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piston clearance

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Old Jun 13, 2017 | 07:29 PM
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From: perpetual tax state
Default piston clearance
Ive tried to get info out of wiseco but so far zero response from them
Does anyone know what might be typical piston to cylinder clearance for their evo forged pistons
I'm looking at their K1675 piston kit 3.503 10:1 .005 oversized
 
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Old Jun 13, 2017 | 07:38 PM
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I was recently told it should be about 6 thousandths but I'm not sure.
 
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Old Jun 14, 2017 | 11:05 AM
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Not sure ,but you might want to look here for your Evo parts. Great parts at a great price. I did this and had no problems what so ever.
http://www.hastingsmotorcycleparts.c...-Kit-TE400.htm
 
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Old Jun 14, 2017 | 12:04 PM
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.003"-.0035" Forged...... For an Evo Motor. As bore increases so does the clearance... Cast is less..
 
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Old Jun 14, 2017 | 06:51 PM
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we do cast at .003 and a 10.1 to 1 we would do a .004 to even .005 depends how you intend to drive it
 
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Old Jun 16, 2017 | 02:44 PM
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Originally Posted by johnjzjz
we do cast at .003 and a 10.1 to 1 we would do a .004 to even .005 depends how you intend to drive it
I can see compression and heat making a difference but still will not go over. 004" these aren't shovels.....
 
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Old Jun 17, 2017 | 05:07 PM
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Originally Posted by 98hotrodfatboy
I can see compression and heat making a difference but still will not go over. 004" these aren't shovels.....
our championship road racing buell we ran it at .006 piston to wall at the finals at mid ohio to win the 1998 USA title

my sons nhra super gas nova we have run the one of the engines at .008 an entire season .0065 is the norm - piston flop over is only an issue when you have a short rod stroke ratio
 
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Old Jun 17, 2017 | 05:27 PM
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John, I fully understand the need for more clearance on a 14:1 260 ccp motor. But we're not doing that on the street.... And you would like to get a full day of running on the strip without pulling the pistons.....
 
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Old Jun 18, 2017 | 02:02 PM
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.001" per 1 inch diameter.
 
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Old Jul 3, 2017 | 04:59 PM
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Someone from Wiseco got back to me via email and gave m .0025 inch for minimum clearance
 
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