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Old 12-02-2011, 11:11 PM   #1 (permalink)
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Join Date: Nov 2011
Location: Hallsville, MO
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CRX - '90 Honda CRX HF
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Possible CRX HF Mod Questions

I've ordered a MPGuino and am waiting to install it before doing any modifications to my CRX. I would like to establish a baseline first. BTW, does anyone know how long it takes to receive the MPGuino?

For now I've been trying different driving styles to see how that alters my MPGs.

Mods I'm Considering:
-Radio Delete, (I don't listen to it)
-EGR Port Cleaning
-Fuel Injectors Sonic Cleaned
-Valve Adjustment
-Increase Tire Pressure
-VX Wheels w/ LRR Tires, (when the time comes)
-Complete Tune-Up
-FI Cut-Off Switch
-Remove Spare Tire + Tools
-SeaFoam Treatment
-Amsoil 0W-30 Motor + Transmission
-Lower Ride Height

Questions:
-Will I see a noticeable difference in fuel economy by lowering the ride height of my CRX?
-Are the Civic VX wheels lighter than the 90 CRX HF wheels?
-What LRR tires do you all like?

The HF:




Thank You,
~Jason

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1990 CRX HF

Last edited by jasonst; 12-03-2011 at 10:53 AM..
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Old 12-02-2011, 11:58 PM   #2 (permalink)
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Location: Alabama
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Aerofocus (retired) - '00 Ford Focus ZX3
90 day: 44.66 mpg (US)

The Red Baron (sold) - '93 Geo Metro
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the amount of mpg you save versus the cost of lowering is probably not that great, but lowering your car does increase fuel efficiency. For LRR tires, I prefer Bridgestone Ecopia EP422's, because those happen to be the cheapest in my area in my size. I'm sure it varies by region. Goodyear assurance fuel max and michelin energy savers are also good. I don't know about the weight of the wheels but I can guarantee that they are close in weight. I'm sure someone on here knows.

By the way, that is one clean CRX! you've got a great car to work with.
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Old 12-03-2011, 01:26 AM   #3 (permalink)
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Location: Coastal Southern California
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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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Nice little car. I have seen the CRX phone dials described as 18lbs on honda tech. My VX wheels are 9.7lbs. Roughly you might double that number to figure rotational mass. Ride height, I plan to test lowered ride height using $30 clamps (plus an alignment) instead of committing to new coils for 20 times more. Deleting your radio will not make much difference. Don't mar that good-looking dash.
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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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Old 12-03-2011, 04:06 AM   #4 (permalink)
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The original tires for the 1st-gen Insight (I think Bridgestone RE-90s in one particular size?) seem to have very low RR. Worth a look for those.

-soD

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