Quote:

Quote:

I lost a solid .1 from switching from a billet steel A & A drum to a billet aluminum drum
Can this really happen?
No other changes were made and the 727 torqueflite is fresh

unless you did the swap on the same day same conditions it would be hard to compare.




This is over the course of the whole racing season. Just never 60 footed where it was and to the 1/8th off by .05 and 2 mph and a full tenth at the big end.
Was hoping for a new best with the good air only to come up short.