H23 Delta 272 camshaft issues

[dbsharp]

Ok so I got my head today, and all of the exhaust valves seep a small amount of water, I assume that carbon build up has something to do with this. A couple exhaust valves do a little more than seep and seem to have a slow leak, but not as bad as my intake valves on the f22b dohc do. I am going to put it on and run a compression test to see what kind of numbers I get. none of my f22b exhaust valves seem to leak, so I know there are some good valves I could use there. I need the Honda valve tool. lapping is probably in my future. If I'm lucky, I will be able to get a valve train that doesn't leak or bind and run my cam by the end of the week. I think that milling my head will just further delay my project, so I might not do it, unless I have to. this just might come together.

[sulimed]

gooooood luck. hope it all comes together like you want. i should be put my eng in tomorrow. we'll see if my F22b head will hold up to the 272.

[dbsharp]

thanks for the moral support.

I just read that valve lapping can cause long term reliability issues. some guy had a nice valve train that he claims got messed up a year after lapping the valves. I found this on teamintergra.net or something like that. google search didnt turn up as much info as I expected on lapping the valves. can anyone confirm or deny this? Ive had a few people with a lot of experiance tell me they lap valves.

[sulimed]

i thought lapping was the poormans 3 angle grined or to just get a good valve seat on new valves

[dbsharp]

im thinking maybe they didn't clean up real good after lapping or they had some other issues, because that is the only thing I have found about lapping that claimed major issues as a result.

[HondaFan81]

im thinking maybe they didn't clean up real good after lapping or they had some other issues, because that is the only thing I have found about lapping that claimed major issues as a result.

They more than likely did not do the valve lapping properly. If valves need a little refresh, but overall are in decent shape, lapping is a good option. There is nothing bad about it, it a mild procedure. Getting a valve job is a more aggressive machining process to achieve the same goal, it all depends on what your original condition is. Therefore, if you do not know what your starting point is, bring it to someone how does...a cylinder head machine shop. Atleast for their direction on lapping or valve job being necessary.

[wed3k]

send it my way and ill take care of ya

[dbsharp]

If you lived nearby I would bring it to ya. If I had done this last semester, I would have access to a full machine shop and I would do it myself. my timing sucks

[dbsharp]

I put the 272's in the new head I got. I have binding on 2 exhaust springs and the others are closer to binding than I think will be reliable long term, I am running .010" lash. I am going to mix match my exhaust valves from the two heads and make it work. I will run this cam, because I am not worried about long term reliability, or the head that it will be going into. I think that the h23 regrind has too much lift, and anyone with a stock head they care about should not run it. that is my opinion. I base this off of the fact that with this cam, and valves with the proper install hight, you do not have .100" left before coil bind. In fact I think that the stock cam may have a bit less than .100" at a 410 lift. I cannot verify this. I'm getting a good amount of money here in the near future (>1k), and I have 2 spare cams, and a spare head, and if need be I can borrow a car from the parents. If my situation was any different, I would not run this cam. long term, I'm thinking rebuild my f22b head, get a 262 or a bisi cam, and eventually a 16g. If anyone reads this who is running a 272 on a h23, next time you adjust your valves, try to see what size feeler gage you can slide in the coil when it is at max lift.
Intesting fact:
bisimoto's h23 stage 2 is only about a 410 lift, maybe this is the reason.

[d112crzy]

Are the regrinds you have from an h23 or from your f22b?

The lift does NOT change in a regrind. They don't add material, only take away.

[dbsharp]

from a h23. The lift does change on this cam, the dial gage does not lie, and delta says that the lift on my lobes is right where it is supposed to be. I have measured both stock h23 lobes and 272 lobes and they have different lifts. they ground quite a bit off the back, and probably a only few thousandths off the front just to clean it up. the lobes themselves, between stock and 272 have about .024" more lift.

[d112crzy]

Interesting.

is there a possibility that these are the wrong cams?

[dbsharp]

delta says that the lift is on the lobe is correct for a 272 and it says 272 on the cam. I don't think there is a very big possibility that these are wrong. I think that delta has probably not installed these on a h23, because they grind so many different cams that they could not test them all.

[d112crzy]

Do you have your stock f22b cams? you should measure those vs stock h23 cams and see if they are different.

[dbsharp]

I'm sure there is some difference in the cam, but I can only measure total lift. I will compare that though and report back.