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Originally Posted by Z63R
^ ^ ^ In addition to that performance rebuild, you'll probably need a performance-calibrated valvebody (FRPP has sold them; LenTech modified them for Ford) -AND- a digital tune to take care of what the VB doesn't... the 1-2 shift which is controlled by a pulse-width-modulated servo.
RallyRacer should have more info on the above; iirc he's posted a good-but-short post on a do-it-yourself calibration for the 4F27-E using, I think, an SCT XCal.
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Definately... I plan on the Lentech valve body and already have an xcal2 with FS tunes.
I guess a PM to RallyRacer might be my best bet. Thanks.