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Being in neutral while moveing

#21
we miss our Saturn, but my daughter walked away while the car wound up on it's roof after a couple of rolls. Got great mileage and fun to drive (manual). I'm now getting familiar with a Chrysler 2.7. Touchy feely engine there.

install a pressure dump and save all that shifting. And stay away from the backs of trucks. Saw a BMW take a six foot ladder that a semi centered nicely but didn't work out well for the car.
 
#23
pressure dump? as in a blow off valve?

And I try to stay away from behind trucks but it can be hard with all that suction pulling me along behind them.

And if I'm in the mood for it I will sometimes turn it off halfway down the block and coast into the driveway. Steering it very difficult but brakes dont seem notably different.

And thats lucky to walk away from a rolling. Knowing me the gallon wine jug I use as a waterbottle for my car would break my neck or something if I do that.
 
#24
Good grief. Don't turn your engine off while moving. What are you trying to prove?

Yes, the steering gets heavy. What if you had to avoid a kid dashing out into the street? As for the brakes, there's enough power assist left for one stop - probably. Pedal feel and travel *will* be different with the engine off. If you think the brakes don't seem notably different, then you're notably not observant.

I really don't understand the point of your exercise. Just drive the car. Don't be cute.
 
#25
blastoff99 said:
Good grief. Don't turn your engine off while moving. What are you trying to prove?

Yes, the steering gets heavy. What if you had to avoid a kid dashing out into the street? As for the brakes, there's enough power assist left for one stop - probably. Pedal feel and travel *will* be different with the engine off. If you think the brakes don't seem notably different, then you're notably not observant.

I really don't understand the point of your exercise. Just drive the car. Don't be cute.
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I'm not trying to prove anything. At most I am having a little fun and challening myself.

As for kids I have few enough objects blocking my view I could see any kid on the block and drive with caution if needed.

Power break systems also hold enough vacuum for several stops in them. And if my car is off why would I need to make more then one stop.... :hmm:
There is also a physical link to the master cylinder to your pedal so even if there was no vacuum left you would still be able to stop.
 
#30
graver555 said:
If your not an extremist and turn the car off why would the steering wheel lock?
And even those who do turn the engine off turn the key back on the the on position to prevent this and have their gauges still work.

Also my wheel does not lock in acc mode which is what it would be in even if you did not return it to the on position.
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I just remember that when I was young and dumb, I owned a van that had no steering wheel lock. I would turn off the engine and coast into my parking space.

Then I got a new car. First time I went into my parking lot, I shut off the engine, and when it was time to turn into my spot, the wheel locked. Fortunately, I managed the stop the car before crashing.
 
#32
^^fair enough.

^There is a difference between hypermilling and enjoying driveing, and being stupid. And honestly people who do stupid things like turning their engine off while driving are still a heck of a lot better then the intoxicated. I cant remember the last time I read about someone dieing from hypermilling. Generally they do the best they can to have superior situational awarness as it is part of driving economy minded which is what they are doing in the first place.

This has gotten alot more argumental then I had predicted.....
 
#34
Hypermiling: inconveniencing or putting other people at risk in order to save a couple bucks on a luxury that costs thousands of dollars regardless. "Challenge" yourself in a way that doesn't affect others. We have had this argument on here before.
 
#35
Your practices have limited benefit, but are potentially very dangerous, and you are sharing a public roadway while doing it. Get a manual shift where (at least in re: to coasting) you don't compromise your ability to make an immediate, evasive maneuver if need be. The stopping the engine thing is just idiotic. Sure, there are hybrid cars in development that utilize a variant of the stop / start engine system, but they still have an engaged drive (the electric motor).

Cut it out before you unwittingly hurt someone.
 
#37
DerHoggz said:
You really aren't saving gas, it is just stupid.
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This statement is false. Depending on vehicles it is more fuel efficient to coast in neutral. If its a newer vehicle that kills the injectors while coasting it is more efficient to leave it in drive and coast your using 0 gas. If its an older vehicle coasting in neutral can show significant gains.
 
#38
graver555 said:
^^fair enough.

^There is a difference between hypermilling and enjoying driveing, and being stupid. And honestly people who do stupid things like turning their engine off while driving are still a heck of a lot better then the intoxicated. I cant remember the last time I read about someone dieing from hypermilling. Generally they do the best they can to have superior situational awarness as it is part of driving economy minded which is what they are doing in the first place.

This has gotten alot more argumental then I had predicted.....
Click to expand...

Just go to ecomodder.com and forget this place as far as this is concerned.
 
#39
blastoff99 said:
Good grief. Don't turn your engine off while moving. What are you trying to prove?

Yes, the steering gets heavy. What if you had to avoid a kid dashing out into the street? As for the brakes, there's enough power assist left for one stop - probably. Pedal feel and travel *will* be different with the engine off. If you think the brakes don't seem notably different, then you're notably not observant.

I really don't understand the point of your exercise. Just drive the car. Don't be cute.
Click to expand...

As I said there's a forum for this type of thing, a few vehicles these days have electric power steering so you can turn the egine off and coast, no the wheel doesn't lock unless you turn the key off all the way. There are guys who mod there cars safely with start stop buttons to avoid this type of thing,


Anyways I'm not saying I do it, but I have don't a few hyper mailing techniques and have had a 20mpg increase.
 
#40
graver555 said:
I know engines should idle that low but I have never actually had a car that did. Closest I have seen is about 900 from my dads big roadmaster.

Could the wheelside of the torque converter act on the crankshaft?
Click to expand...

The wheel side does generate pressure, but not as much as the crank side. This is the reason shutting the key off while in neutral and coasting results in the engine re-starting.

However, if you look at a manual, the idle should be about 650 RPM. Idling much higher than this is hard on the transmission when shifting. If it idles a lot higher, it's usually because of a vacuum leak. If the PCV hose is leaking badly, it would probably idle at about 1500 RPM but it won't experience runaway because the hose is too small.
 

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