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Installation and How-to articles This is not the place to ask questions. Pure Tech only!!

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  #1  
Old 07-23-2009, 05:39 PM
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Default How To: install a h23a vtec blue top

This is right but use at your own risk.i have to say this


yes i know how hard it is to find info on all you will need to do to convert over to a h23a vtec if you have an h22 or such.i just performed the swap a few weeks ago.


i started out with a h22 in my 93 ex 4 door.well i found a good deal on the blue top so i said what the hay i would go for it.its really simple so hear it gose.

as you all know the h23a is an obd2 engine.so if your putting it into an obd1 car like me this is what you will need.and if its going into a obd2 your good to go

parts list

your obd1 engine harness
your driverside h22 engine mount that bolts to the block
your h22 clutch and flywheel
obd1 dizzy
obd1 injectors (you can use the h23a fuel rail)
obd1 alternator
obd1 iacv
p28 with base map (are you can use an obd2 ecu but i dont recommend it because it will be looking for sensors you dont need)
a 1ft long gas line from your local parts store and two brass strait fittings.and 4 small hose clamps

ok the obd1 engine harness is almost plug in play onto the h23a.take all your obd2 stuff off the h23a and replace it with the obd1 stuff you took off your h22.

the only mods you will have to do with the engine harness is make the intake temp sensor and iacv plugin wires longer.this is because the sensors are in different spots and the factory plugins are to short.and you will have to trick your ecu because the h23a dose not have a vtec oil pressure sensor

here we go

and on the h23a the iacv has a 3 prong sensor instead of two like the h22.so take your h22 iacv and set it off to the side and run your water lines to that instead of the h23a one and plug in the obd1 plugin that you just made longer.and then just use the idle screw on your tb to set your idle

as for the fuel line.you will need to make this longer for the obd1 cars.so all you have to do is come off your fuel filter some were the line turns to rubber and cut it.do the same were it connects to your fuel rail.now useing the strait fittings and 1ft fuel line cut it to lengh and connect them together with the hose clamps

on the h23a the driver side engine mount bracket bolt holes are closer together were the after market mount bolts onto it.so will need to take the one off the h22 block and bolt it on the h23a block

ok to trick your computer into thinking it has a vtec pressure sensor all you have to do is go the the ecu and jump A4 and D6 together.just strip back and lil bit of wire and use a 18g jumper wire.thats it for that.


bolt your h22 clutch and flywheel to the h23a

everything else just bolts right to it off the h22.tranny the rest of the mounts i mean everthing

and for the record you use an h22 header and intake manifold if you want to go aftermarket.and dont be scared to buy this engine due to everyone saying you cant get parts.all h23 non vtec and h22 parts are interchangable with it


thanks and good luck



went from this


to this
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Last edited by 1_bad_h22_ek; 07-23-2009 at 11:32 PM.
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Old 07-23-2009, 10:15 PM
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good write-up. the only thing i can say is about the fuel rail. early model h22 have a passenger side inlet like just about every other honda engine. but later model h22's and
h23's have a driver side inlet. other than that, top notch.
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Old 07-24-2009, 03:40 PM
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Quote:
Originally Posted by kamikaze_itr View Post
good write-up. the only thing i can say is about the fuel rail. early model h22 have a passenger side inlet like just about every other honda engine. but later model h22's and
h23's have a driver side inlet. other than that, top notch.
That's a simple fix. Just use either an aftermarket fuel rail or use the earlier model H22's.
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Old 01-21-2010, 12:58 PM
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u can also do this using stock h23a vtec
injectors
dizzy
alternator
you will need to change iacv and depending on which version u have the top part of the im.
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Old 11-21-2011, 01:40 AM
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U could use the blue top 0bd2 injectors just got to do some wiring they have their own resistance so u wont have to spend extra $$$ buying a resistor box. And the dizzy i rather keep the original dizzy n not spend extra cash n just buy an 8point 0bd2 to 0bd1 stepdown dizzy plug,iacv is the only thing i recommend to switch to an h22 plug
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Old 11-21-2011, 05:02 PM
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i know this was aimed toward pep that already have h22 now
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