Thread: shift points
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Old 01-01-2011, 01:23 PM   #11 (permalink)
Master EcoModder
Join Date: May 2009
Location: New Jersey
Posts: 389

2003 Ninja EX250 - '03 Kawasaki Ninja EX250
90 day: 78.57 mpg (US)

Saturn - '99 Saturn SL1 Base
90 day: 47.27 mpg (US)
Thanks: 25
Thanked 58 Times in 37 Posts
In my saturn Sl1, i shift between 2000-2300, because thats where the BSFC curve peaks. I have a vacuum gauge installed and accelerate at approximately 2-4 mmHg vacuum (which equals to about 75% load). I've seen a noticeable improvement by doing this.

As others have said, the object is to keep your motor within its most efficient operating range when you need to accelerate. With most engines, the most efficient point is around 75% load and at the rpm range where peak torque is produced. Once you reach cruising speed, you should be in the highest gear. If you want to P&G, you should be in that operating range explained above for the pulse cycle.... and gear will vary depending on your speed.

Doing my part to reduce dependence on OIL
Doing my part to reduce congestion
And enjoying it!

If you have to use your brakes, you are driving too fast!

My 101.5 MPG 2003 Kawasaki Ninja 250

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