Quote:
Originally Posted by 4tun8
Why do you have a blow off valve?
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Because the M90 on T-Bird SCs has a vacuum activated bypass valve in the stock inlet and return plenums that elminates the need for one. He needs to relieve that pressure somehow.
My Thunderbird SC makes 17psi with a Generation 3 M90 (square inlet port). I hand ported it, put in GTP coated rotors and have a 10% overdrive pulley.