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1200 conversion head gasket

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Old Apr 3, 2020 | 01:27 PM
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Default 1200 conversion head gasket
I'm converting a 883 using a KB 1200 +20 piston kit. Having my original cylinders bored / honed and installing my original 883 heads. Are 3.50 head gaskets the right ones for this?
 
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Old Apr 3, 2020 | 06:45 PM
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yes but you might want to re-think using KB pistons,,if you do use them make sure that your machinist is aware of the required clearances with them.
m
 
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Old Apr 4, 2020 | 06:26 AM
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Originally Posted by marcodarq
yes but you might want to re-think using KB pistons,,if you do use them make sure that your machinist is aware of the required clearances with them.
m
i agree,KB = KA BOOM
 
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Old Apr 5, 2020 | 12:18 AM
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Originally Posted by marcodarq
yes but you might want to re-think using KB pistons,,if you do use them make sure that your machinist is aware of the required clearances with them.
m
Thanks, marcodarq. The machinist is well versed in performance work. I know that one of the advantages of the KB pistons is the ability to operate on lower clearances. So, I was planning on providing the specs when I drop off the pistons and cylinders. I was sure that the 3.50 would be correct for the head gaskets. My concern was that the .020 over on a cylinder size might make a difference in head gasket. Just thought I would ask.
 
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Old Apr 5, 2020 | 07:33 AM
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Originally Posted by sporty4spd
Thanks, marcodarq. The machinist is well versed in performance work. I know that one of the advantages of the KB pistons is the ability to operate on lower clearances. So, I was planning on providing the specs when I drop off the pistons and cylinders. I was sure that the 3.50 would be correct for the head gaskets. My concern was that the .020 over on a cylinder size might make a difference in head gasket. Just thought I would ask.

a lot more problems with the KB hypertechnic pistons than just clearance.we`ve seen them break for no reason many times.we refused to use them for years here
 
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Old Apr 5, 2020 | 09:29 AM
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What part of Florida are you in? Do you mind if i ask who your machinist is? Just curious if i know them, as i do know a few.
m
 
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Old Apr 5, 2020 | 10:53 AM
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I'm in Fort Myers. The oldest machine shop here is Hood's. They handle most of the automotive machine work around here. Quite a bit of performance work.
 
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Old Apr 6, 2020 | 12:33 PM
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is the KB problem limited to their hypereutetic line?

they also offer forged and a different line of cast
 
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Old Apr 6, 2020 | 09:14 PM
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i've only seen issues with the hyper line never seen any other levels actually installed.
m
 
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