True Dyno Numbers

The Dan

New Member
Jul 16, 2003
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Orange County, CA
A little OT, but thought I'd report to you 289 owners who have ever wondered what kind of numbers their engine is putting out.

I just got back from getting my 65 FB dynoed. With a Holly 570 Street Avenger, Weiand stealth intake, Flowtech long tubes into 2 1/2" pipe into flowmaster 50's with 2 1/4" tail pipes, and all stock internals it was 182 RWHP @ 4800rpm. I was a little disappointed, but at least I know where she stands. No where to go but up. In money and HP!
 

The little 289 in our 65 coupe runs 180 on the dyno at 4800 too
 
The stealth is about equivalent to the RPM, but by most accounts I'v heard... a little better in about every way. Revs higher (Advertised), i've seen a few dynos where hp is consistently 2 or 3 higher at all rpms, and everything else is about the same.