F22 to H23a1 Swap - Honda Prelude Forum

King0fShadows · 03-22-2009, 12:11 PM

What are the differences besides f22 is SOHC and the H23 is DOHC. Both non vtec btw.

I have the f22 in my 92 now and an h23a1 in the garage. So do the motor mounts match up? If so what are the performance differences?

Which would you go with?

h22jdmvtec · 03-22-2009, 12:19 PM

put the h23 head on the f22 block..

King0fShadows · 03-22-2009, 12:22 PM

Will that even fit? The f22 is like half the size?

h22jdmvtec · 03-22-2009, 12:32 PM

yeah its been done before...its called the g23 or something like that.. search it up on google and on prelude online..

darkstar67 · 03-22-2009, 03:41 PM

uhm. f22 is rated at 130 hp vs h23a1's 160 hp. and thats not even to the wheels. screw head swapping. goto a junk yard and spend 600 on an h22. h22= 190 hp. and 7500 redline instead of 6500. but if you wanna get like 35mpg, stick with the f series. i had a f22 (matter of fact its in my garage) but i have a h23 now and i wish i would have spent the extra 200 dollars for the h22. h22 have soooooooooo much more aftermarket support than the h23 and f22 combined. i swapped from f to h with out any modifications except for the ecu swap.

King0fShadows · 03-22-2009, 05:08 PM

Well the reason I was going to go with an h23 is because I already have one. lol Dont have money to go buy one. Need to blow that on a turbo....

mooncaller · 03-22-2009, 05:26 PM

Umm... this may go off topic... but... just how much do you plan on boosting on a stock H23 block? And how long do you want this to last? How reliable do you want it to be? Think about this carefully... dropping a stock H23 and then putting a turbo on it isn't exactly going to be healthy for the engine... there's an awful lot of research you should do before taking this on.

- Corey

darkstar67 · 03-22-2009, 07:00 PM

sell the f22 and the h23 and maybe buy a cheap h22.
sleeve that h22, run lo co pistons, stronger rods, then comes head work, after about 2 grand of engine work and supporting mods, then you can turbo safely to about ten pounds. thats reliable. reliability is DEFFINITLY not cheap. turbo on a stock motor wont last you more than a couple thousand miles if you run more than 3-4 pounds.

minilogoguy18 · 03-22-2009, 09:25 PM

If you're gonna boost keep the H23a1, it already has low enough compression and better bottom end power than the H22a to get faster spool. People boost the H23a1 with great results, the H22a would wear out faster anyway, high rev+boost=boom. You can run a stock H23a1 on 6 psi daily and it should hold up as long as the motor is in good shape and you don't have a lead foot.

cifer6425 · 03-22-2009, 11:44 PM

you could go with the H23 and it would be better than your F22. However think of this. How much money would extra would an H22 be? Yes i understand you have the H23 just sitting around, but if you sold it and the F22 how much extra would you need? Is that price less than the price it would take to get the H23 to 190 hp? What i am trying to say is that its probably the best bang for your buck to get the H22 that already makes 190 hp then to boost a h23 that is starting out 30 hp less.

just food for thought.

King0fShadows · 03-23-2009, 10:36 AM

Quote:

Originally Posted by minilogoguy18

If you're gonna boost keep the H23a1, it already has low enough compression and better bottom end power than the H22a to get faster spool. People boost the H23a1 with great results, the H22a would wear out faster anyway, high rev+boost=boom. You can run a stock H23a1 on 6 psi daily and it should hold up as long as the motor is in good shape and you don't have a lead foot.

Thank you all for your reply.

I think I am going to do that. Because that goes along with everything I have been told.

Quote:

you could go with the H23 and it would be better than your F22. However think of this. How much money would extra would an H22 be? Yes i understand you have the H23 just sitting around, but if you sold it and the F22 how much extra would you need? Is that price less than the price it would take to get the H23 to 190 hp? What i am trying to say is that its probably the best bang for your buck to get the H22 that already makes 190 hp then to boost a h23 that is starting out 30 hp less.

just food for thought.

Thanks for your reply as well. The problem is I dont have the cash and I cant have a car without an engine right now.

Also I am pretty sure the h23 is modified. It looks like it has some performance upgrades as well not 100 percent sure though. I had a body that pulled it from a tuned civic and gave it to me.
Heads painted and everything.
Lol could have just been a hardcore ricer and just painted it

King0fShadows · 03-24-2009, 10:57 AM

Any other input?

minilogoguy18 · 03-24-2009, 11:07 AM

If you're gonna build a turbo motor do it right, don't just buy a bolt on kit and throw it on the stock motor, it wont last. Toss the F22a1 back in the car and keep daily driving it like that and refrain from putting any bolt-ons on it to keep ricers off your ass. In the meantime build the motor correctly so that it can withstand a decent amount of boost without it blowing up. Start digging through the FI forum cause you got a lot of work ahead of you.