Modified ramp profile for optimum power. Recommend all the good stuff. TA roller rockers and valve springs required. Rough idle. 11:1 or more CR.

Idle Quality:

Smooth Idle - just like stock
Good Idle - mild lump, but doesn’t impair driveability
Moderate Idle - nice performance sound
Fair Idle - heavy lump
Rough Idle - very lumpy race type idle
 

VALVE LIFT 

• STOCK 1.55 RATIO:
   IN: .539”
   EXH: .539”
• TA ROLLERS 1.60 RATIO:
   IN: .556”
   EXH: .556”

DURATION

• AT .050
   IN: 260
   EXH: 268
• ADVERTISED
   IN: 312
   EXH: 320

• LOBE CENTER: 108
• POWER RANGE: 4000-7000