So i'm swapping out my H23 to the H22 and i'm wondering if it is necessary to swap the ECU as well? I'v heard you don't need to but it's a good thing to do. If it's not what are the benefits from swapping out the ECU to the H22 ECU vs. keeping the H23 ECU?
Yes. It's necessary. The H23 uses the P14 ecu, and the H22 uses the P13 ecu.
If you use the P14 with the H22 it will run poorly as the fuel and timing maps are incorrect as well as not having VTEC functioning, and lower redline.
I called a company in fl my friend told me about that sells tuned ecu's. They said i would be better off getting a P28 ecu cuz there is more you can tune on them and there is some sort of nitrous upgrade they can do to it for cars that have nitrous, which mine will have in a month or so. The company is called speed innovations. Has anyone heard of them or doing the P28 ecu instead of the P13? Btw, the ecu is $250. Does that seem a lot or about right?
With the P28 you can tune it any number of ways (Hondata, ECTune, Neptune, Uberdata...) but the main thing to remember is you need to get it tuned on a dyno by someone who knows what they are doing (can't stress that enough) before you actually drive it. Every engine is unique and each ECU should be tuned to the engine it's going to run.
You can get a P28 from phearable.net with a basemap loaded on it for less than $250.
Also, with the P28 you will loose the secondary IAB function in the intake manifold. You can use a P72 instead if you want to retain this function.
With the P28 you can tune it any number of ways (Hondata, ECTune, Neptune, Uberdata...) but the main thing to remember is you need to get it tuned on a dyno by someone who knows what they are doing (can't stress that enough) before you actually drive it. Every engine is unique and each ECU should be tuned to the engine it's going to run.
You can get a P28 from phearable.net with a basemap loaded on it for less than $250.
Also, with the P28 you will loose the secondary IAB function in the intake manifold. You can use a P72 instead if you want to retain this function.
Exactly. P28 is great if you go with an aftermarket intake manifold that doesn't have IAB... In fact, the P72 will run the H22 without a tune. Mind you, the fuel maps are leaner and it really isn't a good idea... plus it falls on it's face when VTEC engages... but it'll get you where you can get it tuned.
Wut is the secondary IAB function? Also, what is your recommendation i should use for an ecu then especially if i will have nitrous installed soon?
Quote:
Originally Posted by red92si
With the P28 you can tune it any number of ways (Hondata, ECTune, Neptune, Uberdata...) but the main thing to remember is you need to get it tuned on a dyno by someone who knows what they are doing (can't stress that enough) before you actually drive it. Every engine is unique and each ECU should be tuned to the engine it's going to run.
You can get a P28 from phearable.net with a basemap loaded on it for less than $250.
Also, with the P28 you will loose the secondary IAB function in the intake manifold. You can use a P72 instead if you want to retain this function.
IAB is a set of secondary butterfly valves (like small throttle bodies), which create a longer intake runner at lower rpms, and they open around the 4900rpm range, which creates a shorter runner. This system gives the H22 good low end torque, while being able to efficiently breathe and make power at high RPMs, which is absolutely necessary for VTEC to make a difference in power.
IAB is a set of secondary butterfly valves (like small throttle bodies), which create a longer intake runner at lower rpms, and they open around the 4900rpm range, which creates a shorter runner. This system gives the H22 good low end torque, while being able to efficiently breathe and make power at high RPMs, which is absolutely necessary for VTEC to make a difference in power.
Another option you might have is keep your h23 ECU and add the vtec sensor and just run a AFC and u can tune it with that too, cuz i heard the h22 ECU tend to have alot of problems. Thats what I'm doing for my h23a block with h22 head, it might be different if u just have the h22 idk, does anyone knw...???
Another option you might have is keep your h23 ECU and add the vtec sensor and just run a AFC and u can tune it with that too, cuz i heard the h22 ECU tend to have alot of problems. Thats what I'm doing for my h23a block with h22 head, it might be different if u just have the h22 idk, does anyone knw...???
The H23's P14 is not able to actuate VTEC. You will NEED a P13. You'll also need, depending on the year of the Prelude, a way to wire VTEC. If it is a 93+ Si or VTEC, it is already wired for it. 92s are not.
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