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Does a tune with A4 line pressure @100% make a difference at WOT?

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Does a tune with A4 line pressure @100% make a difference at WOT?

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Aug 13, 2005 | 10:23 AM

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Does a tune with A4 line pressure @100% make a difference at WOT?

I have heard two things:

1) HPP3 (and the like) shift firmness line pressure % adjustment does nothing at WOT, because the PCM calls for 100% at WOT anyway

2) HPP3 (and the like) does firm up shifts tighter than stock even at WOT.

Any tuners know this for sure which is true?

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100, firm, line, pressure, shift, wot

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