Honda CRX HF Gearing ...and/or engine swap - Page 3 - Fuelly Forums

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Old 08-31-2006, 11:29 AM   #21
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Oh, surely, you're not, but the HF is already very long on gearing and reducing the inertia and rolling resistance of the tires, I think, is worth it.
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Old 08-31-2006, 11:39 AM   #22
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I've thought about that. Which is why I would only do this if I could find a larger wheel/tire setup without a marked difference in weight. I would assume backspacing could also play a (minimal) role here as well, even if the tire/wheel weights were to differ. Anyway, isn't this only REALLY a valid argument when referring to stoping & going (overcoming that inertia)? Once you've achieved your driving speed I would think that amount of rotating mass would tend to work more for you, rather than against. (Such is the case for flywheels....any why NOT to get a flywheel that's too light, right?) Calling all engineers/Physics geeks?????? "help"
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Old 08-31-2006, 01:18 PM   #23
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Yeah, intertia and such doesn't matter so much when rolling already except mehbe in friction, but dan did gain ~3 mpg going from his 15s to his HX with LRRs.
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Old 08-31-2006, 03:51 PM   #24
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Yes, MPG on the highway but also I went from 185 to 165 wide in addition to the LRR. Who knows if less weight had to do with it. I suspect not.
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Old 08-31-2006, 04:01 PM   #25
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Oh, I'm not saying about weight, just that large rims aren't always better.
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Old 08-31-2006, 06:02 PM   #26
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Quote:
Originally Posted by Brian D.
Great! Your from my (weekend) homeland...sort of. I drive from VA Beach to Monmouth Cty, NJ every weekend. Anyway, I don't know a whole lot about transmissions...and never cracked one open. What's the deal with the final drive? I sure wish I had my old '91 HF...now THAT was the tranny/gearing to have. Instead I've got this crappy gearing that makes me work like hell just to obtain 47MPG. I used to get 50-55 MPG in that old '91. Okay, what's my solution?? I'd love to go 6-speed...but somehow I don't see that as feasible. **Are you a Honda head? If so I've got more questions for you (FE questions).
maybe the california engine sucks also? i'm getting almost 50mpg out of my hf with si tranny, though i do drive slower, and accelerate slower than i did with my hf tranny.

what exactly is the difference other than poorer mileage with the california models, and why did california need a poorer performing car?
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Old 08-31-2006, 06:04 PM   #27
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If anything it's not the engine, it's the ECU.

But anyway, they have stricter emissions, that's about all there is to it.
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Old 08-31-2006, 06:09 PM   #28
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yes but wouldn't better gas mileage = lower emissions? according to the government site the california car emmits 4.1tons vs 3.7 for the regular. or was california going after a certian pollutant?
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Old 08-31-2006, 06:16 PM   #29
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I'm sure there's something about the lower RPM. They also don't allow lean burn on the VX. Same with canada.
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Old 08-31-2006, 09:01 PM   #30
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CDN VX's lean burn.
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