high mph then glide

[bfg9000d]

Has anybody try like for example. Your cruising along you hit lets say 70 mph. Then glide for as long as you can till you hit like lets say 45 mph then accelerate back up to 65 mph or 70 mph then glide some more. This would I guess induce less time on the pedal. The only time you would be on the pedal would be to accelerate back up. I know on some good flat surfaces you can glide for quite a while. If at high enough speeds. I guess sort of in spurts I wonder if this would be effective anybody with scanguage to find out. It be sorta like what you do on hills. Except doing it all the time.

[LxMike]

it's caleld pulse and glide. well known and used by hypermilers.


Checdk ou the general forum and there are 2 threads there that you should check out. have all kindfs of tips and discuss mods.

[Rick Rae]

Yep, it's called "pulse and glide" (or "burn and glide" by some, if you hit the gas really hard). It's a technique that goes way back -- I remember a Popular Mechanics or similar from my childhood with an article about a test vehicle that got something like 1,000 miles per gallon by using a tiny engine and doing pulse and glide at very low speeds.

Search the forums for "pulse and glide", "burn and glide", and/or "P&G" and you'll find lots of useful information on the technique.

Pat yourself on the back for thinking of it independently.

Rick

P.S. Haha, good going Mike, you hit your "Save" button three minutes faster than I did!

[bfg9000d]

well so far what I have read on this forum talks about doing such effect on hills and other surface slope terrain. Not on flats or maybe I have overread it if I'm wrong.

[cfg83]

bfg9000d -

Originally Posted by bfg9000d

well so far what I have read on this forum talks about doing such effect on hills and other surface slope terrain. Not on flats or maybe I have overread it if I'm wrong.

Hilly terrain is definitely where the current P&G discussion is centered. I know that P&G has been my biggest contributor to FE :

Pulse and Glide Baby!!!! 10-19-2006
http://www.gassavers.org/showpost.ph...postcount=1146

I think that once you have mastered P&G for your route, aerodynamic mods become more important to extend the gliiiiiiiiiiiiiiiiiiiiiiiiiiiide.

CarloSW2

[Hockey4mnhs]

we do it on flats and anywere we can get an effective glide. we also turn our engines off to get that extra little edge.

[Rick Rae]

Originally Posted by Hockey4mnhs

we also turn our engines off to get that extra little edge.

Though not those of us with typical automatic transmissions, as that tends to fry them.

As CarloSW2 said, "current." Search (either here specifically, or Google in general) is your friend.

Rick

[n0rt0npr0]

Rick,
Maybe only in the 2000 years and up range.
My 89 celeb, 93 prizm, 96 monte, 97 cutlass all do very very well with EOC'ing
I drove a 1999 dakota RT and a 2001 olds intrigue that didn't seem to like EOC very much, so for the newer stuff maybe its bad...
~Will

Originally Posted by Rick Rae

Though not those of us with typical automatic transmissions, as that tends to fry them.

As CarloSW2 said, "current." Search (either here specifically, or Google in general) is your friend.

Rick

[Rick Rae]

Originally Posted by n0rt0npr0

Maybe only in the 2000 years and up range.
My 89 celeb, 93 prizm, 96 monte, 97 cutlass all do very very well with EOC'ing

I did say "typical."

I'm not a transmission guy by any stretch, but according to other GasSavers older transmissions had a different pumping system that didn't rely on engine drive for lubricant circulation and could safely EOC. Saturns (at least some models) are fine with it as well.

As I understand it though, the majority of vehicles these days would be at risk. Surprisingly, the manual for my VW specifically forbids it:

Coasting downhill with the transmission in Neutral and the engine not operating will result in damage to the Automatic transmission.

You suppose they've had some bad experiences with hypermilers?

The post that mentioned it said "we" EOC, which could be misinterpreted to mean all hypermilers do. I'd rather see this issue raised so newcomers will either err on the side of caution or research whether it's safe for their particular vehicles, than for them to not realize there's a risk and potentially do damage to their transmissions.

Out of curiosity, what do the manuals for the four vehicles you listed say about flat towing?

Rick

[n0rt0npr0]

Rick,

Out of curiosity, what do the manuals for the four vehicles you listed say about flat towing?

The manual states no faster than 35mph and for no longer than 50 miles.