Camshaft Performance Comparison
Comp-Cams 'Xtreme Energy ' XE-268H
vs.
Crower 'Ultra Beast' 269H
-------------------------------------------------------------------------------------
Customers Car
1970 Duster 340
Curb Weight........ #3280 lbs.
* Refeshed 340 Engine
> Stock Factory Pistons {Piston-to-Cylinder Wall Clearance > .005"}
> Speed-Pro Oil-Rings {+.005"}
> Decked {Piston Dome +.018" above-deck}
> Compression Ratio = 10.0
> Balanced {Crankshaft, Connecting-Rods, Pistons}
> Melling Hi-Volume Oil Pump
> Cloyes Single 'Non-Roller' Timing Chain
> PowerForce #80012 Harmonic-Balancer
* Stock Cylinder Heads > #2531894 'X' Head Casting
> 4/Angle Valve Job {w/75* Deep-Throat Cut}
> Combustion Chamber CC'd to {68.0}
> 2.02" Intake Valves {30* Back-Cut}
> 1.60 " Exhaust Valves
> Gasket/Port Matched
* 'Stock' Cast Iron Intake Manifold #3462848
> Gasket/Port Matched
* 'Stock' Carter AVS #4933 {630 CFM} Carburetor
> Primary Jets {.101"} ~ Secondary Jets {.098"}
> Metering Rods .068" x .047"
* Exhaust System
> Stock Exhaust Manifolds {Outlet honed out to 2.50"}
> 2.50" Primary Pipes
> Cherry Bomb #87096 Mufflers {2.50" Inlet ~ 22" Length ~ 2.25" Outlet}
> 2.25" Tail Pipes
* MSD #8388 ~ 'Ready-to-Run' Electronic Distributor
> MSD PH6200 6A ~ Capacitive Discharge 'Ignition Box'
> MSD 'Street-Fire' Ignition Wires
* 4-Speed {A-833} Ratio's > 2.47 ~ 1.77 ~ 1.34 ~ 1.00
> Zoom Street/Strip Clutch Set-up {#2500 lb. Spring Load-Rate}
> Stock Flywheel {10.5"} 30 lbs.
> 3.91 Gears
> 225/70 x 15" Rear Tires {27.4" Diameter}
-----------------------------------------------------------------------
"Comp-Cams XE-268H"
Part #20-223-3
Profile Name > 'Xtreme Energy'
Type > Hydraulic
Lift........................... .477"/.480"
Duration.................... 268*/280*
Duration @.050" ........ 224*/230*
Overlap..................... 54*
LSA........................... 110*
Centerline.................. 106*
Power Range.............. 1800 to 5800 RPM's
Best Torque Band........ 2400 to 4000 RPM's
Red Line..................... 6000 RPM's
* Mildly-Rough Idle
* Great for Street Performance
* Strong Low-to-Mid Range Torque
* Balanced Power-Range
Valve Springs #901 {Single-Coil w/Damper]
* #101 lbs. @ 1.650" {Installed Height}
* #242 lbs. @ 1.250"
* #270 lbs. @ 1.170" {Valve Open}
~ Versus ~
"Crower 269H"
Part #31916
Profile Name > "Ultra-Beast"
Type > Hydraulic
Lift.......................... .480"/.494"
Duration................... 269*/282*
Duration @ .050" ...... 223*/234*
Overlap..................... 62*
LSA.......................... 112*
Centerline................. 108*
RPM Power-Range...... 2000 to 4800 RPM's
Best Torque Band....... 2800 to 4500 RPM's
Red Line.................... 6200 RPM's
* Moderate Lope at Idle {Semi-Rough}
* High-End Street Camshaft
* Range > Upper Bottom-End to Top-End
* Strong Mid-Range Power
* Emphasis on Top-End
Valve Springs > #68405 {Dual-Coil Valve Spring}
* #110 lbs. @ 1.700" {Installed Height}
* #297 lbs. @ 1.200" {Valve-Open}
Comp-Cams 'Xtreme Energy ' XE-268H
vs.
Crower 'Ultra Beast' 269H
-------------------------------------------------------------------------------------
Customers Car
1970 Duster 340
Curb Weight........ #3280 lbs.
* Refeshed 340 Engine
> Stock Factory Pistons {Piston-to-Cylinder Wall Clearance > .005"}
> Speed-Pro Oil-Rings {+.005"}
> Decked {Piston Dome +.018" above-deck}
> Compression Ratio = 10.0
> Balanced {Crankshaft, Connecting-Rods, Pistons}
> Melling Hi-Volume Oil Pump
> Cloyes Single 'Non-Roller' Timing Chain
> PowerForce #80012 Harmonic-Balancer
* Stock Cylinder Heads > #2531894 'X' Head Casting
> 4/Angle Valve Job {w/75* Deep-Throat Cut}
> Combustion Chamber CC'd to {68.0}
> 2.02" Intake Valves {30* Back-Cut}
> 1.60 " Exhaust Valves
> Gasket/Port Matched
* 'Stock' Cast Iron Intake Manifold #3462848
> Gasket/Port Matched
* 'Stock' Carter AVS #4933 {630 CFM} Carburetor
> Primary Jets {.101"} ~ Secondary Jets {.098"}
> Metering Rods .068" x .047"
* Exhaust System
> Stock Exhaust Manifolds {Outlet honed out to 2.50"}
> 2.50" Primary Pipes
> Cherry Bomb #87096 Mufflers {2.50" Inlet ~ 22" Length ~ 2.25" Outlet}
> 2.25" Tail Pipes
* MSD #8388 ~ 'Ready-to-Run' Electronic Distributor
> MSD PH6200 6A ~ Capacitive Discharge 'Ignition Box'
> MSD 'Street-Fire' Ignition Wires
* 4-Speed {A-833} Ratio's > 2.47 ~ 1.77 ~ 1.34 ~ 1.00
> Zoom Street/Strip Clutch Set-up {#2500 lb. Spring Load-Rate}
> Stock Flywheel {10.5"} 30 lbs.
> 3.91 Gears
> 225/70 x 15" Rear Tires {27.4" Diameter}
-----------------------------------------------------------------------
"Comp-Cams XE-268H"
Part #20-223-3
Profile Name > 'Xtreme Energy'
Type > Hydraulic
Lift........................... .477"/.480"
Duration.................... 268*/280*
Duration @.050" ........ 224*/230*
Overlap..................... 54*
LSA........................... 110*
Centerline.................. 106*
Power Range.............. 1800 to 5800 RPM's
Best Torque Band........ 2400 to 4000 RPM's
Red Line..................... 6000 RPM's
* Mildly-Rough Idle
* Great for Street Performance
* Strong Low-to-Mid Range Torque
* Balanced Power-Range
Valve Springs #901 {Single-Coil w/Damper]
* #101 lbs. @ 1.650" {Installed Height}
* #242 lbs. @ 1.250"
* #270 lbs. @ 1.170" {Valve Open}
~ Versus ~
"Crower 269H"
Part #31916
Profile Name > "Ultra-Beast"
Type > Hydraulic
Lift.......................... .480"/.494"
Duration................... 269*/282*
Duration @ .050" ...... 223*/234*
Overlap..................... 62*
LSA.......................... 112*
Centerline................. 108*
RPM Power-Range...... 2000 to 4800 RPM's
Best Torque Band....... 2800 to 4500 RPM's
Red Line.................... 6200 RPM's
* Moderate Lope at Idle {Semi-Rough}
* High-End Street Camshaft
* Range > Upper Bottom-End to Top-End
* Strong Mid-Range Power
* Emphasis on Top-End
Valve Springs > #68405 {Dual-Coil Valve Spring}
* #110 lbs. @ 1.700" {Installed Height}
* #297 lbs. @ 1.200" {Valve-Open}