will type s oversized pistons fit on a h22a1?, or would i have to do some sort of modification? i would also need the wrist pins right?

i've read that the type s pistons only fit on the h22a4? is this correct? and if so what would i need to do to make them fit my h22a1?

and is there a differance in performance between the standard type s vs the oversized type s?

i've already searched through a bunch of thread and have not found any clear answers.
any help would be appreciated.
thanks in advance.

 

oversize is oversize so no they wont fit without honing.

 

Oversized Type S pistons will fit any H series motor as long as you bore it out and hone it to match the proper size.


H22a4 and h22a1 have no differences as far as pistons are concerned.. Its the crankshaft thats a bit different.. 50mm vs 55mm mains...


Performance differences in the oversized vs standard.. minimal... mainly used when scarring on the cylinder walls has occurred as a possible way to fix the block and still use stock pistons... Its a difference of .25mm or less.. 1/4 of a mm... very very very small...

Wristpins... yes.. You my as well buy a combo sold that includes pistons, rings, wristpins...

 

thanks to all

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JTCdudeman &raquo;</TD></TR><TR><TD CLASS="quote"> H22a4 and h22a1 have no differences as far as pistons are concerned.. Its the crankshaft thats a bit different.. 50mm vs 55mm mains...
</TD></TR></TABLE>

wow, and i thought floating vs. pressed wrist pins would be a difference....

h22a4 rods/pistons are floating, h22a1 are not, to put type-s pistons on h22a1 rods, you will have to have a machine shop modify them to accept the floating pins, or, you can get h22a4 rods that are floating and install in your h22a1 motor

also, h22a1 have 50mm mains, as well as the 1997 ONLY h22a4, the 98+ h22a4 have 55mm mains

 

heh.. i overlooked and oversimplified it...

To tell you the truth though, the modifications needed are actually non-existent to make the wristpins fit...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JTCdudeman &raquo;</TD></TR><TR><TD CLASS="quote">

To tell you the truth though, the modifications needed are actually non-existent to make the wristpins fit... </TD></TR></TABLE>


please explain

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JTCdudeman &raquo;</TD></TR><TR><TD CLASS="quote">heh.. i overlooked and oversimplified it...

To tell you the truth though, the modifications needed are actually non-existent to make the wristpins fit... </TD></TR></TABLE>

the modifications do exist, im not sure exactly what needs to be done, however most machine shops would tell you its not worth it and to either buy new aftermarket rods or find some used ones that the floating pins will work with

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by twistedbydezign &raquo;</TD></TR><TR><TD CLASS="quote">wow, and i thought floating vs. pressed wrist pins would be a difference....

h22a4 rods/pistons are floating, h22a1 are not, to put type-s pistons on h22a1 rods, you will have to have a machine shop modify them to accept the floating pins, or, you can get h22a4 rods that are floating and install in your h22a1 motor

also, h22a1 have 50mm mains, as well as the 1997 ONLY h22a4, the 98+ h22a4 have 55mm mains</TD></TR></TABLE>

i knew there was something that a machine shop had to do to make them fit.
i thought they might just press right on but after searching i found a thread or two that mention it only working on the h22a4.

good to know thatnks for all the info

 

Because the sleeves are made of nikasil, it's hard to find a shop that will bore or hone an H22 properly (at least in California). When I get my car back, I'll be running OS in an H22A4.

 

Well... Currently have h23a1 rods with type S pistons attached to them in one of the cars. Wristpins are a tight fit, but they press in easier than normal pressed ones...

If I said thats not the only motor I know of or built using a1 rods and floating wristpins I would be lying...

The rods are too thin on the upper side to realistically cut on without tempting fate and messing something up... It can be done and its only .05mm that a shop normally wants to take off.. Because its such a small section to take off its just as easy to press fit them in...

I know all the here say about the modification, as I read it before and at one time believed it... After all the time and work at the machine shop I've put in and talking to the creator of hondaprelude.com who worked at a machine shop locally for several years I understand exactly what the whole deal is between the two rods and how unnessecary it is to do anything to change them for a looser fitting wristpin.....


So, take that information as you will... believe it or not... Ive got one motor running currently with originally pressed wristpins running floating wristpins w/o any modiifications sitting at the house... Thats not here say and neither are the other 2 I advised and had done locally...