Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

HeadlessNorseman · 10-27-2009, 04:55 PM

Hey...ive just got some simple questions. Basically...regarding starting in first gear vs 2nd gear

Is it more efficient to use 1st gear for a minimum of time, and short shift(1800 rpm) into 2nd? or drag first gear out a little longer and shift to 3rd?

or...Is starting in 2nd better, because of the taller ratio? but with more load on the engine it may not be worth it?

and finally...is there a "minimum" rpm at where you will be using less fuel? for hypothetical example...if i shift to 5th at 25 mpg, the engine chugs a little bit around 900 rpms. Or if i stay in 4th at 25mph...it runs smoother but at 1200 rpms. Which version is better?

10-27-2009, 04:55 PM	#1 (permalink)
HeadlessNorseman EcoModding Lurker Join Date: Oct 2009 Location: central NJ Posts: 47 Grocery getter - '99 mazda protege DX Last 3: 38.1 mpg (US) CRX Otterbox - '91 Honda CRX HF Last 3: 51.07 mpg (US) Thanks: 4 Thanked 2 Times in 2 Posts	questions on manual driving Hey...ive just got some simple questions. Basically...regarding starting in first gear vs 2nd gear Is it more efficient to use 1st gear for a minimum of time, and short shift(1800 rpm) into 2nd? or drag first gear out a little longer and shift to 3rd? or...Is starting in 2nd better, because of the taller ratio? but with more load on the engine it may not be worth it? and finally...is there a "minimum" rpm at where you will be using less fuel? for hypothetical example...if i shift to 5th at 25 mpg, the engine chugs a little bit around 900 rpms. Or if i stay in 4th at 25mph...it runs smoother but at 1200 rpms. Which version is better?