Message: Hey Larry, is a ported/polished 50mm TB too big for a mildly modified V6? The gas milage is better by 25 miles per tankful! I still can't climb hills that great, but when I have the pedal floored, the engine races up to 5300 rpm. It kinda scares me to see the engine jump that quickly. I will port/polish the old 42mm next and compare the performance between the two.
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Subject: 50mm TB on a 3.9 V6