So here's the problem: I ordered a JDM h22a engine off of my mechanic, as my stock h22a4 in my 5g prelude blew. I towed my car to his shop and when I got here, he said that they ran out of that engine, and instead they shipped him the f20b. At first I had never heard of this engine, but he said that it made more horsepower than the h22a and it was a much better engine, and he'd give it to me for the same price. I said okay, yet was skeptical. I went home and researched the engine, and found out more about it. Yes, I know if it came off an SiR then it only makes 180hp, and manual makes 200. I went back to him and called him out on it and he said he made a mistake, that this engine only makes 200 at the crank. And I said great, now he's telling the truth. So I said, okay, this came off of an SiR-T, correct? It has the type-s cams? He said that it came off an automatic type-s euro spec something blah blah blah (he's hard to understand, English is not his native language). So I said, okay so this is only making 180 at the crank. Again he insisted that it makes 200 at the crank, even though it came off of an automatic tranny. The engine does look in excellent shape through, almost brand new.

Here's my question: Is there some really rare engine out there in Europe where an automatic f20b was still manufactured with the larger throttle body and type-s cams, and when attached to a manual tranny will be able to make 200 at the crank? (Yes, the f20b will be bolted to my 5 speed h22 tranny).

 

good luck finding parts for that motor if you ever rebuild it.it is a nice one though. if your was automatic ,its only gonna be 180hp at the crank,I think.It may depend on the ecu thoughso a manual ecu may give it a little more cause those cams in yours are supposedly just jdm h22 cams.

 

I believe that if you plan on keeping your car auto that you'll have to settle for the measely 180. If you want to switch it to a manual then you'll gain the additional hp. As far as ECUs go. You can use the p28 found in the prelude and get it tuned. You can chip it too if you like. I assume you know how to convert an auto to a manual, but if not just take the flexplate off and find a flywheel and you should be good.

 

As a side note, I am currently looking into this swap myself. I am swapping out my f22 SOHC non-vtech for this motor. I havent been able to find too much on it though. SO unfortunately mine will probably be a learning experience and trial by error. Any other questions?

 

The f20b has less tq then the H22. I did a swap on a 4th gen, cool bluetop and it rev'd to 9000. But it didnt pull as hard as the H.

 

Yeah there really isn't a lot of information on this motor. It's very rare here in the states. And yes I'm going to be using a 5 speed h22 tranny, so maybe I'll make some of that horsepower back. I'll also be using my stock h22a4 ecu.

Which actually leads to another question: Do I have to get my car tuned to hit the rev line that the f20b makes? Or can my ecu already rev that high? I think the highest I hit with my h22a4 was like 8500 rpms before I hit fuel cutoff. So will I be okay?

 

A stock F20B makes power in a similar RPM range to that of a H22. There is a lot of information about the motor, and it's not really that rare. It's pretty cheap because of the low demand for it.

 

Oh hmm that's interesting. I've just recently converted to driving Honda cars so I'm still learning about all their engines, so that could be why

 

Chassis code of the Accord / Torneo it came out of is "CF4" so if you're looking for information search CF4 Torneo and you should be all good.
As you said Prelude 5g00 - Automatic version of the F20B doesn't have the Type S Cams or the larger throttle body limiting it to 180hp (as to not blow apart the weak tiptronic auto thats mated to it)
If you're mating it to a manual trans I would advise on getting a set of decent cams and maybe a Roskoracing Euro R inlet Manifold / Throttle Body for it and maybe for a couple of extra ponies tuning it with an Apexi Neo or the likes.

 

Alright thanks for the advice guys, much appreciated.

 

If you use the stock ecu. You will save alot of grief by using the H22 upper manifold plenum (keeps hose routing the same) and You also will retain the stock idle system including the 2 wire IAC instead of converting the F20b's 3 wire IAC. Also swap out the H22 oil pump to fit the F20b, for the proper CKP sensor.