Vortecpro 496 - 675 LbFt 670 Hp, 049 heads, pump gas, Big Block Chevy Mark IV BBC 496 Dyno test run

Follow my build thread:

Mark IV 4-Bolt BBC 496 4.310X4.250, 9.7:1 Compression, Mahle pistons , Scats rods 6.385
Scat 4340 crank - with center counterweigths - internally balanced
Ported 049 GM heads - Int: 2.190 - Exh: 1.880
Isky Hyd. Roller - Dur.: 238/248 @.050 - Lift: .578/.608 - LSA/ICL: 110/106
Morel lifters, Scorpion 1.7 rockers, Rollmaster timing chain
Edelbrock Performer RPM Air Gap Intake, Holley 850 CFM, 1" Spacer
Moroso pan modified - 6.5 quarts - M77 oil pump

Dyno-Pull with 91 octane, 35° timing - NGK spark plugs 4323:
Rpm---LbFt---HP
4200: 675 - 540 (Peak torque = 920 Nm)
4300: 671 - 549
4400: 667 - 559
4500: 663 - 568
4600: 656 - 575
4700: 654 - 586
4800: 649 - 593
4900: 647 - 604
5000: 645 - 614
5100: 643 - 624
5200: 639 - 632
5300: 635 - 641
5400: 632 - 650
5500: 625 - 654
5600: 620 - 661
5700: 610 - 662
5800: 601 - 663
5900: 593 - 666
6000: 586 - 669
6100: 577 - 670 (Peak HP = 780 Nm)
Redline at 6500

Average Torque (4200-6100): 635 LbFt (860 Nm)
Average Power (4200-6100): 624 Hp