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Old 07-11-2013, 04:04 PM   #7 (permalink)
California98Civic
Cyborg ECU
 
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

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)
Thanks: 2,373
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Quote:
Originally Posted by cbaber View Post
What RPM are you at going 60 mph? Do you contribute your success to the aeromods or the long VX gearing, or a mixture of everything?

I've got to repair my HX transmission and I have been thinking about just swapping it for a VX instead of repairing. Right now I am at 2250 RPM at 60 mph. I have slightly taller tires than stock.
I'm around 1950rpms at 60mph. The '93 CX transmission is without doubt a big factor, but I follow the idea of getting a bunch of small benefits from multiple mods--weight, engine, and aero--together and "stack" them up until it equals a big difference. The biggest benefits seemed to come from deleting the power steering and the alternator. Deleting 200+ pounds in weight from the car. Pumped up tires. And the airdam and grill blocking. I think the WAI helps too--or at least my testing suggested it did.

I did very little hypermiling, by my standards, on this trip. So the engine kill switch was less significant than usually. I held steady throttle as much as traffic or hills permitted. At some stretched the instant MPG reading would cross 70. At others it would be under 60. I did some mild drafting, one or twice cut the engine, coasted in neutral down the rare large hills or when traffic piled up in front of me.

Warm weather helps a lot. I won't get this number in the winter.

Need more aeromods!
__________________
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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