Mast Motorsports LS7 Crate Motor - Going Overbored

DYNO DATA
RPM	LB-FT	HP
2,000	344	130
2,200	345	144
2,400	388	177
2,600	420	211
2,900	447	246
3,100	474	282
3,400	493	317
3,600	507	349
3,800	509	370
4,100	500	387
4,300	525	433
4,600	562	487
4,800	576	524
5,000	581	557
5,300	582	592
5,600	583	622
5,900	576	644
6,100	563	656
6,400	547	663
6,600	530	669
6,900	509	667

Although the standard Mast LS7 SS is rated at 650 hp and 560 lb-ft, the optional FAST intake manifold on our test engine increased those numbers to 669 and 583, respectively. At just 2,500 rpm the motor is already producing over 400 lb-ft, yet the big LS7 keeps on pulling past 7,000 rpm. How's that for a flexible power curve? To keep the test data as accurate as possible, Mast prefers step testing its engines on the dyno instead of the more common sweep testing procedure.