Quote:
Originally Posted by Frank Lee
As far as gear choice and speed, I think you want to be in top gear as often/as long as possible.
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Not really, unless I have this wrong. Rather, you should be as close to the minimum BSFC as possible. That's the best conversion of gas to kinetic energy.
I looked up my gearing and calculated RPMs:
Code:
Gear ratio
MPH 5 10 15 20 25 30 35 40 45 50 55 60
1 3.363 898 1797 2695 3593 4492
2 1.947 1040 1560 2080 2600 3120 3641 4161
3 1.285 1373 1716 2059 2403 2746 3089 3432 3776 4119
4 0.939 1003 1254 1505 1756 2007 2257 2508 2759 3010
5 0.756 808 1010 1212 1414 1616 1817 2019 2221 2423
Final diff ratio 4.021
Tire dia 25.3"
Mitsu has 4G93 engine and mitsubishi F5M22 transmission
If the min FC in the BSFC map is at 2000 rpm at 75% load, like I'm lead to believe, then I should be in 3rd at 30 mph, 4th at 40 mph and 5th at 50 mph, all at 75% load. Aerodynamic drag should be higher at 50 than 30, so mileage should be best at 30, not 50. But maybe I'm "in a hurry".
Unless you mean cruising at a steady throttle and 30 mph. COmpletely different. Then, yes, 5th at 1212 rpm would probably be better FE than 3rd at 2059 rpm. But it would be much worse than P&G above.
Do I have this right? Practically, though, can you really P&G for 12 straight hours, ICE off, on a trip of 600 miles? It begs for a better way.
It's all dangerous and illegal and stuff, but conceptually, I'm thinking of a mod than automates P&G via a on-off button on the steering wheel. Might be ok for lonely country roads.
Quote:
Originally Posted by Frank Lee
As far as "best car" choice, you can look at what the top performers are driving- Civics, Metros, Priuii, and the like. IMHO people who do more metro-area driving can wring more out of hybrids while people who do a lil small town driving/ more open highway cruising are better off without hybrid expense and complexity.
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Interesting, true about hybrids in stop and go.
It's hard to interpret results because I have no idea exactly how and where they are driving. Mostly how.