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Old 08-14-2012, 04:03 PM   #141 (permalink)
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A vacuum gauge will give you a LOD equivalent. ~13 psi MAP is about the same as 85 LOD. You'll have to translate if your gauge uses other units.

That's a good target if you're not using lean burn. Others here can advise you on best practices with LB.

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Old 08-14-2012, 04:24 PM   #142 (permalink)
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Lean burn is a different animal that works best by driving with load (DWL) or "target driving": pick a target MPG number on the MPGuino and tweak the throttle to hold maximum lean burn. You should be able to get better MPG at a higher average speed.

I took a ~180 mile trip on the weekend with the Insight with electric assist disabled 99.9% of the time. My target cruise speed was 50 mph (speed limit on the secondary roads I used), and I got ~100 mpg round trip by focusing on throttle control to hold lean burn at >100 mpg on the instant display. It's just not possible to get that MPG at that target speed using P&G.

(It is possible to get ridiculously high numbers -- ~150 mpg -- using P&G in an Insight, but the average speed has to drop into the low 20's to do it.)

FYI, one of the guys responsible for popularizing the pulse & glide technique in the nascent hypermiling online communities (Dan Kroushl) had both a Civic VX and a Prius. He would P&G the Prius quite a bit, but cruised his VX in maximum lean burn.
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Old 08-15-2012, 12:06 PM   #143 (permalink)
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I have the HF trans in the Wagon now. 2000 RPM at 65 MPH.
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Old 08-15-2012, 12:07 PM   #144 (permalink)
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Woo. Did you post a thread on the swap?
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Old 08-15-2012, 12:33 PM   #145 (permalink)
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Quote:
Originally Posted by MetroMPG View Post
Woo. Did you post a thread on the swap?
Not yet, but I will.
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Old 08-15-2012, 05:06 PM   #146 (permalink)
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Quote:
Originally Posted by MetroMPG View Post
FYI, one of the guys responsible for popularizing the pulse & glide technique in the nascent hypermiling online communities (Dan Kroushl) had both a Civic VX and a Prius. He would P&G the Prius quite a bit, but cruised his VX in maximum lean burn.
Since all Prii are automatic, how exactly do you P&G it?
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Old 08-15-2012, 05:13 PM   #147 (permalink)
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It's actually an elegantly simple thing to do in hybrids that work like the Prius:

1) Accelerate to desired speed (using e-assist or not, depending on your goals, but no more than about 41-42 mph)
2) Briefly release the accelerator. This causes the gas engine to shut off (assuming the car is warmed up, etc.) and it will go into regenerative coasting (light deceleration), unless you do the next step...
3) Feather (press) the accelerator so that regeneration stops, but not so much that you engage the electric motor (unless you want to). Magic zone: you are now effectively coasting in "neutral".
4) When you've coasted as slow as you want to go, press the accelerator enough to re-start the gas engine and re-accelerate.

It's been quite a while since I drove a Toyota hybrid, but I got a huge kick out of how easy it is to do many of the P&G/EOC tasks with just the right foot. No ignition keys, kill switches, gear shifting, clutching, bump starting, etc. Elegantly simple & refined.

Definitely recommend trying one sometime just for the experience!

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Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
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Ecodriving test: Manual vs. automatic transmission MPG showdown



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Old 08-15-2012, 09:05 PM   #148 (permalink)
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Well, we've pulled ahead! I thought my last tank would be better, but it was slightly lower than the previous one, so it only brought my 90-day up by .7 mpg.
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Old 08-16-2012, 12:14 AM   #149 (permalink)
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HF trans thread:
http://ecomodder.com/forum/showthrea...gon-22949.html
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Old 08-16-2012, 05:51 AM   #150 (permalink)
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I really hope that someday, lean burn will join my quest for better MPG...

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