CrewCab/SRW/LongBed/4x4/6spd Manual
/HUGE Powerstroke.Org Vinals!
Favorite Mods: Baby-seat mod/Girlfriend delete/6pos on Xtreme!
Repairs since bought: both batteries/alternator/3 transmissions/4 clutches/entire front axle/new steering stabilizer/power steering pump
Still broken: cracked windshield/all glowplugs/glowplug relay/4WD still out/trailer harness no power
Current Best: email@example.comMPH (Est.7800lbs)