I can't remember if this combo works? Or should i just stay with stock rods.

 

get a stock rod size in an Eagle and it will work just fine.

 

they make more than just one size for the H22. Umm, i didn't know that. Do you know any numbers or anything i should look for to make sure that they are the stock rod size.

 

Actually I heard that the Type S pistons will not fit on 99+ H22's. Some have fit, some havent. This may cause the Eagle rods not to work either. Just FYI.

 

the type s pistons will fit the the 99 and up usdm h22a blocks.Just make sure that the shop who hones your block knows what the hell there doin!!

 

I've been told H22 blocks cant be bored. How many of you are using Type-S .25 oversized? How'd you get them to fit?

 

Im using Eagle ESP rods and Type-S pistons, the bushings on the rods will need to be redone by a machine shop, (due to tolerances i believe).

PS.. there are 2 types of pistons used.. the A size piston and the B size piston check your block configuration it is stamped on the block mine is B-A-A-A each block is different.


[Modified by DarkJedi, 12:34 AM 10/17/2002]

 

So the Type-S piston have the A and B also like the US H22A do? Cause mine are all A's.

 

I am planning to use oversize Type S pistons on stock rods. A local machine shop will bore/hone the block for the oversize pistons. My question has to do with the wrist pins. The Type S pistons have retainer clips for the pins, but the Helm says that the pin is a press fit into the rod, and the pistons I removed did not have the clips. So is the Type S pin incompatible with stock rods?

 

The type S piston uses a floating wrist pin design. The easiest way to "fix the problem is to bore the hole out an almost unnoticable amount and the bearing will move in the rod and on the piston. That's what I did and 8K miles later I still have no probs.

 

Thats what I mean.. I've always heard that the block cant be bored... nor honed. Lots of people on this board say it cant be done.. yet you say your doing it. ?????

 

stock rods with type s pistons. the stock rods aren't the weak point. if you're staying n/a they will hold up fine.

for all you guys that have a shop do the .25 overbore type s pistons, make sure you read the helms. there's a special procedure for honing the h22a block. special material needs to be used.

 

Why would honda sell "oversize" pistons if the block can't be bored out some? Check the Helm. You are probably thinking of people saying you can't use forged pistons. Or maybe you are confusing the FRM liners with nikasil or some other coating like motorcycles often use. The FRM is relatively thick. You could probably not bore it to 90mm, but the oversize pistons are only .025" oversize, and the FRM is .100" or more thick.

About the rods, what if I press in the pin as usual, and also install the Type S retainer clips as backup? Does the pin need to "float"?

About the boring, I have the helm and the boring/honing procedures. My questions have to do with what the helm does not cover: type S pistons and the floating wrist pin. Thanks...





[Modified by flyrod, 5:48 PM 10/24/2002]

 

I was looking into putting some type S pistons into my H22 and found that you can only use the type S rods with the pistons because of the wrist pin it uses.
A couple of my friends convinced me to go back to my turbo set up. There's nothing like the sound of that turbine spooling up!

 

 

probably to compensate for imperfections at the factory,

piston diameters on my (new) type-S pistons:

'B' size = 3.4245 in
'A' size = 3.425 in

my block is B,A,A,A
so my #1 cylinder is smaller than the rest. you will see a stamp on the block and also a stamp on the piston, the A pistons will have no markings and the B pistons will have the letter 'B' stamped on it..

 

So Honda does make a A type and a B type Type S piston?

 

just a word of caution.. i've read in quite a few articles to be careful with titanium alloy parts as they tend to "attract" metal or something. The forged aluminum or stamped steel (whatever the heck it's called) are the best ways to go, and titanium parts should only be used on an engine that is rebuilt often, because the titanium parts will actually i guess "bond?" to the other parts and cause all sorts of problems

 

Yes they do but im not sure where u can get one, i ordered a standard set for myself then i realized the required configuration.. found someone on the boards who was selling the type-S pistons and he was willing to do a trade on the B for an A piston

 

damn, I just had my type S pistons coated at swayne coatings, I had no idea there where two different sizes. Hopefully my engine builder can figure out a way to run proper clearances.

 

I remember this thread but it took 10 minutes to find it. The search really sux.

Anyway, here is some real actual tech info for this thread: The eagle small end is .866. The type S pin is .864-.8645. This leaves about .002 clearance which is excessive for a wrist pin. Honda says .0005-.0009 at any rate. If eagle can't supply a .865 small end, then I guess the next option is to use a stock pin (.866) and hone out the rod and piston for the right clearance. Basically this is not a drop in situation. Now the question is whether anyone will be able to find this little nugget of info...

Oh and with the pistons, there are three options: A, B, and oversize. Also, the "25" over pistons are actually only 10 over. I guess the 25 refers to .25mm, so your machine shop will not like you for making them try to bore .005. They will probably try to hone it the whole way.



[Modified by flyrod, 5:26 PM 11/21/2002]

 

yeah, right. LOL

My vote is for "clueless."

 

Umm. What are you replying to?

Anyway, I talked with eagle, and I guess all the H22A4's also have the smaller wrist pins. I am having the rods re-done, all for .001". What a pain....

 

i have eagle rods with type s os pistons...they work are just fine...my friend who did my motor work just sent it to a machine shop that he uses in Baton Rouge and told them what he wanted done. they knew exactly what to do to make it fit with the proper clearances..so just find someone that works with honda blocks a lot to do your work.