Welcome to the IHoP

[ANeonRider 3]

Yep, zero, unless it is reving very low (>1500rpm in my Sentra's case). It uses the engine's momentum to engine brake while going down the hill, consuming no fuel. If more people knew this, then we'd have less brake failures on steep grades.

[ANeonRider 3]

Brought to you by the local area hack job pot head. It's a head from a turbo sprint. Beautiful work eh?

[vladd 26]

i always use the engine to coast anyway, because the stratus's brakes fade real quick, but i never knew the fuel consumption was zero, still having a hard time accepting it.

[vladd 26]

dremel?

[vladd 26]

i want to build the ZDT3.5s but my room next year is going to be small. I think i'll build them anyway, i can deal with the issues until i move in to my own place.

[vladd 26]

ohh i just noticed the sig.... i wonder if johnecon realizes how long it'll take him to erase 2k posts of me talking about how he loves the taste of my taint?

[audio-neon 34]

Yep, zero, unless it is reving very low (>1500rpm in my Sentra's case). It uses the engine's momentum to engine brake while going down the hill, consuming no fuel. If more people knew this, then we'd have less brake failures on steep grades.

I'm gonna have to double check this sometime this week. I'll ask the faja about it seeing as it's what he does for a living and than I'll see if I can borrow his chrysler scan tool and measure the injector load when going down a hill.

[ANeonRider 3]

i always use the engine to coast anyway, because the stratus's brakes fade real quick, but i never knew the fuel consumption was zero, still having a hard time accepting it.

Here:

http://forums.neons.org/viewtopic.php?t=264253

Same applies for your Stratus, if its a 5 speed. Different if you are automatic.

[audio-neon 34]

I'm also considering:

http://www.musicdirect.com/product/81212

http://www.musicdirect.com/product/80762

http://www.musicdirect.com/product/80839

http://www.musicdirect.com/product/73926

Anyone have any input on any of these tables?

[ANeonRider 3]

DECELERATION MODE

This is a CLOSED LOOP mode. During deceleration the following inputs are received by the PCM:

* A/C status

* Battery voltage

* Inlet/Intake air temperature

* Engine coolant temperature

* Crankshaft Position

* Exhaust gas oxygen content

* Knock sensor

* Manifold absolute pressure

* Throttle position sensor

* IAC motor control changes in response to MAP sensor feedback

The PCM may receive a closed throttle input from the throttle position sensor (TPS) when it senses an abrupt decrease in manifold pressure. This indicates a hard deceleration (open loop). In response, the PCM may momentarily turn off the injectors. This helps improve fuel economy, emissions and engine braking.

Straight from the Neon FSM.

[vladd 26]

good read, now i know.

btw the stratus is auto, but i am lazy. current brake pads have lasted two years and still had plenty of life left on them last time i checked.

[mrray13 30]

there is still some fuel going in...the motor is still running. it simply cannot run without fuel. maybe it's a minute amount, but it's still fuel.

also, i read somewhere that today's engines are more fuel efficient starting then idling(if more then 10 seconds). any truth to that? is it worth shutting the truck off at stoplights?

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[audio-neon 34]

there is still some fuel going in...the motor is still running. it simply cannot run without fuel. maybe it's a minute amount, but it's still fuel.

also, i read somewhere that today's engines are more fuel efficient starting then idling(if more then 10 seconds). any truth to that? is it worth shutting the truck off at stoplights?

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

I'll see what I can do to test this. I will have to make a drive to vermont and play with some mountains, but I have all the equipment needed to test this out.

And yes, engines are more efficient starting than idling. I believe it's 20 seconds though. It's a minute difference for all respects, it would probably add up to 10$ in a year of savings.

[ANeonRider 3]

And starters are more expensive than $10.

No fuel is needed to keep momentum until the revs are around idle. The engine will continue to move on its own without fuel.

[todd.brust 29]

What's up guys? I'm finally moved into the new place and pretty well situated.

I have a big bedroom now and have plenty of room to enjoy the DQ-10s. Working on getting my brahma into a PR enclosure to use at home!

[todd.brust 29]

chat anyone?

[audio-neon 34]

chat doesn't work, at work.

[mrray13 30]

And starters are more expensive than $10.

No fuel is needed to keep momentum until the revs are around idle. The engine will continue to move on its own without fuel.

ok, going by this thought process, when coasting (in neutral) the engine is simply spinning by momentum, until i press the gas and then it "restarts"? i can't believe this. teh rpms stay a constant amount, around 750, if it was strictly momentum they would go down. they would have too due to drag, both internally and parasitic (accessory drive belts).you simply can't get around those two objects and they will defeat momentum. so there as to be some fuel going into the engine to keep rpms at the set idle.

and in old cars especially. i mean there was an idle screw on that carb for a reason, no?

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[mrray13 30]

and i'll have to catch up on this tomorrow evening. i've got to be at work at 5:30am, till god knows when.

btw, tested and achived my gold belt tonight!! on my way, next up, orange.

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[vladd 26]

next year:

kent vs chuck norris!

[audio-neon 34]

And starters are more expensive than $10.

No fuel is needed to keep momentum until the revs are around idle. The engine will continue to move on its own without fuel.

ok, going by this thought process, when coasting (in neutral) the engine is simply spinning by momentum, until i press the gas and then it "restarts"? i can't believe this. teh rpms stay a constant amount, around 750, if it was strictly momentum they would go down. they would have too due to drag, both internally and parasitic (accessory drive belts).you simply can't get around those two objects and they will defeat momentum. so there as to be some fuel going into the engine to keep rpms at the set idle.

and in old cars especially. i mean there was an idle screw on that carb for a reason, no?

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

We were talking about engine braking. Like going down a hill in 3rd gear at 3k rpm. The injector load would be @ 0%. The gravitational constant, minus friction, minus parasitic loss etc, the engine would be kept at an rpm ABOVE idle due to gravity and momentum. Once the rpm's dip down close to idle, the injectors would start the combustion process again, keeping the engine at/slightly above idle.

[vladd 26]

so bored....waiting while mini-g waxes her box.

part of me wants to bust in with her digicam that's sitting next to me

[todd.brust 29]

so bored....waiting while mini-g waxes her box.

part of me wants to bust in with her digicam that's sitting next to me

I say why not?

[mrray13 30]

next year:

kent vs chuck norris!

i'd win. i'm bringing a gun..lol...

audio-neon...see what happens when one jumps into the middle of a conversation without reading all of it? i flat put my foot in my mouth and will respectfully back out of the conversation now, lol. sorry.

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[mrray13 30]

so bored....waiting while mini-g waxes her box.

part of me wants to bust in with her digicam that's sitting next to me

I say why not?

x2!

NOW!

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee