Thread: 72 402 Truck Motor Performance, Any Ideas?

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with the small cc and the 402 piston yes if has the 350hp pistons and o deck it will be that

Originally Posted by pat mccarthy

with the small cc and the 402 piston yes if has the 350hp pistons and o deck it will be that

Operating Range: 1600-5800 RPM
Duration Advertised: 270° Intake / 286° Exhaust
Duration @ .050'' Lift: 226° Intake / 236° Exhaust
Valve Lift w/1.7 Rockers: .544'' Intake / .547'' Exhaust
Lobe Separation Angle: 112°
That is what comp cams told me to run.


Operating Range 1500-6500 RPM
Duration Advertised 300° Intake/306° Exhaust
Duration @ .050'' 240° Intake/246° Exhaust
Lift @ Valve .560'' Intake/.573'' Exhaust
Lift @ Cam .330'' Intake/.337'' Exhaust
Lobe Separation Angle 112°
Intake Centerline 110°
Intake Timing @ .050" Open 10° BTDC
Close 50° ABDC
Exhaust Timing @ .050" Open 57° BBDC
Close 9° ATDC
That is what edelbrock told me. Which one will give me the roughest idel and performance? How does the gm cam compare with them? I appreciate the replys.