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Old 01-09-2010, 05:17 PM   #301
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Default Re: F20B FAQ

there seem to be alot of ?s about simple things the f20b swap is simple. think of it as a h22 except for the internals, everything out side is the same. so what ever you would do for a h22 do that. just to note the h22 is obd2 3 wire iacv, if your obd1 like me just get a 96 and below IM. the dizzy plugs right up you just need to add the blue wire inside the dizzy to get RPM signal. i know some motors have the crank sensor on the motor thats as simple as extending a wire from there to the dizzy. the h22 TB is much bigger than the f20b (auto). i dont know if any of this info will help but just somethings that sound like they should be put out again.
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Old 01-10-2010, 03:41 PM   #302
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Default Re: F20B FAQ

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Originally Posted by sicc22 View Post
there seem to be alot of ?s about simple things the f20b swap is simple. think of it as a h22 except for the internals, everything out side is the same. so what ever you would do for a h22 do that. just to note the h22 is obd2 3 wire iacv, if your obd1 like me just get a 96 and below IM. the dizzy plugs right up you just need to add the blue wire inside the dizzy to get RPM signal. i know some motors have the crank sensor on the motor thats as simple as extending a wire from there to the dizzy. the h22 TB is much bigger than the f20b (auto). i dont know if any of this info will help but just somethings that sound like they should be put out again.
F20B is OBD2 3 wire IACV
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Old 01-11-2010, 06:40 PM   #303
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Default Re: F20B FAQ

hey guys new to the site , drive a 95 gsr extremely interested in doing the f20b swap wondered if anyone had a list of parts id need for this swap thanks in advance
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Old 01-13-2010, 04:30 AM   #304
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Default Re: F20B FAQ

http://www.honda-tech.com/showthread.php?t=650329

that has all of the basic info youre going to need. There are a few things specific to the F20B, and those things are on several of the pages in this thread. First figure out if your going to use the F20B trans, or since you have a GSR you could do the F2B/H2B so you can retain your trans, have better axle alignment, and be able to use a much better trans. then you wouldnt have to find axles linkages and the like (because you already have it)
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Old 01-16-2010, 10:12 AM   #305
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Default Re: F20B FAQ

okay so my gauge problem i sresolved i just changed over the whole chassis harness from an accord se including cluster everything works now i just need a few questions answered like where is the higbeam fuse located and what thermostat should i purchase for the engine the car runs fine now and i am using the stock pt3 with h22 injectors for now i do have the p13 but i hear i have to change some wires around and am not too sure on how to do this to make it run but i really need to know which thermostat to use and where the higbeam fuse is for now
thanks in advance
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Old 01-18-2010, 08:16 AM   #306
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Default Re: F20B FAQ

im about to get a full exhaust made and was just wondering what size you guys were using. 2.5inch or 3inch?
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Old 01-21-2010, 08:21 AM   #307
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Default Re: F20B FAQ

also i wanted to see if you guys thought that the stock compression ratio is too high for a 6psi jackson supercharger on 91octane. tuning isnt a problem as itll be tuned by bisimoto or church auto
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Old 01-25-2010, 01:01 PM   #308
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Default Re: F20B FAQ

hey i finally got the car started and running now i took off the oil pump and used my old h22 oil pump instead and then i used my h22 intake manifold so i didnt need to snipping wires on the dizzy and used my original dizzy and coil so in term of wiring everything is good but now the damn thing is idling i i cleaned the idle thing on the front of the intake manifold and it still ideling going from 1-3 rpm need to know how to fix it .. mr. jr deleon
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Old 01-25-2010, 03:33 PM   #309
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Default Re: F20B FAQ

First off which TB are you using? Have you checked for vacuum leaks (remember you have swapped manifolds and those gaskets should not be reused)
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Old 01-26-2010, 07:51 AM   #310
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Default Re: F20B FAQ

also bleed your coolant. sometimes air in the system messes with the idle.
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Old 01-27-2010, 09:46 AM   #311
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Default Re: F20B FAQ

Only issue is, you'd have to be quite low on coolant to have the surging problem he's having. But yes it has to be bled otherwise it could cause numerous problems, including no heat and improper cooling.

Check the cooling system out to eliminate that possiblity. check for vacuum leaks coming from any parts you've removed that have gaskets. Do you have a chipped ecu in there? Which TB are you using? Just need to know to help out
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Old 01-27-2010, 12:21 PM   #312
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Default Re: F20B FAQ

Hi im a nooby here wanting to put JDM f20b in my 99 accord 4dr 5sp it's a vtec sohc f 23 now. My 1st Q is how bad is it to wire this combo ? also i know the f20b does not have crank sensor its in distributor anyway. Will my distributor wires go to the f20b plugs wires like red to red green to green or can i run stock diz from f23 sohc or what ? any advice will be greatly appreciated

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Old 01-27-2010, 12:32 PM   #313
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Default Re: F20B FAQ

should hav said this in the 1st post. I'm wanting to do this because i found a good deal on a f20b 5sp lsd and ecu. The guy said it will drop right in just wire in my distributor wires to the f20b plug and the ecu make up for no crank sensor,wire in 1 extra knock sensor and 3 wires from vtec to ecu. Is this true or just a bunch of crap to sell me the engine. PLEASE HELP
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Old 01-27-2010, 03:12 PM   #314
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Default Re: F20B FAQ

First take your Accord harness and put it on the F20B as it looks on your F23. Plug in as many sensors you can. I start with the injectors and go from there. Some will need to be extended, added (knock sensor if you choose to run it or if you have an engine management you can do without it) others might have to be changed. With it being a vtec F23, there's no need to add any vtec wires. As for the crank sensor, trace the crank sensor wires from your F23 oil pump up through your harness. Cut them from there leaving enough slack to reach the dizzy. Then pull them up towards the distributor and add them to the plug. If you do it that way, not only will you get your crank signal, but you dont have to mess around with the wires down to the ECU.

Thats how I've done it and it's never failed me. In fact, my swap wiring looks like stock harnesses do
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Old 01-28-2010, 06:42 PM   #315
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Default Re: F20B FAQ

Ok it official i got the f20b and 5sp LSD today 3 1/2 hour ride one way to VA but i got'er just got home and she's a beaut. Damn i won't sleep tonight im excited WHOO HOO! IT'S ON
now to get the dizzy wires figured out so i can swap'em. I think everything else will be minor other then the wiring hope you guy can help me out.
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Old 02-17-2010, 05:53 PM   #316
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Default Re: F20B FAQ

hello everyone anyways im also a newbie here lol but i was wondering for the ECU setup, would i just convert the obd2 to obd1?? since i want to run obd1.
the car is a crx so it'll be obd0, so how would i do that???
sorry if this is a really confusing question
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Old 02-22-2010, 06:30 PM   #317
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Default Re: F20B FAQ

So what headgasket can be used? I didn't see that info on the first page?
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Old 02-24-2010, 12:49 PM   #318
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Default Re: F20B FAQ

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So what headgasket can be used? I didn't see that info on the first page?
http://www.autodynamics-honda.com/hopcbcyhega.html

I've bought 2 from them, there legit.
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Old 02-24-2010, 01:11 PM   #319
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Default Re: F20B FAQ

does anyone know what the factory ecu ignition timing is set at? and for the ones out there that have got there f20b's tuned with came gears. where are they set at?
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Old 02-27-2010, 11:20 PM   #320
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Default Re: F20B FAQ

no other option for head gasket? aftermarket?... thought I saw someone had a Hondata head gasket on an F20B?
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Old 02-28-2010, 12:17 AM   #321
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Default Re: F20B FAQ

for head gasket i went cometic they did me 1 but it wasnt cheap,specially to get it down here to lil ol NZ.
info im after is if i put a Euro R inlet manifold on my Blue top F20b and im still running the OBD2 ECU am i gona get a CEL code an will IACV etc still fit/function with my current harness??
have the Euro R TB to go with the mani and the Euro R fuel rail but only F20b injectors,will my injectors fit the new fuel rail??
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Old 02-28-2010, 01:19 PM   #322
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Default Re: F20B FAQ

No aftermarket head gaskets for the F20B, not even from Cometic. Hondata makes thermal gaskets for the intake manifold. They do not make head gaskets at all
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Old 03-01-2010, 12:14 AM   #323
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Last 2 posts r kinda conflicting.... Torneoboy: was this a custom one off or do they now make them? Very curious to see if someone does that will up the compression!!!!
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Old 03-01-2010, 07:00 AM   #324
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for the price i paid it may have been custom i just went to my parts supplier and said i wanted 1,said he couldnt find 1 anywhere for it then all of the sudden he had a price for a cometic 1 direct from the states for me.
if they made me 1 though theyl make you 1 too and you wont have to worry bout the crap KIWI to U.S exchange rate or international shipping so price will be much better
it is however still a triple layer so dont see it affecting my compresion much,if they make you 1 custom see if theyl do a dual layer instead of a triple
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Old 03-01-2010, 07:03 AM   #325
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soooo..... will i get a cell code if i use a euro throttle body on an f20b with OBD2 ?
what would i need that it doesnt already have?
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