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are the 929 and 954 cylinder cases the same except for the 954's bored 1mm further?

im thinking of building a turbo motor and if the 929 cylinders are thicker it will be the better choice
 

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are the 929 and 954 cylinder cases the same except for the 954's bored 1mm further?

im thinking of building a turbo motor and if the 929 cylinders are thicker it will be the better choice
I think they are the same OD but have never been able to confirm it for sure. I have a 954 opened up if you have an open 929 we can compare.
If you're turboing it though, I wouldn't waste your money boring and replating as the extra 50cc is going to have a minimal effect when you add the turbo.
 

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Discussion Starter #3
I think they are the same OD but have never been able to confirm it for sure. I have a 954 opened up if you have an open 929 we can compare.
If you're turboing it though, I wouldn't waste your money boring and replating as the extra 50cc is going to have a minimal effect when you add the turbo.

they wont be bored any, id just like to have the added insurance of a thicker cyl wall if im going to be increasing cylinder pressure quite a bit ( almost 1 bar)
 

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they wont be bored any, id just like to have the added insurance of a thicker cyl wall if im going to be increasing cylinder pressure quite a bit ( almost 1 bar)
I don't think there's much difference in strength as I've seen heaps more turboed 954's than 929's. Actually, I can only recall ever seeing one 929 turbo.
 
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I think they are the same OD but have never been able to confirm it for sure. I have a 954 opened up if you have an open 929 we can compare.
If you're turboing it though, I wouldn't waste your money boring and replating as the extra 50cc is going to have a minimal effect when you add the turbo.
i have a 929 apart let me know how to check it so we can compare and keep it noted for future.
 
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