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Oct 20, 2009, 08:57 AM
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#1
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clearances on wiseco pistons
does anyone have clearance sheets for wiseco pistons? i called wiseco and they said they didnt have a clearance sheet!!! Im planning on running 30+ psi on e85. The rep told me that the min should be .003, but reccomended .004 for around 30psi. Ill post piston # and kit #s when i get out of work. PLEASE HELPPPP!
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That twenty centuries of stony sleep
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And what rough beast, its hour come round at last,
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Oct 20, 2009, 08:57 AM
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#2
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Bump
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That twenty centuries of stony sleep
Were vexed to nightmare by a rocking cradle,
And what rough beast, its hour come round at last,
Slouches towards Bethlehem to be born?
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Oct 20, 2009, 08:58 AM
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#3
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DOUBLE BUMP! this is important!
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That twenty centuries of stony sleep
Were vexed to nightmare by a rocking cradle,
And what rough beast, its hour come round at last,
Slouches towards Bethlehem to be born?
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Oct 21, 2009, 07:31 AM
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#4
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bump
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That twenty centuries of stony sleep
Were vexed to nightmare by a rocking cradle,
And what rough beast, its hour come round at last,
Slouches towards Bethlehem to be born?
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Oct 21, 2009, 12:50 PM
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#5
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Are you looking for ring gap or piston to wall clearance?
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Oct 22, 2009, 03:16 PM
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#6
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piston to wall
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That twenty centuries of stony sleep
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And what rough beast, its hour come round at last,
Slouches towards Bethlehem to be born?
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Oct 22, 2009, 03:35 PM
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#7
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0.0040" is what recommend to me and what I used.
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He who said that there is no replacement for displacement didn't know pkZIP. :p
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Oct 23, 2009, 02:34 PM
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#8
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They told you what you should do....run .003" unless you're running more boost (30psi+) which requires about .004". That sound correct to me, but if you're not sure just call Wiseco. Ask for Brian Nutter.
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Oct 23, 2009, 08:09 PM
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#9
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Are you building the car yourself?
What i know is that if you want to run higher than 30psi you need to run more open than the reccomended in the box...
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Oct 25, 2009, 02:07 PM
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#10
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im running .003 on wiseco's, I stayed a bit on the tight side, hopefully its enough for 30psi+ on race fuel. I probably should have went with .0035 - .004 though. lol
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built 2L - GSCS2 - Hypertune intake - GT3582.....
490whp pump gas 27psi dynamics 1.0CF
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Oct 25, 2009, 02:26 PM
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#11
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Wiseco pistons need to be on the loose side of what they recommend. They use 4032 which expands a little different than 2618 (JE, CP, Ross, etc.) which is the normal usage. It should also be based on power not boost as the expansion has nothing to do with boost.
I would go no less than 4 thou on piston to wall. If its going to be a 500+ whp monster I'd think about 4.5 thou. For comparison on my motor (expecting 700-750whp) I went 5.5 thou.
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Oct 31, 2009, 07:33 PM
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#12
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Quote:
Originally Posted by JohnBradley
Wiseco pistons need to be on the loose side of what they recommend. They use 4032 which expands a little different than 2618 (JE, CP, Ross, etc.) which is the normal usage. It should also be based on power not boost as the expansion has nothing to do with boost.
I would go no less than 4 thou on piston to wall. If its going to be a 500+ whp monster I'd think about 4.5 thou. For comparison on my motor (expecting 700-750whp) I went 5.5 thou.
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should i be worried with my wiseco's at .003? Making the power in my sig, havent been tuned for race gas/high boost yet. Wiseco recommend .0025 as a starting point iirc.
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built 2L - GSCS2 - Hypertune intake - GT3582.....
490whp pump gas 27psi dynamics 1.0CF
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Nov 1, 2009, 07:35 AM
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#13
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I run Wisecos at about 0.0005" PTW clearance. I've tried 3 and 4 thou and usually get just a little side wall scuffing. 5 thou is perfect for the 300-500 HP engine not spraying nitrous. If nitrous, add another thou or two.
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Nov 2, 2009, 10:14 AM
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#14
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originally i had decided on .0035 but i will go with .004 as per wiseco's instructions. my goal is650 whp/600wtq on e-85. do you think this is reasonble?
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And what rough beast, its hour come round at last,
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