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should i sleeve it?

 
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Old 12-14-2011, 01:35 AM
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i need help with build..

so i know that with any aftermarket piston at 12.0:1 or above should be sleeved. and if youre going to boost the motor. but in my case im going all motor. so heres the question.. will i need to sleeve my block (h22a4; open deck)
or can i just place in a block guard (mainly to prevent wobble at high rpms) at (compression calculator numbers) 12.08:1? i know i already answered my question so far. but heres a little more info and where it gets kinda tricky... ill be running type-s pistons (11.0:1) with my a4 rods. a milled head to 0.040 inchs, and high compression +0.5mm valves. although i was told i should make around 12.5:1 with all that.

so since im running oem internals do i need to sleeve my block? i know that its always a good idea too. but does the money really need to be spent? or can i just go with a block guard that i already have?




EDIT: dont mind ^all that. already got questioned answered.

but im tryin to figure out if my set will work.

i have a h22a4 block (deck height: 8.643"; 8.669" with head gasket). i want to put a f23 crank in to pump stroke up to 97mm (stroke: 3.570"). with f23 rods (rod lenght: 5.551"). matched with type-s pistons (comp. height: 1.220")

i know its gonna put me at high compression rate. somewhere around 13.0:1 - 13.1:1 ish. but i need to know if it will even work. or will there be bad piston to valve contact.

or what i need to do in order to make it work.

Last edited by jdmcg3; 12-16-2011 at 02:57 AM.
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Old 12-14-2011, 02:30 AM
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Re: should i sleeve it?

You may have to hone the block - depending on the condition of the cylinders, you might even need to go to the larger size type S pistons if the cylinder walls aren't in great shape.


otherwise, if the cylinder walls are fine then you can run type s pistons without needing to sleeve the block.
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Old 12-14-2011, 03:53 AM
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Re: should i sleeve it?

i already planned on having the block honed.. but the cylinders and pistons are both in great condition.
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Old 12-14-2011, 01:01 PM
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Re: should i sleeve it?

Don't forget to clay the piston domes too, just to make sure there won't be any piston/valve interference
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Old 12-15-2011, 12:57 AM
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Re: should i sleeve it?

Quote:
Originally Posted by eludeauthority View Post
Don't forget to clay the piston domes too, just to make sure there won't be any piston/valve interference
Always here for the good advice.
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Old 12-16-2011, 03:59 AM
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Re: should i sleeve it?

please read the top
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Old 12-16-2011, 01:09 PM
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Re: should i sleeve it?

These links should help you research

Piston Clay Testing
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Old 12-16-2011, 10:10 PM
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Re: should i sleeve it?

im not asking about how to clay pistons. already knew how to do that. but thanks anyway..


im asking about f23 crank and rods into h22a4 block.
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Old 12-17-2011, 01:14 AM
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Re: should i sleeve it?

I'm sure it'll work, haven't seen anyone else do it though. Since no one else is chiming in if you already have the parts I would say assemble everything and clay it to see if you'll clear the valves fine. That is a fairly high compression ratio so if need be maybe source a thicker head gasket to lower compression to the mid 12s? All is hard to judge without first doing so. Good luck
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