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Old 09-01-2016, 10:25 PM   #1 (permalink)
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Default New '01 5-speed owner, want the final word on HX rim vs. stock concerning MPG

This may have been decided long ago but the search function will not process an inquiry less than 3 letters ("HX" for instance). My question is, with all things being equal (same car, driver, commute, etc) would '96-00 Civic HX rims on RE92's be comparable in MPG to stock '00-06 Insight rims on the same RE92 tire?

I ask because I recently purchased an '01 5-speed Insight with 114k on the clock. My old daily is a '97 Civic Hatch with a D16Y5 swap with HX rims. This car must be sold to make room for the Insight. I prefer the look of the HX rims and they are in much better condition than the rashed and peeling Insight rims that have tired RE92's on them. Being that I will need new tires anyway, why not swap wheels now and add style to my new ride? This is solely a MPG question.

Thanks,
Mak
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'89 CRX HF + D15Z1 swap [60mpg or 80mph in 2nd gear, albeit not simultaneously.]

'97 Civic Hatch + D16Y5 swap [106hp to 700hp back to 115hp.]

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'01 Insight 5-speed 378k [Project Megatron: A bedeviled K24a2 swap]
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Old 09-01-2016, 11:53 PM   #2 (permalink)
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You can't use HX rims because I am using them on my car :v. No copycat.

OK seriously though, they are actually extremely close in weight, with the the HX being lighter by about 1/4-1/2lb per rim. I have swapped back and forth and they get the same exact mpg, they just look wayyyyyy better than stock insight rims.

Just remember, you can't use them because I AM USING THEM >:lllll.
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Old 09-02-2016, 12:22 AM   #3 (permalink)
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Imitation is the sincerest form of flattery. If it makes you feel better Balto, mine are anthracite in color and the car is red (faded on top). I'll rep the east coast and you can have the west. No rap feuds.

Anyone else do an ABA test? The tires on the HX are not LRR so I'm exempt for now.

Mak

P.S. Do you have a pic of your setup Balto?
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'89 CRX HF + D15Z1 swap [60mpg or 80mph in 2nd gear, albeit not simultaneously.]

'97 Civic Hatch + D16Y5 swap [106hp to 700hp back to 115hp.]

'01 Insight 5-speed 114k [The civilized stocker.]

'01 Insight 5-speed 378k [Project Megatron: A bedeviled K24a2 swap]

Last edited by Makitadiesel; 09-02-2016 at 12:24 AM.
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Old 09-02-2016, 02:38 AM   #4 (permalink)
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Quote:
Originally Posted by Makitadiesel View Post
Imitation is the sincerest form of flattery. If it makes you feel better Balto, mine are anthracite in color and the car is red (faded on top). I'll rep the east coast and you can have the west. No rap feuds.

Anyone else do an ABA test? The tires on the HX are not LRR so I'm exempt for now.

Mak

P.S. Do you have a pic of your setup Balto?
:3. I have done 'ABA' testing. I had a set of RE92'S on stock rims that I swapped onto my HX and installed on my car and my MPG's didn't change whatsoever.
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Old 09-02-2016, 08:03 AM   #5 (permalink)
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Quote:
Originally Posted by Makitadiesel View Post
This may have been decided long ago but the search function will not process an inquiry less than 3 letters ("HX" for instance). My question is, with all things being equal (same car, driver, commute, etc) would '96-00 Civic HX rims on RE92's be comparable in MPG to stock '00-06 Insight rims on the same RE92 tire?
IMO, it is virtually impossible to answer this kind of question with ABA testing, because of the difficulty of controlling the amount of lean burn in your test segments. I've tried testing Moon caps, a similar kind of question.

You can come at this a couple of ways. First, Honda already had the HX wheel in inventory when they designed the Insight wheel. Their engineers must have thought there was a small improvement in the redesign. The Insight MPG performance is made up of many small improvements laid end to end - some improvements being large, so pretty small. The wheel issue is "probably" one of the small ones.

Second, the improvement would come from weight, aero and perhaps offset position. The weight difference is negligible, as already point out. The difference in aero performace will be the only possible improvement and that is probably impossible to measure.

I say, if you like the HX, then use it. Balto already said he couldn't find any difference in testing.
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Old 09-02-2016, 09:09 AM   #6 (permalink)
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HX wheels will suffer a very minor aero penalty at higher speeds. You could just, while they're off the car, put some vinyl on the inside of the wheel, flush with the backs of the spokes, and probably get their aero to be better than the Insight rims.
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Old 09-02-2016, 12:48 PM   #7 (permalink)
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best be careful when covering the wheels for fear of heating issues
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Old 09-02-2016, 04:31 PM   #8 (permalink)
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Quote:
Originally Posted by Makitadiesel View Post
...I recently purchased an '01 5-speed Insight with 114k on the clock.
If you don't mind me asking, what did you pay? Congrats on your purchase!
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Old 09-02-2016, 05:04 PM   #9 (permalink)
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best be careful when covering the wheels for fear of heating issues
Depending on who's driving you'd probably be fine even without any flow through the outside of the wheel. The Insight is a small, light car, so the brakes aren't going to be worked that hard. In addition, the brakes are only engaged after you've tapped out the regenerative braking. A decent driver should be bleeding off a good chunk of their speed through the regen system, and thus not generating a lot of heat at the wheels from the brakes.
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Old 09-05-2016, 06:35 PM   #10 (permalink)
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$2,800 AlexCA. From the maiden drive home from Richmond she did rather stellar, 67.2 mpg over 250 miles with ECON AC blowing most of the time. My driving habits are fuel conscious but no engine off cruising or kill switches or pulse and glide, just lots of regen. I'm a 'practical' hypermiler who reduces weight or modifies subtle, non apparent aspects (taller gearing, underbelly panels, Ultragauge, in my older Hondas) but likes the look of a near-stock car. Possibly HX wheels, lower it a bit in the future, paint and trim, done.

Mak
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'89 CRX HF + D15Z1 swap [60mpg or 80mph in 2nd gear, albeit not simultaneously.]

'97 Civic Hatch + D16Y5 swap [106hp to 700hp back to 115hp.]

'01 Insight 5-speed 114k [The civilized stocker.]

'01 Insight 5-speed 378k [Project Megatron: A bedeviled K24a2 swap]
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