Description
This Howards Cams 121861-12 BBC Hydraulic Flat Tappet Camshaft fits 396-502 cubic inch Mark IV Big Block Chevy engines from 1965-1996. Howards designed this cam for performance/bracket for 500+ CID use, and it features great low-end torque and a nice idle. A 10.5-12.0:1+ compression ratio, lower rear end gears and a 3600+ stall speed torque converter are highly recommended. Also good with large roots blower.
Howards Cams 121861-12 BBC Hydraulic Flat Tappet Camshaft Specs:
- For Big Block Chevy 396-502 engines from 1965-1996
- Basic RPM Range: 3200 to 7400
- Valve Lift Intake: .612
- Valve Lift Exhaust: .595
- Intake Duration: 305
- Exhaust Duration: 313
- Intake Duration at .050”: 251
- Exhaust Duration at .050”: 259
- Lobe Separation: 112
- Intake Centerline: 108
- Firing Order: 1-8-4-3-6-5-7-2
- Recommended Lifter Set: 91111 Performance
- Recommended Premium Lifter Set: 91112 Max Effort
- Recommended Valve Springs: 98636
- Recommended Valve Spring, Retainer and Lock Kit: 98636-K31
- Made in the USA
Notes: Stock (O.E.) valve springs can NOT be used.
Howards Cams designed this Flat Tappet Hydraulic camshaft for high performance on the street and on the drag strip.
Howards Hydraulic Cams – From mild to wild, they are the ultimate in performance!
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