Question about 1989 Ford F 150

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Have 302 w/ mustang header and seem to have lost power

I bought 89 150 Custom, modified by NASCAR guys, upon which they put on Mustang header, and false side dual exhaust. One pipe of exhaust finally broke free due to intense stress on hangers; thankfully not killing anyone behind me from the cart-wheel expulsion. I had true dual exhaust system installed - A-1 quality job, can do pull ups on piping - but seem to have lost significant power on 302. Believe the total release of any backpressure may have contributed to loss of power, perhaps because the valves may be floating due to uninhibited exhaust discharge. Do you have any suggestions?

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If you have strong valve springs they shouldnt be floating... What kind of mufflers? They could be adding backpressure, Id go with a straight through mufler.

Posted on Jan 25, 2009

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