maXbimmer Forums - View Single Post - Help me make heads and tails of turbo selection/compressor maps

everlast · 03-20-2009, 10:26 AM

Try this out:

http://www.not2fast.com/turbo/glossary/turbo_calc.shtml

Remember that calculations and math will only approximate things; experience is the only true measure. I'm sure there are guys running different turbos on the S52 that have posted numbers. Ask the Google.

Edit - where did you get this info: ".97 volumetric efficiency, which is pretty conservative"? Race motors can go above 1 at the right RPM range, but most street motors don't approach 1 from what I understand.

03-20-2009, 10:26 AM	#21
everlast if I lived . I would be ~ Join Date: Mar 2004 Location: Ottawa Posts: 5,800 Car: e30 with e91 beater	Try this out: http://www.not2fast.com/turbo/glossary/turbo_calc.shtml Remember that calculations and math will only approximate things; experience is the only true measure. I'm sure there are guys running different turbos on the S52 that have posted numbers. Ask the Google. Edit - where did you get this info: ".97 volumetric efficiency, which is pretty conservative"? Race motors can go above 1 at the right RPM range, but most street motors don't approach 1 from what I understand. __________________