jpkl

What is the different between H22 and F22, and some with an A at the back, does it means it is auto ?

Cementups

H serries are DOHC and F series are SOHC

boomslang

Not all F series are sohc. The F20b is the dohc Accord type R motor.

Conechaser

ATR has a H motor in it

Gabe

Correct the Accord SiR uses the F20B. The F20C powers the S2k so not all F series motors are SOHC. As far as differences I really couldn't say (besides the SOHC/DOHC and VTEC head). There are a bunch though.

Gabe

boomslang

The F20b is more or less an H22 with a shorter stroke and different intake manifold.

Gabe

I wouldn't think so. They have engine series designations for a reason. If it were an H series motor (like a destroked H22) they would probably call it a H20.

Gabe

0Import RP

iTrader: (7)

I thought the Number was the size of the engine. Like 22 = 2.2 litre and 18= 1.8 litre..etc. but I could be wrong.

jpkl

Yeah I was thinking of putting H22 in my EG, but 2 out of 3 engine mounts used are suicide... 3-4 mm gap between engine and radiator is also another sucide mission

Gabe

OK, according to your theory then the F22 (4th gen prelude and accord engine) and the H22 would be exactally the same block except for designation since they have roughly the same displacement. I happen to believe that the F20 is a totally different block than the H22. I'm sure a lot of the geometry is the same and that's why the r/s ratio is the same as if you were to destroke the h22. I mean there are only so many ways to build a 2.0 L engine and I don't think honda would come up with an entirely new engine geometry that is totally different than what they already make.

And the "F" series is not the accord only motor designation. The prelude has used it and the S2k does use it. Yes more accords have the F series motors in them but that does not make the F series exclusive to the accord.

Gabe

Gabe

And BTW I'm pretty sure most people (at least those who know anything about hondas's) know that the number in the engine designation stands for the displacement.

Gabe

boomslang

The F20b and H22 share the same head. Multiple people use an F20b intake manifold on their H22.

The F20b uses an H22 block.

accordsir_h22a

InlineFour. If your theory about the F series motors being only in the Accords, and H series being only in Preludes, then why was the 94-97 Accord SiR equipped with an H22A engine in Japan? The current Accord TypeR and EuroR are also both running the H22A engine. The F20B is a newly designed engine for the current generation Accords in Japan. I will have to agree with Gabe on this one.

JG Luder

which H22? A1 or A4?

boomslang

Yes, older ATRs had the H22. New ones have the F20b.
http://asia.vtec.net/article/CF4/

boomslang

Well lookie what I just found.
http://members.tripod.com/infinitemotorsports1/id44.htm

So who is right now?

Gabe

So your going to base your assumption that they are the same block on some guy's website where he has a motor for sale? Kinda sketchy if you ask me.

I don't know for sure that they are not the same block, but I don't know for sure that they are either. All I do know that honda has engine series designations for some reason and usually engines with different series designations are not the same, even if they have the same displacement.

Gabe

G

If there is anyone with helms on the f20 equiped Hondas, we could compare crankshaft measurements and such...... That may help. As far as I know, compatable motors have the same letterred designation....

boomslang

I'm finished. I don't want a flame war.

accordsir_h22a

There is no such thing as an older ATR. The ATR that's out now is the first and only Accord TypeR there ever was. The SiR, SiR-T and SiR-S all have different levels of the F20b engine. The 5th gen 94-97 Accord SiR Coupe and Sedans, all came with the H22A1 I believe JG, but I'm not sure. I know the Coupes had 190hp(only automatics, yuck!), and the sedans (5 speed) came with 200hp in the 5th gen. I'm not sure which version H22A the TypeR and the EuroR have, but I would imagine that it's the same as the Prelude TypeS. They all have over 200hp. 220hp for the EuroR and TypeS, and 212hp for the ATR. Check these 5th gen Accords. http://www.eva.hi-ho.ne.jp/toco/photo/index.html Check out Saito's web page, he has a good run down of the SiR.


[Modified by accordsir_h22a, 3:04 AM 7/6/2001]