What kind of ECU do you need for Honda H22A?
This was the only 4th generation Prelude that had an OBDII engine computer. This makes the ’96 ECU a very desirable ECU for H22a swaps into OBD II Accords. In ’97, Honda incorporated a theft deterrent immobilizer system that makes using ’97-’99 ECU’s much more difficult.
What’s the difference between h22a4 and h22b4 block?
h22a4 = open deck. They used open deck for better cooling purposes. having an open or closed deck with boost really isnt going to matter until you really start pushing MAJOR power. Once you are sleeved, the fact that one is open and one is closed is rather minute. H22a = 10.6:1 compression h22a4 = 10.0:1 compression
Can a H22A be swapped for an OBD I?
Keep this in mind when planning your swap. If an OBD II ECU is a must, you will need to convert your OBD I engine oil pump to the newer style that accepts the crank located crank trigger. Distributor Wired and ready. The most difficult part of this project was the wiring change from an OBDII Accord to an OBDI H22a.
What kind of line do I need for a H22A?
You will need the original high pressure line from your car and most of the H22a line that came with the donor engine. Take the lines to a reputable shop that does high pressure lines. Use the complete line from the prelude along with the hard line from the accord (the hard line from the rack side). This setup worked flawlessly.
This was the only 4th generation Prelude that had an OBDII engine computer. This makes the ’96 ECU a very desirable ECU for H22a swaps into OBD II Accords. In ’97, Honda incorporated a theft deterrent immobilizer system that makes using ’97-’99 ECU’s much more difficult.
What kind of Mounts do you need for a H22A?
In order to drop in the H22a without hassles, it will be necessary to use the rear, passenger side and front accord engine mounts as well as the Prelude driver’s side mount. The other prelude mounts will NOT work. Also, you will need to grind down the driver’s side prelude mount to make it fit properly. A little persuasion never hurts.
Can a H22A engine be swapped for a F22A?
While researching the swap, I discovered that the ’96, ’97-’99 H22a engine wiring harness plugs are different than those found on ’96 and up F22a plugs. This leaves you with two options: Modify the Accord harness to work with the new engine or find a conversion harness.
Keep this in mind when planning your swap. If an OBD II ECU is a must, you will need to convert your OBD I engine oil pump to the newer style that accepts the crank located crank trigger. Distributor Wired and ready. The most difficult part of this project was the wiring change from an OBDII Accord to an OBDI H22a.