Marine and heavy duty engines spend their lives at sustained load rather than short bursts, so the cam profile has to build usable torque low in the range instead of chasing peak horsepower. This Class 1 hydraulic flat tappet grind targets that duty cycle on Ford 289, 302 and 351 engines.

Melling 24107 Timing and Lift

• 0.416 in. intake valve lift and 0.444 in. exhaust valve lift.
• 280 degrees advertised intake duration and 293 degrees advertised exhaust duration.
• 197 degrees intake and 209 degrees exhaust duration at 0.050 in. lift.
• 114 degree lobe separation, 1.6 rocker arm ratio.
• Hydraulic flat tappet; not computer controlled compatible.