Originally Posted by LudeRage
It makes sense that more power would mean worse gas mileage but if you think about it, the bolt-ons are sucking more air into the engine, but without any modifications increasing fuel pressure, will your car even use more fuel? Just a thought...
you have air fuel ratio, your emissions system works to keep a consistant ratio.... thats what the sensors etc are for...
you would rather lose gas mileage than have too much air.... too much air means you are burning lean and it wont be long before stuff starts to crack and cook inside your engine.