Okay, I have a spare H23 motor, and i'm buying an H22 complete motor w/ a hole in the block. It only had 40k miles on it before it blew. anyway, I'm getting the whole motor because I know I will need alot of parts for the conversion other than just the h22 head. I will be replacig my H23 block's rods & pistons w/ high compression pistons & forged rods (running it n/a w/ a 75 zex shot). I will be replacing valvetrain parts w/ Either Ferra valves, springs & retainers, or crower units. I'll be running the stock cams for awhile, 'til I can afford to buy a performance set after the initial build. My questions are:w/ running high compression pistons (possibly 11.5:1), and running a 75 ZEX shot of nitrous, would it be necessary to sleeve the block? if so, how much does this process cost? the second question...Should I replace the H23 crank, ro just have the stock one balanced to prepare it for the higher rpm? I will be installing the H22's oil jets so it will be more apt to withstand the 7800 redline.

 

i think the h23 crank is gonna give you problems on the way to 7800.
it will probably work for a while, but u may spin a bearing
see what you can do about getting the crank cut/polished and balanced at a local machine shop, and of course you will need new bearings either way, especially if they need to cut it.

u will need the h22 oil jets
and oil control orifice to go between the head and block.

there are a few people around here who have done this

running 11.5/1 CR will mean 93 octane and that may not be enough on a hot day. you will also need some big cams to breathe 11.5 CR, but im sure crower stage 2 will cut it. make sure you change your piston rings and valve stem seals.

~kris

 

Lude Bloom in the HOUSE

hey while ur at it Sleeve that block, put some JE pistons and some aem cams in that puppy while the block is open

 

Golden Eagle just built my h22 with sleeves and that compression was used with JE's. It will be done on the 30th of this month and the head will be done in ten days and I used crower stage 2's I'll let ya know, I'd personally ditch the h23 everything if you've got the money to sleeve a motor!!!!!

 

yes, but see, i don't have an extra grand lying around to have the block sleeved, so I was asking if the block will hold up alright w/ the setup I will be running. I have been hearing that 11.5:1 compression pistons are going to be really high w/ out sleeving it & runing a 75 shot of nitrous. What compression would you guys recommend? If I dropped the shot of spray a little bit, could I run the 11.5:1's? how much of a power diffrence would I be looking at between those & other compression ratio pistons?

 

if your gonna run juice with 11.1 comp. you better run more than 93 octane.

 

honestly=probably not
the block probably wont last very long with the intended setup, the pre 98 h22a block is probably the most solid as far as balance goes, but the FRM doesnt like forged pistons so also keep that in mind. Sleeving is really necessary here...i know its more money, but in the long run its better.

~kris

 

you'll need a lot more than a grand after the unfortunate happens with an incomplete build. i side with ludeboom here. i've seen, heard about, and read of many 2.3vtecs that have fallen in my day. fortunately im among the living

 

by the way i haven't been around for awhile. can someone point me to a write up on using the oil jets w/ 2.3vtec...i've never had them in my build. other than bending the jets in hope that they shoot correctly i'm not sure how people are using them.
thanks
v

 

any answers to the other questions I asked in the last post? What would the highest compression pistons be that I could safely use w/o sleeving the block? what kind of potential power diffrence would there be?