4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

piston to wall clearance with 03 cobra pistons.

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Old 05-03-2007, 02:32 PM
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Mark99GT
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Default RE: piston to wall clearance with 03 cobra pistons.

ORIGINAL: 01GT4.6

I called THR and talked to Bob, he gave me some info but told me to call back in an hour. I called Ford SVT and talked to them they said that the piston to bore clearance shoule be .010mm-.026mm. I coverted it to inches and came up with .00039" - .0010" (39/100000" - 1/1000"). I called back to double check and they said that is correct!
Wow, that is tight. Ive read about the stock hypers being .001

What are you going to tell the guy at the machine shop?
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