Just curious to hear people's thoughts on this one - is there, for our 3A-C's, or for any engine for that matter, a gas mileage 'sweet spot rpm' that will consistently yield the best gas mileage in steady driving? I've read all the hints and stuff re getting good gas mileage, based on driving habits, type of gas, engine mods, etc., and I don't recall any mention of this.
It occured to me that each engine, based on its design, should perform best, mileage-wise, at a certain rpm. I.e., if on a longish trip, or stretch of road, for mileage purposes only, other things aside for now, is it best to keep rpms at, say 2000, 2500, 3000, or is it just best to keep rpms as low as possible without lugging the engine?
Maybe I'm out to lunch on this, but interested in everyone's comments, ideas, etc., looking at the 3A-C from a gas mileage point of view, assuming all other things to be equal. This assumes a stock engine, as obviously any mods will change the picture somewhat.
Wayne
Yet another gas mileage thread...
A certain Swedish company recommends shifting by 3000 and cruising no higher than 2500 in gas engines. Doing that versus my norm will yield improvement.
RIP 10-07- 1984 Toyota Tercel SR5 4wd Wagen 6 speed
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
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Re: Yet another gas mileage thread...
I think that's probably the one. Engines do have a specific RPM (usually around the torque peak) where they make the most power per unit of fuel, but I think you'll see lower fuel consumption at lower RPM. The only way to know for sure is to do your own testing.waynehoc wrote:or is it just best to keep rpms as low as possible without lugging the engine?
Ever wonder why 55 is highlighted in the 83/4? 55mph= roughly 2500RPM. Probably something to that eh?
Aerodynamically, most cars are most efficient around 55mph. So, my guess would be that back in the early 80's, seeing as speed limits were darn low back then (55 in some places) they tuned the RPM sweet-spot to be near that speed?
Random theory.
Aerodynamically, most cars are most efficient around 55mph. So, my guess would be that back in the early 80's, seeing as speed limits were darn low back then (55 in some places) they tuned the RPM sweet-spot to be near that speed?
Random theory.
RIP 10-07- 1984 Toyota Tercel SR5 4wd Wagen 6 speed
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
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- Joined: Thu Apr 01, 2004 11:54 pm
- Location: New York State
I know that, but the point that it may have been tuned for optimal RPM at that speed still stands.
RIP 10-07- 1984 Toyota Tercel SR5 4wd Wagen 6 speed
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew