ok so i found a killer deal on an h22 i plan on buying. the guy was origanally going all motor and had the block cut for 90mm pistons, but hadn't had the sleeves pressed in yet. i was going to do an na/n2o build up, but then i decided that the amout of power i want and the amount of time ill want it im better off going w/turbo, dont need to be refilling everyday.

so i guess that leaves me w/a few questions
1. can i sleeve this block to accept smaller pistons for a turbo setup? and will this make it any weeker?

2. if not, w/good fuel mgmt could i run a turbo and 90mm and not have it blow up in 2 months?

3. if i go back to my na/n2o build up can i run high amounts of n2o (150+) w/this size piston, and again not have blow up on me in 2 months?

thanks for all the help
-Vinny

 

the larger the bore of your piston, the more displacement you will have. How much overbore is this then stock exactly? You will most likely have to have a custom piston made for this application if they arent readily available, and this will run about 600 bucks through race engineering if you get JE's. With proper tuning and fuel management you can always boost a motor, just depends how much you want to run. as far as accepting smaller pistons, youll have to buy a new set of sleeves, install them, then rehone the walls again. basically, this is a waste of money and the outer layer of sleeve will be extremely thin so i wouldnt really trust it, you would be better off buying sleeves and sleeving out your current motor. But let me get this right, he has the block's cylinders already honed out for the installation of the new sleeves? Or is the current stock walls a 90mm overbore? Im confused what you are saying, just know that you can overbore stock prelude cyl walls.


[Modified by GudeH23a, 3:14 PM 8/13/2002]

 

I am just as confused. The stock sleeves should be ground out for te respective new sleeves, and they are what gets bored to your piston spec. Something sounds fishy, I would check into it further.

90mm is very big, my block is 89mm and that is the highest Golden Eagle reccomends, although others have done it; including Brandon aka gsr*lude. Is it risky? yes. It was just not worth the extra 1mm in my eyes.

Boy I sure hope I get my block this week.

 

ya i wouldnt go 90 mm eathier, this is how he put it, he has the block "cut",(his words i guess he means bored), he was getting sleeves put in for 90mm pistons but stopped the guy before they were put in, cause he ran out of money. what makes it even more fishy is that he said that the guy will put in the sleeves for $250 on top of what he has already spent, that seems low to me. then all that would need to be done is deck it. if possible i want sleeves put in for like 88 or 89mm cause i want to go turbo and i want it to be able to hold the boost.

btw- what is decking a block, and i heard of o-ringing insted what is the good and bad points of each

 

FYI I believe Wiesco Has off the shelf 90mm H22 pistons...$500~$550? I think?

 

btw- this is a pre-96 h22, so its closed deck if that matters. and what is the stock bore?

and ya the pistons that come w/the deal are wisco

cant i just get thicker sleeves w/smaller inner diameter?

 

Closed deck and open dekc won't affect sleeve diameter. Stock bore on the H motors are 87mm. You could resleeve the block and get back the 87mm I believe... not sure. Try asking GE if that is possible.