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Registered Member
Join Date: Mar 2000
Location: Springfield, Ma, usa
Posts: 706
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![]() I have a MAC TB and it only whistles when I moderately accelerate at about 1500 to 2500 rpms. Never had a problem at idle. I have heard that some aftermarket TB's do whistle. I'm not too sure about that whole drilling a hole in the butterfly of the TB. I t just seems like it would cause more idle problems. Plus if an aftermarket TB were meant to have a hole drilled in it, it would have been done so by the manufacture.
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NewEngland Auto www.baystategearheads.com -91 Mustang Coupe, ex 4cyl (sold) -99 F150, 3" lift, 35" Procomps, Magnaflow exhaust |
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