Whitesupraboy2 Posted January 21, 2005 Share Posted January 21, 2005 Does anyone know the CFM of air flow that is made by the engine when idling? Also when at about 6500RPM, does anyone know the CFM of air flow then, for TT or a NA?? any info be great thanks Link to comment Share on other sites More sharing options...
Guest Usmann A Posted January 21, 2005 Share Posted January 21, 2005 I think a search is required. Its been done a few times. I do the following for quick figures, L(displacement)*VE(approxiamte)*RPM*PR/5660 = CFM. CFM=lb/min = CFM*0.76=lb/min but remember to be acccurate, you need to allow for density ratio(the weiught of dyr air etc), temperature difference(intercooling),compressor efficiency and to find out actual VE ,is another matter itself, and is always forever changing. You could use the moreboost.org site, but im going to be finding out VE, and CFM flow with different setups myself on the dyno soon. HTH Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted January 21, 2005 Author Share Posted January 21, 2005 cheers mate, i was hopeing for answer, now gonna have to kick in brain lol where that calculator go .... Link to comment Share on other sites More sharing options...
Guest Usmann A Posted January 21, 2005 Share Posted January 21, 2005 Right Ive sat down ages ago, and if you an actually calculate the exact CFM, and choose your specific target AFR for that specific RPM/load, then you can workout out a rough Duty % figure, and by calculating the cycles you get pulse width. I am going to dig up a exact sheets for you, when I return after my big dinner. Link to comment Share on other sites More sharing options...
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