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FE Power Forums => FE Technical Forum => Topic started by: chris401 on June 08, 2017, 08:25:38 PM

Title: Inconseistant OEM Crank Stroke
Post by: chris401 on June 08, 2017, 08:25:38 PM
Is there any machining pattern or foundry that can be associated with noticeable OEM Ford stroke differences?

Not trying to identify anything, just curious.

Example: 3.78 +/-.006 or 3.98 +/-.003
Title: Re: Inconseistant OEM Crank Stroke
Post by: cjshaker on June 08, 2017, 09:11:11 PM
The differences would have came from worn tooling, not specific to where they were cast or machined. On a mass run like factories make, tooling wears down and has to be replaced. Each machining center will go through a range of tolerances as it wears.
Title: Re: Inconseistant OEM Crank Stroke
Post by: chris401 on June 09, 2017, 12:23:54 PM
That is a given. I thought any of the former Ford foundry employees would remember if certain plant managers were bad about pushing tooling too far to meet production numbers over quality.