i am having an h22 bored and honed wondering the biggest size bore i can go without sleeving and wat pistons to use any help would be highly appreciated thanks

 

well your sleeves are frm so your outta luck lol you could bore it to 87.25mm for type s pistons but thats pretty much the max, whats your goal??

 

nothing to much just a lil more na power just trying to keep cheap for now have another block for turbo build later or should i just pay to sleeve the block and go 89.mm and run 12-1 comp

 

bore size for a h22a usdm is standard A-87.010mm to 87.020mm (3.4256in) service limit is 87.07mm or (3.428in.) taper is .25mm or .010 in. service limit. distance from piston to cylinder wall .007-.030mm or (0.0003-0.00012 in.) service limit is 0.04 or (0.002in.) does this help? you have fmr sleeves so you have to be carefull what pistons you buy, just any old piston won't work for more info ask the guys in the prelude section.

 

yeah but you can use the type s pistons they are compatible obviously with your h22. i mean if you have a turbo motor, why not just build that up?

 

turbo motor will be a long build so i have decided to go with the sleeves and looking for good but cheap pistons what would be good for that je, wiesco? also wondering about rs pistons someone told me about them but have never heard of them and thank u brianb242 for the info that really helped

 

okay well why dont you work upgradeing other stuff 1st? when building an engine the block being sleeved is usually used with like say a higher cr as well as building the head, as well as better air induction ie: im and tb and cai or itbs and a better header.. why start with the block sleeving?

however i would go with the je's never had a problem yet

 

head already done just bottom end work and trying to figure that all out i have been thinking je looking for 12:1 cr with stock rods and acl bearingsbut i cant find any 12:1 89mm bore je pistons my local shop suggested that ratio but still looking

 

cai is done already tb yes i will end up doing and itb cant do that yet have to go through emmissions i am trying to get an address where i live so i don t need to do that and can go itb it will be funlol

 

oh okay well your better than i thought lol so for the pistons 11.25 seems to be the highest cr so i know you can do stuff do your head to increase the cr more hmm is it a smaller head gasket?

 

not sure on head gasket found some pistons for h23 at 13:1 cr but dont think they will fit other than that i have found 11:1 wiseco or mahle so dont know wat wat to go lol decisions decisions

 

the service limits I gave you are for a h22 and a h23 so as far as the h23 pistons fitting in the bore that will work. I don't have my service manual infront of me (not at work) the only difference between the h23 and h22 is the stroke if im not mistaken, with those 13.1's I think the only problem you may run into is piston to valve clearence

 

Yeah that's wat I expected is there anyway to get around piston slap on that would definitly love to kno anything that will rais the head a lil to stop this from happening

 

Are they stock bore 13:1 H23 pistons?

What do you mean by piston slap? Piston slap is usually a term used for the side to side slap of the piston skirt on the cylinder wall. usually due to larger clearances.

If you want to know how to keep your pistons from contacting your valves. First you figure out how much P2V clearance you want to run. (0.035" - 0.040") Then you clay the piston top to find out how much clearance you actually have. Once you have measured your clearances that is when you figure if you need to increase the clearance with a thicker head gasket or fly cut the pistons. Or you if you need to decrease the clearance, via milling the head, decking the block or using a thinner head gasket.

 

ok i understand that about the piston slap thing u got me on that just how i have called for a while so thank u on the correction ghostaccord and no the block will be bored to 89.00 but what do u mean by claying the piston top and i am also trying to find out without having to buy the pistons for mock up to check clearence

 

OK so you are sleeving the block and going with 89mm pistons. If you want to calculate an approximate clearance without buying the pistons you need to know there compression height and the volume (cc) of the piston top.

If they are not made specifically to fit inside your combustion chamber you could have issues with the design of the valve releifs. That is something you can't calculate without having the piston in the block. Or you can get the specs on the valve releifs, ie the pocket diameter and angle in which they have been cut.

Claying the piston top is the method of placing small pieces of clay on parts of the piston. It is used to measure the clearances between all of the contact points involved between the piston, head (combustion chamber) & valves.

Here is a pretty good link for claying a motor;
http://www.c-speedracing.com/howto/claymotor/clay.php

 

did u look at the mahle gold series pistons? they can work with the h22 stock sleeves just giving advice..

 

yeah was looking at them but i want bigger numbers and more reliable but definetly more hp for the win and thanks again ghostaccord i appreciate the link it was helpful