I would think it would be better to trigger meth based on MAP pressure than RPM, unless that's just a window switch and it's still based on MAP in addition.
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Car Sold! Pleasure being a part of the Z community. 
New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91)
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