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A1337STI · 2006-05-31, 08:37 AM

does the turbo's efficiency change if its compressing cold air or hot air ?

And yes, assuming 100% IC efficiency that makes perfect sense. I've read on the Interweb that IC are usually 95% efficient though.

eeeerr wait. Given PV=nRT , if you took 1 liter of air at 2 psi and pulled 100 F out of it, or pulled 130 F. you'll get a larger pressure drop with the more heat you pull out of it (same number of air molecules in a given space) yes i'm using a formula for a contained space, and not flowing air , but i belive its applicable (qualitatively)

2006-05-31, 08:37 AM	#7
A1337STI EJ205 Join Date: Jan 2006 Location: Reno, NV Posts: 1,840 Car: Impreza and an Impreza Class: AS / CRS PerfStock "pedal on the right"	does the turbo's efficiency change if its compressing cold air or hot air ? And yes, assuming 100% IC efficiency that makes perfect sense. I've read on the Interweb that IC are usually 95% efficient though. eeeerr wait. Given PV=nRT , if you took 1 liter of air at 2 psi and pulled 100 F out of it, or pulled 130 F. you'll get a larger pressure drop with the more heat you pull out of it (same number of air molecules in a given space) yes i'm using a formula for a contained space, and not flowing air , but i belive its applicable (qualitatively) __________________ Fighting uphill battles, one bullet at a time! Last edited by A1337STI; 2006-05-31 at 08:47 AM. Reason: i can't spell