Need Some motor help?

justme5424 · Post by **justme5424** » Sun Jan 13, 2008 8:34 am

Alright here's the deal. I have a 92 Prelude Si With the H23 DOHC in it, And I was considering swapping another H23 in... But now I'm at a stand still. I was wondering If the F22B DOHC is interchangeable with the H23? and if it is can I still use my H23 Trans and ECU? Reason why I'm asking is because I found that the F22B DOHC is about $200 cheaper than the H23, and if I can use that one with no modifications whatsoever, then I'll go with that one. I need help on this ASAP and If I can't figure it out I guess I'll just stick with the H23. Any help is greatly appreciated guys. Thanks

Keith · Post by **Keith** » Sun Jan 13, 2008 2:13 pm

justme5424;90242 wrote:Alright here's the deal. I have a 92 Prelude Si With the H23 DOHC in it, And I was considering swapping another H23 in... But now I'm at a stand still. I was wondering If the F22B DOHC is interchangeable with the H23? and if it is can I still use my H23 Trans and ECU? Reason why I'm asking is because I found that the F22B DOHC is about $200 cheaper than the H23, and if I can use that one with no modifications whatsoever, then I'll go with that one. I need help on this ASAP and If I can't figure it out I guess I'll just stick with the H23. Any help is greatly appreciated guys. Thanks

I wouldn't want to downgrade to an F22B but yes you could use your existing tranny but the ECU would be different. What is wrong with your current motor?

Keith

2nrsOfSpringfield · Post by **2nrsOfSpringfield** » Sun Jan 13, 2008 5:34 pm

I would go with the F23.

justme5424 · Post by **justme5424** » Sun Jan 13, 2008 6:33 pm

high miles and the motor is missing some pieces. I've put everything back into the motor, but the last thing I need to do is put a rocker arm on and set the valve lash...One problem...I don't know how and I can't find anyone to help me do it. lol The other thing is I want to boost the new motor, Cuz I think it would be better to run boost on a newer motor than an older one. the old one's got 194,XXX and the newer one will have about 35,XXX to 50,XXX. I really appreciate all the help you keep giving me cuz you are the only one posting replies to my threads. lol and i can't figure out why no one else will. lmao

2nrsOfSpringfield · Post by **2nrsOfSpringfield** » Sun Jan 13, 2008 7:35 pm

the F22/23s have real liners instead of the RMF crap the H series use making them much stronger for boost. Also since the Fs run a smaller bore there is more material between the bores so you get a better seal on the HG. You cant also put forged pistons in the Fs unlike the Hs. From the goals you have stated I would recommend buying an F23 ($300-400) and put your H23 head on it after installing some new stem seals. It will bolt up to your tranny and your ecu should be fine for now.

big pipe · Post by **big pipe** » Sun Jan 13, 2008 8:39 pm

the f22b dohc is the same engine as the h23, the only difference is 1 mm smaller bore, externally they are identical. like they said i would go with the F just for the future upgradability

justme5424 · Post by **justme5424** » Mon Jan 14, 2008 12:38 am

considering everyones thoughts, it seems like the F series is gonna be a better bet for me. With that said and done, what ECU should I get and am I going to have to make any modifications to get the F series engine to work with my H series wiring harness and stock guage cluster? Please inform me of any complications I may come across doing this swap. Thanks again guys.

dc2whore · Post by **dc2whore** » Mon Jan 14, 2008 2:09 am

h23 block with h22 head u will be straight freshen everything up about the same price as a used f22

big pipe · Post by **big pipe** » Mon Jan 14, 2008 3:37 am

if both engines are obd1 your stock harness, and ecu(h23) should plug right up!

justme5424 · Post by **justme5424** » Mon Jan 14, 2008 3:39 am

Thanks, now I gotta find someone to help me do the swap. lol