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piston to cylinder wall clearance with forged pistons

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Old 11-14-2012, 10:36 AM
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Question piston to cylinder wall clearance with forged pistons
I ask alot of questions these days , this one is important befor I take the block to the machine shop and bore/hone the cylinder walls

wiseco pistons that I got recomend .0035" clearance

the block Im working with is a 2006 LQ4 iron block and going to 4.030 bore with it .

also what grit should be used to achive the final cross pattren ?
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Old 11-14-2012, 11:10 AM
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this is all NA setup
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Old 11-14-2012, 11:16 AM
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What grit to achieve cross pattern? Huh?
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Old 11-14-2012, 11:30 AM
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I have a gauge for that
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If weisco recommends 0.0035 I would use 0.0035.
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Old 11-14-2012, 11:33 AM
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Originally Posted by Atomic
If weisco recommends 0.0035 I would use 0.0035.
Yes, do what they say. The day I had a '30 years of experience' engine machinist recommend more than that with Wiseco pistons, it trashed the pistons. Among other things...
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Old 11-14-2012, 11:33 AM
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Originally Posted by TXSZ66AVLANCHE
What grit to achieve cross pattern? Huh?
240 ,320 , 400 , whats the best ? thats what I ment
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Old 11-14-2012, 11:36 AM
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found it 400grit on my Joseph Potak book
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Old 11-14-2012, 11:43 AM
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Originally Posted by smokeshow
Yes, do what they say. The day I had a '30 years of experience' engine machinist recommend more than that with Wiseco pistons, it trashed the pistons. Among other things...
You were the first person I thought of when I saw this thread.
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Old 11-14-2012, 11:51 AM
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Dngle ball FTW!!!^^^^
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Old 11-14-2012, 11:55 AM
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Originally Posted by sand man
240 ,320 , 400 , whats the best ? thats what I ment
Lol what I meant was if your taking it to a machine shop let them worry about the cross pattern.
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