special custom cams have been dynoed and the proven horsepower/torque numbers
are listed. All require an adjustable valve train.
[email protected] [email protected] Gross/Lift Lobe/Sep
260/266 310/321 .597/.608 108/104
This hydraulic roller cam in a 496 cu in 455 Olds
engine with DMR ported aluminum heads made 588.8 horsepower @ 5500 RPM and
625.7 torque @ 4600 RPM using 12.5:1 compression on 110 octane pump gas. Needs
ported heads that flow in the 300 CFM range. Excellent for strip use. Needs a
4000+ converter, intake, headers and 4.10+ rear gears. Rough idle.