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Message: [QUOTE="V-Ref, post: 98179, member: 660"] I'll try! I like references for stuff....Hope this helps. Reference-[URL="http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech103.html"]Garrett Turbotech103[/URL] "Many people use Volumetric Flow Rate (expressed in cubic feet per minute, CFM or ft3/min) instead of mass flow rate. Volumetric flow rate can be converted to mass flow by multiplying by the air density. Air density at sea level is 0.076lb/ft3" Since you want to convert the other way, just inverse the equation- Ex1: 95 lb/min [SIZE="4"]/[/SIZE] .076= 1250 cfm Ex2: 1250 cfm [SIZE="4"]x[/SIZE] .076 = 95 lb/min Reference[URL="http://www.asia.donaldson.com/en/exhaust/support/datalibrary/1053747.pdf"]-Donaldson Filter page 7[/URL] [SIZE="6"]([/SIZE]Exhaust Temp. (°F) + 460 / 540 [SIZE="6"]) [/SIZE] [SIZE="5"]x [/SIZE] Intake Airflow(CFM) = Exhaust Flow Can't help here. I'd be pretty critical of the credentials of somebody that says they were to ensure you weren't getting fact not fiction....as you're asking some deep PhD level stuff above... There will be a small addition to the exhaust mass that isn't accounted for above because of the addition of fuel. The link below is speaking to gassers. [URL="http://www.eng-tips.com/viewthread.cfm?qid=104735"]http://www.eng-tips.com/viewthread.cfm?qid=104735[/URL] If that chit right there don't make your brain hurt...well...umm...:wtf: You'd need to know turbo RPM to accurately plot the performance of a compressor wheel. Besides Charles/Gearhead/Tarm and other smart folks posts on some the of threads here and elsewhere, this link below is one of the best references I've ran across in learning how to read turbine maps. [URL="http://www.dieseltruckresource.com/dev/do-turbine-maps-tell-us-turbo-t168543.html"]http://www.dieseltruckresource.com/dev/do-turbine-maps-tell-us-turbo-t168543.html[/URL] I'd PDF these links...as I've already lost a couple good links due to forums going Tango Uniform. I've got a couple book on turbocharging/supercharging too....but nobody reads those anymore :lookaround: [/QUOTE]