A while back I had a buddy flattened a cam lobe on his 355. We tore down the motor, cleaned, replaced the cam and all has been well since, but he's worried about it happening again. 355 with aluminum heads, 1.6 rockers about 10.3:1 compression, 5 speed, 3.73 gears, 28" tire, 1 5/8 long tube out a dual exhaust.. all in a Silverado. Very similar build to mine. Currently has a Lunati bare bones flat tappet 224/234 Duration at .050". 112 Degree Lobe Separation Angle. 0.465"/0.488
He wants to change it to a retro fit roller and has found a custom cam grinder who has shot a couple options over to him. Curious on y'alls opinion.
Cam# SBC, HR71360-72360-110
276/280 @.006"
228/232 @.050"
.360"/.360" Lobe Lift
.576"/.576" Valve Lift w/1.6 rockers
110 LSA
272/276 @.006"
224/228 @.050"
.340"/.340" Lobe Lift
.544"/.544" Valve Lift w/1.6 rockers
110 LSA
With both cams he is recommending these lifters:
Lifter# XLR-8H01
.842" SB Chevy Hyd.Roller Lifter, 16set
Tie-bar, Retro-fit, Slow Bleed Rate
He claims both cams are good for a gain of 40-50 hp and 30 lb/ft of torque over the current cam. Sounds optimistic but wanted y'alls opinion?
He wants to change it to a retro fit roller and has found a custom cam grinder who has shot a couple options over to him. Curious on y'alls opinion.
Cam# SBC, HR71360-72360-110
276/280 @.006"
228/232 @.050"
.360"/.360" Lobe Lift
.576"/.576" Valve Lift w/1.6 rockers
110 LSA
272/276 @.006"
224/228 @.050"
.340"/.340" Lobe Lift
.544"/.544" Valve Lift w/1.6 rockers
110 LSA
With both cams he is recommending these lifters:
Lifter# XLR-8H01
.842" SB Chevy Hyd.Roller Lifter, 16set
Tie-bar, Retro-fit, Slow Bleed Rate
He claims both cams are good for a gain of 40-50 hp and 30 lb/ft of torque over the current cam. Sounds optimistic but wanted y'alls opinion?