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F20B

 
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Old 05-15-2014, 10:29 PM
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Icon9 F20B

Before I really begin, I have done tons of research as to how to conquer this. BUT I must resort to starting a new thread because not one thread, nor conglomerate of threads collectively could answer my questions.

To start, my beloved 1999 Base model's original engine has just bitten the dust, after 210,459 hard miles. And I mean HARD miles. I don't baby her whatsoever. It all started with a lack of the ability to catch itself on idle drop (would die a few seconds after I pushed the clutch pedal in for deceleration) then it started knocking on the highway, only at ~3K RPM, then the entire RPM range, I lost power and she let out a shudder and some horrific noises and an incredibly vast cloud of oil and smoke. I feel bad for the driver of the car behind me, as they are probably cleaning oil residue off their paint.

Anyway, I've now got to throw my RSX back together so I have something to drive to my interviews as I'm currently jobless. I need to ask a few things about swapping an F20B into my Prelude, as it appears to be the cheapest route that will work perfectly fine.

1) I know I must use the H22 thermostat housing, crank pulley, intake manifold, distributor, and all of the ancillary brackets. I also know that to make it a drop-in affair, I must swap over the driver's side motor mount and utilize an H22 oil pump (do F20Bs have balance shafts?)

2) My issue is the ECU. being a 1999, I have an OBD2B car from what I understand. I would rather not use the factory H22 ECU for long as it is not intended for the F20B's smaller displacement and higher redline. I don't want to burn super hot (lean, less likely) but I don't want to burn super cool (rich) either.

3) I'm wondering if I can order some sort of F20B ECU that will plug in to my car and drive. I don't know if they have immobilizers and if they do how would I go about bypassing all that stupid nonsense? I don't want to do an OBD1 conversion to get rid of it, because I don't know if I'll end up selling it to someone who lives in an emissions-controlled state and I don't want to screw them over. I'm that kind of guy.

So if any of you know the answer to my woes (besides another H22) please, do tell. If you have any links I may have missed, please provide at will. If my writing style is too complex, please put a few brain cells' worth of thought into your response.

Thank you.

Edit: Found out that all 96-01Preludes are OBD2A. And JDM ECUs don't have the immobilizer or that emissions crap. Hmm. Would the standard F20B ECU plug in and go then?
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Old 05-16-2014, 12:17 AM
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Re: F20B

chipped p28 i think you'd have to use with a conversion harness
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Old 05-16-2014, 12:59 AM
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Re: F20B

OBD1 Conversion is out of the question right now, especially since some areas around where I live still do E-Checks. Can't do that.
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Old 05-16-2014, 05:38 AM
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Re: F20B

F20b has balance shafts

The PCB ecu would be the correct ecu for the F20b.

I don't think the JDM ecu will scan with an obd2 scanner.

It also would have a speed limiter at like 110 which isn't a big deal for me these days but may be something you wouldn't like. I guess the biggest question would be, could you use your stock ecu to pass emissions if it would run the car close enough to pass. I think the F20b should run pretty decent on an H22 ecu, I ran one on an h22 map on a p28 and it did well but that was obd1 setup on the f20b long block.

The F20b is a great choice for a replacement engine. Keep in mind that there are two versions, the 185hp auto and 200hp manual. I don't think many engine importers will sell you the 200hp one without buying the LSD trans with it, most of your stand alone F20b long blocks come off of automatics, which may have had an easier life. I believe the auto lacks a little compression and valve lift. It may be closer to passing because it has a compression ratio comparable to the usdm H22.




And don't think about selling your prelude lol keep her forever sounds like she's been pretty good to you :)
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Old 05-16-2014, 06:44 PM
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Re: F20B

Both of the importers I would buy from do have manual versions available. Now, I'm also debating just going with an H22A swap since I know it will run perfectly on the stock ECU. I'll still have to swap over the intake manifold, ancillaries, distributor, and new oil pump for the CKP/TDC stuff (I absolutely refuse to hack this car together, I made my own relay harness for my HIDs because DDM Tuning's wasn't good enough lol). I've only had it for two years, bought it at 176K miles, knew it was going to blow up eventually. I need something to tie it over to its inevitable K24A2 swap or until I sell it. No clue when either would happen. So an F20B would basically bolt in and run on an H22 ECU?
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Old 05-22-2014, 02:31 PM
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Re: F20B

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Originally Posted by crash_1340 View Post
So an F20B would basically bolt in and run on an H22 ECU?
mmm nope
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Old 05-22-2014, 07:54 PM
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Re: F20B

Type T:
You get married or something while you were gone?

You're bein' all............
Gentle lately
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Old 05-23-2014, 01:24 AM
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Re: F20B

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Originally Posted by bykfixer View Post
Type T:
You get married or something while you were gone?

You're bein' all............
Gentle lately
I hate marriages...
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Old 06-03-2014, 03:15 PM
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Re: F20B

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I hate marriages...
LOL, agree, but I don't mind the receptions with open bar
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