TwinTurbo.NET: Nissan 300ZX forum - Re: 89mm
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Subject Re: 89mm
     
Posted by MikeC(NZ) on August 21, 2012 at 5:49 AM
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In Reply To 89mm posted by BLACK Z on August 21, 2012 at 01:30 AM
     
Message I also had a few blocks sonic tested a few blocks and they have very little meat on them.

We bored a block just 1mm over and it caused me grief. Then we sonic checked a further 5 blocks and only two would take even a light over-boring. Sure you can get lucky on a street engine but the risks are not worth it IMHO.

The JUN kit using the 91mm pistons require sleeves. I corresponded with JUN and they advised that I would have to sleeve the block to get the 3.2L

There is also no real point, the extra power from 3litre to 3.2litre is like 1psi of boost. Thought the JUN crankshaft is nice.

     
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