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Old 06-22-2011, 04:49 AM   #1 (permalink)
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HI

Hi Everyone,
I have a 1987 honda Civic CRX SI 1.5 L Fuel Injected little car. I want to put an HF engine inside of it to boost my fuel economy. Does anyone know if it will work?
Thanks,
Mike

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Old 06-22-2011, 04:50 AM   #2 (permalink)
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also, I would like to hear any other suggestions to boost MPG. my job demands a whole lotta city driving, so any little bit helps.
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Old 06-22-2011, 11:01 AM   #3 (permalink)
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One of our other members here, SVOboy put a civic VX engine in his and was hitting 60+ mpg. I'd probably recommend going that route.
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Old 06-22-2011, 02:46 PM   #4 (permalink)
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Quote:
Originally Posted by mike1611 View Post
also, I would like to hear any other suggestions to boost MPG. my job demands a whole lotta city driving, so any little bit helps.
Daox has a great suggestion re: the VX. But if the HF engine is compatible with your generation civic then you might do that too. You might consider simply a transmission swap instead of the whole engine. Seems much of the FE benefits for these guys is in the gearing.

As for driving tips, consult the 100+ hypermiling tips in the links above. Do whatever appeals to you. Experiment.

Start a fuel economy log here on the site. You'll get a good record of a baseline before you start modding, and you'll be able to track improvements.

Good luck!
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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 06-22-2011, 10:50 PM   #5 (permalink)
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Is the HF Compatabable with my SI? How would I know? I'm assuming it is.
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Old 06-22-2011, 11:52 PM   #6 (permalink)
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welcome to em
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Old 06-23-2011, 12:41 AM   #7 (permalink)
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Quote:
Originally Posted by mike1611 View Post
Is the HF Compatabable with my SI? How would I know? I'm assuming it is.
These cars were built in the period where Honda started standardizing more of the parts, from what I understand. Unless the HF had a different series engine than your Si (perhaps D-series instead of B-series), it should just bolt up. I have never done this yet. I'm following only what I read here, on Honda forums, in books, and such... But as I understand it, the transmissions within one generation Civic, within the same series engine, are easily swapped. Anyone care to correct or corroborate me?
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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 06-23-2011, 12:59 AM   #8 (permalink)
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My CRX SI is a 1st generation. If I find a CRX HF block that is also a 1st generation, within the same series, than I should have no problem? Sounds easy, just need the $$$.
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Old 06-23-2011, 01:06 AM   #9 (permalink)
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Neon - '95 Plymoth Neon
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but it might be easier just to switch out the tranny siince most of the FE benifits are there . just read that.

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