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Old 10-24-2008, 11:00 AM   #1 (permalink)
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Question about EOCing a manual

Alright, so I've been reading a lot of stuff about engine off coasting, and would like to start doing it in my Tercel. My question is, when you shut it off, do you turn it back on by pop starting it, or by using the starter? And if you pop start it at a high speed, does that do any additional wear to the clutch or anything else in the transmission?

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Old 10-24-2008, 11:14 AM   #2 (permalink)
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Most manual drivers will clutch start the engine, unless they're coasting up to a long stop (red light, train tracks, whatever).

Yes, there will be more wear. Any time you engage the clutch, there's wear. Also, you're straining the drivetrain components in the "other" direction.

Enough wear to be an issue? Depends on the vehicle and the skill of the driver, I suppose. Many have been doing this for years with no adverse effects.

See this thread for more discussion: http://ecomodder.com/forum/showthrea...gine-1141.html
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Old 10-24-2008, 11:14 AM   #3 (permalink)
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When restarting after EOC, I pop the clutch if I'm moving at all. If stopped, the key is the only alternative. When restarting on the fly put the transmission into the gear that you would use to go that speed if you were driving. If it is an inbetween speed go with the higher gear. Also be ready to depress the accelerator.

With a bit of practice the "pop" start can be done with minimal turbulance, thus ensuring minimal wear to associated mechanicals.
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Old 10-24-2008, 11:16 AM   #4 (permalink)
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And one more thought: if you're going to try this, make sure to master the technique away from traffic. Find a deserted road/parking lot to get good at it before beginning to use it around other drivers.
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Old 10-24-2008, 11:31 AM   #5 (permalink)
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Great, thanks for the info!

I've only had to pop start my car when the starter goes out, so I'm used to having to do it while pushing the car fast enough to get it to go in 2nd gear. I guess it'll be easier to smooth it out if I'm trying to start it in a higher gear.

I'll have to test this out next time there's no traffic around, maybe even take a little trip just to practice it.

Thanks!
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Old 10-24-2008, 12:23 PM   #6 (permalink)
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I also recommend bump starting your car, though I have only been doing it for a short while, it does save a significant amount of additional wear on the starter. There is only a marginal amount of wear added to the transmission if you use the highest gear to bump start, I find that any speed above 20 MPH use 5th gear, any slower and you may have to use 4th or even 3rd.
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Old 10-24-2008, 12:41 PM   #7 (permalink)
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Yeah, definitly bump start in a high gear. Its much easier and smoother. Welcome to the site BTW.
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Old 10-24-2008, 06:34 PM   #8 (permalink)
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I've been doing combined EOC and DWL for a couple of months now.
Depending on speed and terrain, I find my self using two different pop restart techniques.
Simple Pop Restart
  1. Foot off throttle.
  2. Key in run position.
  3. Depress clucth pedal.
  4. Select gear.
  5. Release clutch pedal.

Hi-load Pop Restart
Separates loads from clutch engage and engine start.
  1. Foot off throttle.
  2. Key NOT in run position.
  3. Depress clutch pedal.
  4. Select gear.
  5. Fully release clutch pedal.
  6. Wait ~1/8 second (Not strictly necessary. Just don't allow steps 5 & 7 to merge.)
  7. Turn key to run position.

Simple Pop Restart results in the least loss of momentum while performing the resart . But it only works well (little strain on clutch/drive train) at very specific conditions. Using my '94 Escort wagon as an example: Level ground, 5th gear & 32 mph = virtually no strain. Level ground, 5th gear & 35 mph = obvious strain. Level ground, 5th gear & 40 mph = obviously excessive strain.

Hi-load Pop Restart results in sometimes obvious loss of momentum while performing the restart. Seems to work well (very little strain on clutch/drive train) under most any conditions within the normal operational range of the selected gear.

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Last edited by TestDrive; 10-24-2008 at 06:39 PM.. Reason: Added on line of explanation to Hi-load Pop Restart
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