Straight pattern version of the 308S, specifically designed for Stage 2 & Stage 3 combinations. TA roller rockers and valve springs required. 4000 + stall converter recommended. 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: .580”
EXH: .580” - TA ROLLERS 1.60 RATIO:
IN: .598”
EXH: .598”
DURATION
- AT .050
IN: 268
EXH: 268 - ADVERTISED
IN: 304
EXH: 304
- LOBE CENTER: 108
- POWER RANGE: 3500-6500
