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BMBBR5 Roller Cam 283 on a 115


Can you give us a little more info on that cam?
LSA 115 (wider than I expected)
Intake/Exhaust at 0.050" 283?
Lift with the 1.6 ratio?

I bought your BMBB 3R from another racer for my 540 CID, 345CNC.
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The big tubes lost quite a bit of torque for a few horsepower gain. I would say the smaller tubes are a better choice
Keith

I liked the straight 2.125" headers. They made more torque and the horsepower pulled to the top of the pull (7400rpm). That surprised me with 572 CID. Perhaps the cam and 3X intake?



I am willing to bet the exhaust duration at .050 is over 300 degrees with that wide of a lsa. That would provide enough overlap in the "fifth cycle". It would also keep the other three opening and closing points close to what other cams have with less exhaust duration and narrower lsa. The exhaust opening point is the one that would move around( open earlier) if I am right.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky