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Old 07-31-2014, 01:36 PM   #5 (permalink)
California98Civic
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,297

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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Clearance, overlap, emissions

Quote:
Originally Posted by Old Mechanic View Post
I always set them to max specs, since they will wear to smaller clearance.
The greater clearance you recommend (within spec) should reduce intake/exhaust overlap and therefore improve my emissions. It should also reduce unburnt fuel in the CAT. It will reduce fuel efficiency a little, though, correct? I'll lose scavenging and gain pumping losses, correct?

Here is some reading I am doing that gives me these thoughts/questions:

1- Gordon's Garage - Fast Cars or Clean Air?

2 - http://www.mechadyne-int.com/vva-ref...-emissions.pdf

Quote:
Originally Posted by MorphDaCivic View Post
I took mine to the shop for adjustment, since it was starting to sound like a diesel. FE improved, and sounds much better.
That's encouraging. But I can't go to a mechanic. I have to do it myself for the sake of the family budget plan. "Be the mechanic you wish to see in the world" is my mantra.

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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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