i am going to put some f20b cams on my h22, is there anything that i need to change or can i just drop the cams in and not worry about anything???

 

I wouldn't do it because I've heard that they're the same spec as the Type S cams which will eat away the rocker pads. There's a thread on here about that issue. Something on the USDM head that causes this which I forgot. Just a heads up man.

 

Could it have to do with the altered valve angle in the type S head? Maybe the rocker arms are slightly longer too? But yea i have also heard that it causes excessive wear on the rocker pads and the cam lobes.

 

You're right. In the USDM head, the rocker pads sits higher than the type s head; therefore, the aggressive cams ate the rocker pads wearing them out quick.

But, I heard some ppl using them with no problem though; may be due to using a JDM head? because I've heard that JDM H22s have aggressive cams than the USDM H22s(Don't quote that on me though) I don't know. Just a thought.

 

So you guys argue about the increased rocker wear huh. Have you guys thought about the effects from even more aggressive cams like some Pro 2's or 3"s? The rocker wear isn't from the slightly more aggressive cams; for the most part anyways. Do a search on the H22 rocker arm wear. It happens with OEM cams as well.

 

Why are you puttin f20b cams in your h22 anyways? The automatic version of the f20b uses the same cams as a h22. The 5spd version uses the type s cams.

 

True, I've seen a few pics that showed how the stock cams eats away the rocker pads as well.

 

No one even mentioned using plastigauge to check oil clearance. Wow.

 

Hmmm I would have thought that increased cam lobe to rocker pad contact (ie more aggressive cam profile) would increase wear, for the most part anyway.

Yes, naturally rocker pads wear on a stock motor (which is partly why valve clearance/lash goes out over time), but its not just the pads that wear, the cam lobes wear too. Cant expect anything less from two metal components colliding at a high rate of speed for many km's (with oil to lubricate).

The real debate is whether there really is a significant rocker arm length/height/position change on the type S engine (JDM) to accommodate the more aggressive cams. I know that the newer P5M heads have altered valve seat angles (from 60' to 45' or something of the sort) to enhance air flow, that might change the position of the rocker pads, which could also be why there is enhanced wear on the P13 head's pads with type S camshafts. Any one able to shead some light on this?

 

From what I've read, the rocker wear issue is due to less zinc being in modern oils(I think it's zinc). But their's not any solid proof yet. Also, the increased lift/durantion will wear out your rockers faster, but not as bad as you guy make it out to be.

Why would their need to be more room on the Type S head? Like I said, people run ALOT more aggressive cams in their P13 heads.

 

less zinc. now thats cute.

 

http://www.crower.com/pdf/honda_installation.pdf

 

if you go to the all motor thread this matter was recently brought back up after being dead for some time. and yes zinc does help fight wear on parts. bisimoto makes some improved rockers for h22s. and i believe endyne also has their own treatment for h22/b18 rocker pads

 

yea...that was me doing cpr back there

 

lol.... i didnt even realize that was you man. its good that somebody else is trying to keep the thing going. one of these days we'll get to the bottom of this problem. when i have my engine done and running with new cams, i will probably pop the valve cover off once a month just so i can monitor any irregular wear.

 

those it matter that its a jdm H22A?

 

Proof reading owns you. All H22's have the same rockers so...

 

why is it that usdm h22s pull 190hp and jdm h22s have 200hp???

 

higher octane fuel is used in Japan, therfore the tune is more aggressive in the JDM ecu.JDM H22s do not have more aggressive cams from the factory contrary to popular belief.

 

not to mention better pistons

 

Higer compression pistons(10.6:1 vs 10.0:1)
different ECU

That is all.