TwinTurbo.NET: Nissan 300ZX forum - If they machine it properly
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Subject If they machine it properly
     
Posted by -Grimm- on September 12, 2014 at 11:12 AM
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In Reply To Built motor question. Worth a shot posted by BigTDogg (MA) on September 12, 2014 at 10:35 AM
     
Message I.e. Measure a piston, bore/hone to that specific piston, ten you shouldn't have any issues.

If they bore to a spec, like ordering 0.5mm oversized and bore to 0.5mm over stock, then issues are more likely (although you would probably still be ok)

If the ring lands commonly break (which it sounds like they do) then forged is the only way to go.

Anyone know if stock they are running cast or hyper?

PS most likely the pistons are overheating causing the cracking.

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1992 300ZX NA 5 Sp (Dead)
1990 300ZX NA Auto 2+2 (Dead)
1990 300ZX TT 5 Sp (Est. 400 HP)
1990 300ZX TT 5 Sp (Est. 600 HP)
2004 G35 Sport 6MT (DD)

     
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