COMP CAMS
COM-12-688-47

COMP CAMS CHEVY V8 (262-400) - SWAP FIRING ORDER CAMS

Oval track 4 & 7 Swap Firing Order Mechanical Flat Tappet Camshafts with 18736542 Firing Order.

 

 

The COM-12-688-47 & COM-12-689-47 are best on 1/4 to 3/8 mile tracks. The COM-12-688-47 is best in 327-358 ci 11:1 compression with a good 2 bbl intake & exhaust. The COM-12-689-47 is best in 327-358 ci 12:1 compression with a good 4 bbl intake & exhaust. The COM-12-690-47 is best on 3/8 to 1/2 mile tracks with 360+ ci 12:1 compression & a good intake & exhaust. Uses COM-950-16 valve springs.
 PART NUMBER  DESCRIPTION

COM-12-688-47

 47S 278XOS Grind, 3000-6800RPM, 248 Dur. @ .050, 278 Ad. Dur., 106 Lobe Sep., .531 Valve Lift, .016 Valve Lash

COM-12-689-47

 47S 282XOS Grind, 3000-6700RPM, 252 Dur. @ .050, 282 Ad. Dur., 106 Lobe Sep., .540 Valve Lift, .016 Valve Lash

COM-12-690-47

 47S 290XOS Grind, 3400-7200RPM, 260 Dur. @ .050, 290 Ad. Dur., 106 Lobe Sep., .558 Valve Lift, .016 Valve Lash