Cam Chart
 XE275HLMM6581/6583
Rated Duration275/287 DEG265/273 DEG
Duration at .050"231/237 DEG239/247 DEG
Lobe Lift .350/.350" .358/.373"
Gross Lift 1.6:1 Ratio .560/.560" .573/.597"
Lift at Valve After Lash .560/.560" .555/.577"
Lobe Separation Angle110 degree110 degree
Installed Centerline106 degree106 degree
Cranking psi Observed180 psi178 psi
Idle Vacuum at 900 rpm12.712.6

Dyno Results
Tested At Westechsuperflow 901 Dyno

440 Wedge
Engine Torque
RPMHYDSLD
3000516515
3500540545
3800557555
3900557559
4000555557
4500549540
5000526521
5500493513
5900414488
6000 479
6300 437
Engine Horsepower
RPMHYDSLD
3000295294
3500360363
4000423424
4500471462
5000501496
5400520528
5500517537
5800495550
5900465549
6000 547
6300 525
Peak values are bold.

SOURCE
Competition Cams
Memphis
TN
8-00/-999-0853
compcams.com
Hooker Headers (A Division of Holley)
N/A
8-00/-Hol-ley1
holley.com
Westech Performance Group
11098 Venture Dr., Unit C
Mira Loma
CA  91752
9-09/-685-4767
www.westechperformance.com
Edelbrock Corp.
2700 California St.
Torrance
CA  90503
310-781-2222
www.edelbrock.com