Myself and a few guys were wondering if s2000 pistons can be droped into an H22? Anyone know?

 

Umm the S2000 piston is 87mm....but why? You'd likely need custom rods..

You could get custom pistons to the specs you want instead

 

Because they are forged and will work with our stock sleeves.

 

Oh I remember. What is S2k compression?

Anyways the S2000 and Prelude have FRM but is it the same FRM? I don't know if I had the block open I would did it right once. But I say go for it. I haven't seen anyone do it yet...anyways what's the S2000 rod length?


[Modified by satan_srv, 8:46 PM 11/22/2002]

 

s2000 has the same rod length..... ill let you guys know soon enough how the s2000 pistons work. im ordering some monday for my h22. im gona put em on the stock rod, i just have to have the stock rod rebushed for the floating pin the s2000 uses. i could use s2000 rods but for all motor regular h22 rods are plenty strong enough

 

Where are you buying them? If you belong to preludeonline.com, come on over and joice the discussion, these pistons could really be a blessing to those of us who are on a budget, but still want to run more boost or juice without the cost of resleeving. Also, anyone who is droping in new pistons, check out swaintech.com, I am going to have it done to whatever pistons I decide to swap in.

 

im gettin em from honda. im not a member of prelude online cause i refuse to pay for JUST a message board. when they offer some better content other than JUST a message board ill pay.

 

11.1

 

they may have the same rod lenth, but what is the deck hight? the rod lenth could be the same, but the pin may be in a different spot on the piston causeing the deck hight to be different...also, what is the cc of the combustion chamber on the s2k, you will need to compare the size of it to the size of the h22 to find out what your comp. ratio will be...let us know

 

Why dont you get Type S piston from a H22a..and just take some off the head a little?????That would work alot better i would think.....

Thanks

 

type-s is just high compression h22 pistons, supposedly the s2000 are some new forged ones that will work in a frm block

 

this is fun......who cares if it's some new forge piston..Why make it hard on your self to find out if it works or not?Just go with Oem h22a type s piston we all know that will work...Right????

Thanks
Ross

 

your name, allmotor is the reason you dont care, but all h22 people that run any kind of fi knows that the ringlands are the first to go, they also know that you cant run conventional forged pistons in a frm sleeved block w/out resleeving...this way more boost less money


[Modified by fastludeh22, 3:09 AM 11/23/2002]

 

type s pistons run around 350-400 with rings, i can get s2000 pistons for 1/2 that. almost all honda's share the same pin height... hell i know people with f20b pistons in b20vtec's.

as for the combustion chamber cc's i dont know, i dont have access to these specs. i have seen pics of s2000 and type s pistons and they look about the same with the s2000 possibly having a bigger dome. im gona run the thinest cometic headgasket i can find and have the block o-ringed. im not milling the head just yet. i am getting skunk high compression valves for the intake side. in the end im quessing ill have around 12-12.5:1 compression. with the custom intake manifold and header im gona make that should put me a little over 200 to the wheels

 

Well i'm not u sure about that boost more part. Since the s2000 piston has that 11:1 cr.

 

Very interesting, I know S2000 pistons are forged but they have a special coating that would allow them to work with frm sleeves.! Let us know how they work. Like everybody else I'm curious about the actual CR.

 

well theres 2 things about boost w/these. 1. we dont know th cc of the s2000 combustion chamber, so it may be less c/r on the lude, 2. even if its not and it is 11:1, n2o loves high compression. so maybe not boost as in turbo/supercharger but defentilly juice

 

regardless if they are coated or not, there is a special honing process that you must go through with the sleeves in the h22. as long as you hone it properly you can run any piston. the process leaves the bore perfectly smooth, no crosshatching at all

 

i am very interested in the s2000 piston result...please let eveyone know asap...i hate to sound like a cheap ***, but i don't want to resleeve my block in order to bump my compression where i want it to be on an all motor h22...

james

 

Okay #1 if you're boosting on a budget you gotta a problem.

#2 Who said rod length is the same? S2000 rod is something likwe 152-153mm vs H22 143mm....but if you are assunming that the pistons has the hole at the same height you are okay.

The other thing someone mentioned was the combustion chamber volume of the S2000. if you put these pistons in your H22a will definitely not be 11.1:1 compression...given the S2000 is a 2.0L I'm thinking compression will drop. https://honda-tech.com/zerothread?id=335357 for instance H23 pistons in H22a are more like 9.5 than 9.8. It may be less than a type-s piston...but I might be worried about valve clearance anyway...


[Modified by satan_srv, 11:24 AM 11/23/2002]

 

the f20c has alot in common with the h22. where are you getting your rod lengths?? i had a guy measure his s2000 rods, i know its not the most accurate but 10mm off is alot and im sure he wasnt that far off. in all probability the s2000 combustion chamber is larger to accomadate the larger valves it uses and to allow for greater quench area, a must for a factory car to run 11:1 and 9000 rpms. i will find out soon enough tho. 11:1 compression sould result in 250psi+ in a compression test. my h22 with the stock 10.6:1 pistons made 235 b4 i killed it. we will see.

 

Really, mine made 255 psi across the board (cyld #3 made 250psi). Maybe I have lot's of carbon deposits in my pistons . Anyway in my opinion, S2000 pistons would increase the compression on a H22A, assuming they are the same size (not talking about bore). Also the valve reliefs should be bigger because S2000 should have bigger valves and higher lift cams than an H22A. Of course I'm just speculating I could be totally wrong. Keep us updated!

 

I'm Extremely curious on this setup... i'm going all motor h22a aswell, and just posted about rods.. because I want an h22a to rev to 9000rpm safely.. I have Drag profile N/A cams and headwork so i need to know about this mod, because it looks promising to say the least.

if the results are in but for trade secrets they don't want to officialy post the results i'll gladly pay for the info if a price is issued.

thanx and keep up the great work !!

 

why not get some wiseco, JE, or Arias pistons then have the skirts coated? the skirt coating is the only difference between S2000 forged and standard forged pistons.

 

How much is Honda charging you for the S2000 pistons? Also, is my local speedshop going to be able to bore out the cylinders properly? If S2000 pistons work out, alot of nitrous guys will be very happy. A stronger bottom end without spending a ton of money.