|
If we're talking about NA engines, you're best off with a 3 speed, assuming the same rollout.
Skip shifting 1-3-5 has the effect of increasing the average load on the engine for reduced pumping losses, remembering that BSFC is over 3k rpm for most engines anyway. I skip shift my NA's unless towing/ hill/ need the acceleration.
My best tank ever was recorded skip shifting, if nothing else it reduces clutch and shift linkage wear.
The term 'overdrive' is meaningless. Various cars in the 90's had double overdrive five speeds. A lot of cars today have triple over drive.
Less gears= less friction
Don't be fooled by today's 10 speed autos. They're more about the driver not noticing when the computer shifts the wrong way and less about economy.
|