Jon89le Posted November 20, 2003 Report Share Posted November 20, 2003 Im trying to pick a right turbo for the upgrade i want to do but im missing some information. Im reading through this book and they are using a certain percentage for Volumetric efficiency and i cant seem to figure out how to get that number. I know its less than 1 but what else is there? You'll need to excuse my incompetence, im knew to this technical turbo thing Thanks Quote Link to comment Share on other sites More sharing options...
brian89gp Posted November 20, 2003 Report Share Posted November 20, 2003 I am pretty sure that a boosted engine will go above 100% Quote Link to comment Share on other sites More sharing options...
Jon89le Posted November 20, 2003 Author Report Share Posted November 20, 2003 No no, naturally aspirated.... Quote Link to comment Share on other sites More sharing options...
SleeperRed90TGp Posted November 21, 2003 Report Share Posted November 21, 2003 Here's my take on V/E. V/E starts out with what your engine will flow on paper. Lets say with x bore and stroke your engine will flow 40# at 6k rpm on paper. Well your engine isn't a piece of paper. I'ts got more vairable than you can shake a stick at. So V/E % takes these vairables into account. Ie, inlet restrictions, cam, intercooler restrictions, manifold and head restrictions, bends in hoses, throttle body and so on. When taking all these into account your V/E % will be less than 100%.(Dont know where the one came from unles they meant 100%) Common V/E's are from 75% to 90% with the norm used for caculations at about 85%. Search around. There was just a thread on turbos under Begging for speed. a few days ago. Hope this help's you out. Jud Quote Link to comment Share on other sites More sharing options...
Jon89le Posted November 21, 2003 Author Report Share Posted November 21, 2003 Great. Thanks man. Yea, the book goes by decimals, not percentages. Same thing tho. Il have to check that thread out. This turbo thing is harder than i thought Quote Link to comment Share on other sites More sharing options...
Chris A Posted November 22, 2003 Report Share Posted November 22, 2003 Great. Thanks man. Yea, the book goes by decimals, not percentages. Same thing tho. Il have to check that thread out. This turbo thing is harder than i thought Keep thinking because its very involved. Quote Link to comment Share on other sites More sharing options...
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