I drive a 93 prelude vtec with my original engine at 240k mileage. This guy selling his H22a4 long block to me. Can i still use my h22a1 tranny over with the h22a4? Plus, will the ecu fit directly or i'll need some changes like converting connectors? I appreicate any advise and help." What do i need to know??" I need some info fast. Thank you

 

Yes, any H or F Series Tranny will work on any H or F Series Block, EXCEPT for the Prelude SH with the ATTS.

You can use the same ECU, but you have to convert the A4 to OBD1, which is just a few things that are different.. Not much converting..

You will have to use the Injectors from your motor, as the A4 Injectors are (If stock) Saturated Injectors, High Impendence 290cc. And your A1's are Peak & Hold, Low Impendence 345cc.

You can check this write-up out, it actually a H23 to H22A4, but it's the closest you're gonna get...
http://www.jrcormier.com/

If anyone else know anything that needs to be changed, please add..

 

So i have to use/swap my injectors from my a1 to the a4? Can i use the a4's ecu and plug it right up with my connector or i'm going to buy that covert connector thing? i hope all the connectors (dizzy, o2 sensor, etc..) are the same and will fit directly.

And one more thing, will the a4 header blot perfect to my cat convert? thanks again

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Prelude951 &raquo;</TD></TR><TR><TD CLASS="quote">So i have to use/swap my injectors from my a1 to the a4? Can i use the a4's ecu and plug it right up with my connector or i'm going to buy that covert connector thing? i hope all the connectors (dizzy, o2 sensor, etc..) are the same and will fit directly.

And one more thing, will the a4 header blot perfect to my cat convert? thanks again</TD></TR></TABLE>

Make it easy on yourself just install the motor. Your making it out to be harder then it is. Use the same intake manifold in the car now. There is no need for wiring and/or swapping ecu's or changing injectors ect

 

No, you can't use the A4's ECU (Yes, you'd have to get a harsness converter if you did) since you have a Resister Box, otherwise you'll have to remove that and what not.. So it's just easy to swap the injectors.. You could do what md23 said and just swap the Intake Manifold..

If anything doesn't work correctly then just swap it from you A1 and put it on the A4.

I dunno of the A4 Header.. I dout it though.. A '97+ Header is different than the '92 - '96 Header I think. And if the A4 came out of a Prelude SH, then NO you can not use the Header for sure..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MLBZ521 &raquo;</TD></TR><TR><TD CLASS="quote">No, you can't use the A4's ECU (Yes, you'd have to get a harsness converter if you did) since you have a Resister Box, otherwise you'll have to remove that and what not.. So it's just easy to swap the injectors.. You could do what md23 said and just swap the Intake Manifold..

If anything doesn't work correctly then just swap it from you A1 and put it on the A4.

I dunno of the A4 Header.. I dout it though.. A '97+ Header is different than the '92 - '96 Header I think. And if the A4 came out of a Prelude SH, then NO you can not use the Header for sure..</TD></TR></TABLE>

You guys are thinking way to much. Just swap in the bare longblock and use everything already there. Ie the old intakemanifold, header, tranny, ect

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by md23vtec &raquo;</TD></TR><TR><TD CLASS="quote">You guys are thinking way to much. Just swap in the bare longblock and use everything already there. Ie the old intakemanifold, header, tranny, ect</TD></TR></TABLE>

lol, Yeah I know.. I wasn't suggesting using the orginal A4 parts..
Just answering his questions that he asked about specific parts..

I would use the old stuff if I already had it and it was in good/useable condition..

 

Its a direct swap. You only have to convert the injectors ,alternator, and distibutor to obd 1. Use your same ECU

 

ok i want a direct swap the a4 long block using everything on a4. i dont want to swap intake and all that. just a whole piece of a4 long block right on my a1 tranny and still use the same ecu. will buy the obd1 to obd2 converter. Will that be simple like that? let me know. thanks for all your respond and advise.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Prelude951 &raquo;</TD></TR><TR><TD CLASS="quote">ok i want a direct swap the a4 long block using everything on a4. i dont want to swap intake and all that. just a whole piece of a4 long block right on my a1 tranny and still use the same ecu. will buy the obd1 to obd2 converter. Will that be simple like that? let me know. thanks for all your respond and advise. </TD></TR></TABLE>
No your making it to hard again. Just switch the longblocks (A1 out A4 in) its that simple. Yes everything will bolt right up since ur car is already vtec you do not have to wire anything or buy anything extra except new gaskets ie intake manifold, exhuast manifold gaskets and call it a day.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Prelude951 &raquo;</TD></TR><TR><TD CLASS="quote">ok i want a direct swap the a4 long block using everything on a4. i dont want to swap intake and all that. just a whole piece of a4 long block right on my a1 tranny and still use the same ecu. will buy the obd1 to obd2 converter. Will that be simple like that? let me know. thanks for all your respond and advise. </TD></TR></TABLE>

No that will not make it simple..

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by md23vtec &raquo;</TD></TR><TR><TD CLASS="quote">
No your making it to hard again. Just switch the longblocks (A1 out A4 in) its that simple. Yes everything will bolt right up since ur car is already vtec you do not have to wire anything or buy anything extra except new gaskets ie intake manifold, exhuast manifold gaskets and call it a day.</TD></TR></TABLE>

Exactly what he said..


Ok, you can't use the same ECU.. ECU from A1 DOES NOT work on the A4. Why would you buy a harness converter and A4 ECU when you could just use the A1 ECU?
Also, to use the A4 ECU you would have to remove the resistor box. Why do that when you could just swap the Injectors and not have to change the ECU nor remove the Resister Box.

Just do what md23 says, swap just the block, nothing more, nothing less.. No point in buying all that other stuff that is actually a DOWN GRADE as OBD2 ECU's are pointless (Can't chip/modify as easy), and the A4 Injectors are SMALLER than the A1's...

 

hmm i thoght the a4 tranny mounts were different because you have to use a tranny from a 99 to 01. theres a diff between the a4 and the atts a4 as most of you know. Now are you sure you have a base A4.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Prelude951 &raquo;</TD></TR><TR><TD CLASS="quote">ok i want a direct swap the a4 long block using everything on a4. i dont want to swap intake and all that. just a whole piece of a4 long block right on my a1 tranny and still use the same ecu. will buy the obd1 to obd2 converter. Will that be simple like that? let me know. thanks for all your respond and advise. </TD></TR></TABLE>

1) The "engine" will drop right in. Use your stock A1 wiring harness. Most of the plugs, if not all, will fit.

2) Use your A1 injectors and fuel rail.

3) Use your A1 distributor and external coil.

4) Use your stock ECU.

An ECU is more chassis specific. If you have an OBDII chassis (97+), you can switch over to OBDI by using an OBDI ecu, and the corresponding OBDII to OBDI adapter harness. Advantages of OBDI is being to run a chipped ECU, or Hondata. Less emission requirements, and ease of tuning. Since your chassis is already OBDI, you don't need anything. The ECU does not care if there's an "A4" stamped on the front of the motor. All it sees are electrical signals from all the sensors on the motor.

Another note: The A4 block will have the crank position sensor down by the rear lower part of the timing belt. You do not have to hook that up, as it's already built into the OBDI, A1 distributor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Prelude951 &raquo;</TD></TR><TR><TD CLASS="quote">ok i want a direct swap the a4 long block using everything on a4. i dont want to swap intake and all that. just a whole piece of a4 long block right on my a1 tranny and still use the same ecu. will buy the obd1 to obd2 converter. Will that be simple like that? let me know. thanks for all your respond and advise. </TD></TR></TABLE>

did you not read what I posted??? Use YOUR ECU and swap over your injectors, alternator, and distributor.

 

ok that sounds good, i was just confused. So just my a1 intake with the fuel rail, injectors, alternator, distributor and exhaust will be the swap over using the same a1's ecu. Thanks for all your help. I'll keep you guys updated when i'm done with the swap and if any problem occurs. Thank..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Prelude951 &raquo;</TD></TR><TR><TD CLASS="quote">ok that sounds good, i was just confused. So just my a1 intake with the fuel rail, injectors, alternator, distributor and exhaust will be the swap over using the same a1's ecu. Thanks for all your help. I'll keep you guys updated when i'm done with the swap and if any problem occurs. Thank.. </TD></TR></TABLE>

Yes simply swap the motor (A1 out A4 in) and use everythingelse that was <U>already </U>there. Everything bolts up the same.

 

Doesnt he also need a different intermediate shaft. I have this exact swap with a jdm tranny and i needed to have the mounting bracket that holds the shaft to the block moved and welded.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eric416 &raquo;</TD></TR><TR><TD CLASS="quote">Doesnt he also need a different intermediate shaft. I have this exact swap with a jdm tranny and i needed to have the mounting bracket that holds the shaft to the block moved and welded.</TD></TR></TABLE>

well i'm not using any jdm here. only usdm H22. ok will keep u guys update if any problem happens. hopefully not

 

i had a usdm h23 tranny before the jdm and it used the same intermediate shaft.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eric416 &raquo;</TD></TR><TR><TD CLASS="quote">Doesnt he also need a different intermediate shaft. I have this exact swap with a jdm tranny and i needed to have the mounting bracket that holds the shaft to the block moved and welded.</TD></TR></TABLE>

Nope everything will work just swap the longblocks. Even if it was a Jdm engine the intermediate shaft is still the same