Originally Posted by 02sportytex
The high RPM deal only works on an engine with smaller pistons. For instance an 883 running at 4500 rpm will get better gas mileage than a 1200 running 4500. Running low rpms equals better gas mlg unless you are running at 30 mph in 5th gear and pushing so much fuel to get it up and going. running low rpm in normal conditions will equal better fuel economy than running high rpms.
You Guyz miss understood me I think, all of you, not just you Sporty.
I was refering to fuel burn rate during acceleration..
When you settle on a cruise speed and the AFR goes all lean your running as
efficiant as you can be. The problem is how you use the engine to accelerate..
Say wit me boyz..
The super simple version:
Going for power down low on the tac is NOT efficiant.
You are dumping X amount of fuel and pushing up speed with
the climbing torque. New riders often turn the throttle up,,then
need a bit more so they turn a little more and wait for the added
acceleration to happen. All this time riding rich as hell on the fuel
tables and getting little in return..
20 to 50 mph In a given distance/time swinging the tac from 2,500
to 3,500 (staying above lugging of course),,,
with what ever gears you choose burns more fuel.
The throttle must be held open more as In a greater percentage
of total throttle range,,,more fuel.. for a longer duration.
20 to 50 mph with the tac swing at 3,000 to 5,000 happens ALOT
faster with ALOT less throttle twist and ALOT less time/duration
spent with the throttle so open..
I am NOT saying I or you should turn 5 grand in traffic,,follow me ?
You dump/burn LESS fuel for each acceleration between street lights
and such because you are on acceleration throttle position for a
shorter time duration and at a lesser/lower throttle pos.....
I still cruise at the same rpms as we all do...
I go for 5th gear at 55 But I will drop to 4th if I need anything
more than cager crawl acceleration..
Shifting/accelerating with 1,000 rpm's MORE on tap gave me
consistantly more MPG's to the tune of about
10-12% at all speeds and in all conditions.
When you operate the bike especially In traffic It will be more efficiant
in the middle of It's power/torque range and that my friends
is ABOVE 3,500 rpms....
REMEMBER what I say applies ONLY during acceleration NOT cruising along....
Look at the 1200 gear chart and look at the rpm in 4th at 45 mph and then
without a gear change look where the rpm Is when you accelerate to 50 mph.
I see Riders use these throttle positions and gears at 40 mph,,,
Now look again at the same speed range and rate of change and RPM range when you downshift to 3rd.....
Now yer talkin,,thats where my engine want to be,,
Not Grunting my fried chicken eatin ass up faster but
Spinning up with less effort..
Here Endeth The Lesson...
Yeah Yeah I know, I'm an arrogant S.O.B. ain't I