Wed Mar 13, 2013 5:56 pm by Leximu
from my life working on engines, and such..... YEARS of this infact. I can say without a doubt, regardless of what one wishes to think. Turbos add fuel economy( omg big shocker ). Now do we wish to speak of what size ? or if your a city driver ? if your a city driver, boot your turbo idea out the window, if your on fast carriage ways, then a turbo for you would be more efficent.. as what a turbo does ? isn't ever really intergrated for anyone, yea drives more air in the engine.. coolio. yep. That is the main answers you get, but lets inspect further shall we ? Since we know the measure of fuel/air is a important ratio, we need to know WHY it is.. a turbo increases your pressure from a vaccume, which is always less than the outside pressure which is 30hg I think ? which is ALWAYS acting on the throttle..essenstially when you OPEN your throttle up, you have allowed the pressure to rush in, by the atmosphere itself. Now its fine and dandy to have 30hg pushing in, but that only allows you to run a decently lean mixture to get your fuel to burn right.. lets step this further, small turbo, spools at 2000 rpms provides 6-7 boost not even a bar it is way below that at this point. Now you might ask, what the hell is 6-7 ? It is what is added to your atmosphereic it puts in 37 insead of 30.. what does THIS mean ? It means you can run a leaner fuel mixture than your current which in theory provides better fuel economy..and since I know a small turbo hardly requires spool up, or lag.. well. You've just gained some fuel economy. Now lets look at cars that ran away with this idea as a real life example, the chevy cruze has a 1.3L with a turbo producing 120-130 hp ( not sure cause I don't feel like checking ) That is quite a bit being as those engines N/A would NEVER produce that much unless heavily modified to intake that much more air.. they also get quite good milage due to this... the only problems with turbos not adding fuel economy is heavy city drive ( no spooling to even 2,200 rpms ) or a engine that can't spool its turbo.. such as a 1.3 with a huge turbo that produces 3.2 bar ( you might have a problem unless you have a wankel hehe. )