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Old 07-27-2006, 01:25 PM   #1
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Coasting Techniques

Just started using some of the driving techniques discussed here and had a question about coasting duration. Here in MA the highways tend to be mostly rolling which seems perfect for coasting. So far I've just been doing engine on coasting but wanted to experiment with engine off. I've timed most of the coasting sections and at ~65mph they take ~30s-1min to ride down. What is the minimum amount of coast time that it makes sense to cut the engine for? Any suggestions greatly appreciated.

Sean
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Old 07-27-2006, 01:30 PM   #2
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I'll cut the engine if I think I can coast more than 5-10 seconds, you also notice that when you start codfishing you learn to stretch your coasts and DWL a bit better.

Since you drive an si it must be stick so there's rly no issue with lots of coasting since you can just bumpstart it.
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Old 07-27-2006, 02:59 PM   #3
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I just realized the area I'm currently inhabiting is perfect for coasting. Coming back from the grocery store I can drive uphill for a couple miles, then take a right, kill the engine, and coast another couple miles at 40-45mph compared to keeping the engine on and trying to putt around in 4th at 35mph. I guess transmission losses are significant...
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I think if i could get that type of FE i would have no problem driving a dildo shaped car.
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Old 07-27-2006, 03:02 PM   #4
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Engine braking does cause quite a bit of friction with only the same benefit as codfishing! Woohoo.

Other tips:

Overinflate tyres
Improve aerodynamics
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Old 07-27-2006, 03:11 PM   #5
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I used to bump up tire inflation to ~40-50psi on my truck, but now that I only use it for in town trips every few days, so I don't think the 50cents per fill is worthwhile because it drops down to ~30-35psi within ~32-48 hours anyway.

What's codfishing?
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I think if i could get that type of FE i would have no problem driving a dildo shaped car.
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Old 07-27-2006, 03:13 PM   #6
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FAQ: http://www.gassavers.org/showthread.php?t=1088

Anyway, damn, you loose lots of air, I can go more than a month before losing a few psi and my air is free, but it does greatly help with the coasting.
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Old 07-27-2006, 03:34 PM   #7
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I see. Thanks for the link!
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I think if i could get that type of FE i would have no problem driving a dildo shaped car.
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Old 07-27-2006, 03:36 PM   #8
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I love that link, I need to work on the archives though, grr me.
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Old 07-27-2006, 04:40 PM   #9
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Quote:
Originally Posted by omgwtfbyobbq
I used to bump up tire inflation to ~40-50psi on my truck, but now that I only use it for in town trips every few days, so I don't think the 50cents per fill is worthwhile because it drops down to ~30-35psi within ~32-48 hours anyway.

What's codfishing?
You can get a 12V compressor at Sears for ~$20. Well worth the investment!
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Old 07-27-2006, 05:04 PM   #10
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They're that cheap? I'm guessing the drop in battery charge is worth the decrease in RR.
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