UPDATE: Ran back to back runs SB vs BB.
SB:
[email protected] 80 mph 1.41 60ft.
BB: 3.89 @ 80 mph 1.41 60ft.
Clear as mud. lol. Sorry, don't have those time slips; but I do have these:
Best pass with BB. (Don't mind the reaction time - Damn staggered heads up tree gets me every time, lol)
Best pass with SB. Same track, different day, different tires and different track conditions. Not really apples to apples.
On another note, this motor/chassis combo runs about the same times at 3 very different tracks with only tire pressure adjustments. It even ran identical times (and mph) going from 72 r/o 14 staggereds to 76 r/o 14 staggereds with NO gearing change. Good 60 ft times are easier to obtain with the bigger tire, but not better (I had more 60 ft passes in 1.3s with the big tires, but still had some 1.3s with smaller tires).
To sum this thread up. I would say that the BBs are easier to get down the track being more forgiving. I can shift into 3rd gear quicker with the BBS without fear of falling out of the power. I believe with both pipes that I could have geared a tooth smaller in the back and ran even better if the 60 ft times would stay good. I am certain that the BBs would pull higher gear.