Which technique gives better mileage?
Car is 1995 Toyota Corolla, 1.6 l auto, in good condition. Starting gently from a stop, the car shifts up to top gear rather quickly, about 20 mph. I need to reach my normal cruising speed of 51 mph, torque convertor is locked up at that point, and I am in no hurry to go anywhere.
Which would yield better gas mileage ?: A. from top gear, at about 20 mph, accelerate very slowly, just enough to keep the speedometer rising until I reach my cruising speed. Sometimes this may take up to a minute. Watch vacuum gauge and keep vacuum as high as possible, usually above 5 inches. B. from top gear, at about 20 mph, accelerate moderately hard, without letting the trans downshift, until I reach cruising speed. Obviously this will happen quicker than one minuet as in scenario A. Watch vacuum gauge, but under this technique the gauge would go to zero. |
I'd expect B to. Harder acceleration is less acceleration.
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I agree - B is better. BSFC wins.
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You should do best in an auto by acelerating as fast as possible without delaying transmission upshifts. This gives you the highest practical load, which in turn gives you best BSFC. If you can't stay in top gear (converter locked) then pulse (engine on) and glide. No engine off when moving in an auto, or you could hurt the transmission.
regards Mech |
My guess is also B, brisk acceleration.
I recently played on the back roads, taking the engine to the end of the redline, and I got one of my best mpg scores. Of course, I wasn't touching the brakes for anything, but instead coasted. It didn't seem to affect mpg as much as I thought it would. |
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I would stop just short of red line though :) |
I also would go with B in my auto i seem to get my best mpgs at 70-80% engine load
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I normally accelerate at 85% load and shift at 3000rpm. I'll cruise at around 1500rpm. The V-Tech kicks in at 6000rpm and the maximum rpm is 7500. I was just playing since I have never seen what my car is capable of. No sense driving a sporty car if you don't have fun with it every now and then. :D |
Mcgiiver -
This would have made a great poll : Quote:
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