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Old 01-15-2009, 10:51 PM   #13 (permalink)
Clev
Wannabe greenie
 
Join Date: Aug 2008
Location: Yorba Linda, CA
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The Clunker (retired) - '90 Honda Accord EX sedan
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Quote:
Originally Posted by Christ View Post
I think this has alot to do with the engine size and type, among other considerations. To accurately see how it affects coastdown times, you'd have to AABBAA test it, honestly. It's not by and large a huge difference, but in some cars, there is a difference.

My loose-engined Civic, for instance - I would be able to modulate 3-5 MPH difference at the end of a long coast on the same stretch of flat road, when coasting from the 45mph stop sign to the same curve (really tight curve, have to slow down to like 20 or so) Usually, by the time I hit that curve, I'd be around 30 MPH... but using the throttle with the engine off, I could keep it around 33-35 MPH over that same 1000ft stretch. Of course, engine RPM also has alot to do with it, and I would never take it out of 3rd gear while doing this.
Ah, okay. I think my expectations were too high, and maybe it does make a difference, but not as much difference as I expected.
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