Quote:
Originally Posted by Stubby79
If it hasn't been pointed out...if you prevent the gas pedal going down all the way, I doubt your engine will ever be able to hit peak efficiency. In theory, you want to floor it (at least up until just before fuel enrichment kicks in) to get up to speed most efficiently.
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Very good point. And easily done with a manual transmission. Or as BLSTIC pointed out:
Quote:
Originally Posted by BLSTIC
Your best bet is to access the factory PCM and change the limiter settings, as nowadays they automatically close the throttle if you approach the limit slowly and the transition to 'limited' would be smooth and accurate. If you do this, the chances are that you then have access to auto trans tuning too, which is a powerful economy tool
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In other words, if the engine could be set to hit nearly full throttle, right before it enriches, and the transmission set to keep RPM's down, that would be the best efficiency mod as far as all that goes.
But the other point was to limit top speed, although that is perhaps easier to do with pure will power and a cruise control system. For an example, all summer I was traveling once a week to the next town 65 miles away in my Nissan Leaf. On the way there it wasn't bad with the 2,000ft drop, but on the way back I had to limp along at 35mph to make it back up those 2,000ft. I'm just afraid that if I trade my Leaf for something with a longer range I'll be tempted to go much faster. Not that I want to go 35mph everywhere but 55mph seems like a good limit for where I live. Less wear and tear and better fuel mileage.