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Old 07-15-2014, 10:57 AM   #31 (permalink)
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Quote:
Originally Posted by serialk11r View Post
There's another problem with the restarts, which is that running the engine at low duty cycle means the cats will cool off considerably.
I believe someone on here had codes for that. They had to drive the car without EOC for a while to get the cats to light off properly and burn off everything in them.

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Old 07-16-2014, 02:43 AM   #32 (permalink)
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Quote:
Originally Posted by Miller88 View Post
I believe someone on here had codes for that. They had to drive the car without EOC for a while to get the cats to light off properly and burn off everything in them.
Some good highway miles does a lot of good if you do it every few months or so. I like having the need to drive the couple hours to Dallas a few times per year for this reason. This is also why cars which are high mileage but mostly highway driven are a steal.
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Old 07-16-2014, 03:06 PM   #33 (permalink)
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Originally Posted by Old Mechanic View Post
People used to crank cars by hand. Look at it backwards. Try driving your car with the starter motor. It won't work because the starter motor won't produce enough power.
You can drive a short distance with the starter motor if you drive an older car or have disabled your clutch interlock switch on a newer car. I once drove with the starter motor in my 68 VW Beetle when it died in the middle of an intersection. When the motor died, I put it into 2nd gear and cranked the starter to drive out of the intersection and off to the side of the road. I've also driven on the starter for short distances in a 76 Rabbit diesel, a 79 Subaru Brat, and my 68 Beetle at various times when they had experienced clutch failures. I had to start their motors with the clutch engaged in 1st or 2nd gear (depending on the slope) and then rev match to change gears without the clutch in order to drive them to the repair shop, or in the case of the Beetle, I drove it for several days like this before getting it to the shop. A 1960's book about driving tips that I once read talked about using the starter motor to move your car if the engine died during a water crossing.

On the Aerocivic, when I finally had the transmission replaced at 510,000 miles when the 5th gear bearings wore out, it still had about 1/4 of the clutch lining still left despite over 200,000 miles worth of bump starts.
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Old 07-16-2014, 04:39 PM   #34 (permalink)
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Originally Posted by Varn View Post
If coasting is so dang efficient why don't manufacturers put it into automotive cruise controls . Have them de=clutch and coast for 5 seconds and restart. Is it beyond the capabilities of cars which use radar to cc.
You mean something like Audi's new car:
http://ecomodder.com/forum/showthrea...udi-29464.html

Most drivers seem to find driving in neutral with the engine off a bit disconcerting. I believe this is a risk that most auto manufacturers aren't comfortable making.
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Old 07-16-2014, 05:03 PM   #35 (permalink)
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I EOC P&G and bumpstart my KIA all the time and have zero issues. The clutch still works.
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Old 07-16-2014, 05:14 PM   #36 (permalink)
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It's how you use the clutch, not why you use the clutch. Bump starting or regular shifting, the clutch don't care. What matters is you: you're either hard on your clutch or not.

I thrashed my Subaru for over 165k before hypermiling it for over 41k. Lots of EOC. I finally parked it at just over 207k because the clutch was too far gone to depend on and too much money to sink into the car. In 25 years of driving that's the only clutch I've worn out. The only one I've had to replace is one the rear main seal leaked oil all over.

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Quote:
Originally Posted by sheepdog44 View Post
Transmission type Efficiency
Manual neutral engine off.100% @MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%

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