422 dyno fail

PRH said
I thought after you had your motor off the dyno you discovered something that was the likely cause of the lower than expected power?

The top end of the run on the last sheet from the OP had the bsfc numbers in the .7 range.
In 32 years, I don’t think I’ve ever seen them that bad....... not without a plug wire off or something like that.

Poor bsfc numbers are simply the result of using a lot of fuel....... and not efficiently converting it to hp.

Edit- just read thru mbairds old dyno thread.
His engine was overfilled with oil by 2.75qts....... which I have personally seen cause big power losses.

Yes it was overfilled and I cleaned up the Victor intake but without dynoing it again I hate to speculate what it may be putting out now.
Still surprised at the high BSFC numbers . My heads are the closed chamber race heads and CC/polished with .040 quench. I would have guessed it would be more efficient .