CAM PART NO. | 1185918 | 1351515 | 1359442 | 1358100 | 1362242 | 1368091 | 1368090 |
NO. ON SHANK | 1174480 | 1174480 | 1374480 | 1674480 | 1362241 | 1362241 | 1362241 |
401 | 1959-61 | 1962-63 | Late 1963-64 | ||||
425 | 1963 | Late 1963-64 | 1965 | 1966 | |||
425 2X4 | 1964 | 1965-66 | |||||
MACHINED GROOVE IN SHANK | .060" | NONE | NONE | .060" | .060" | .120" | NONE |
TIMING ADVANCE OF #1 EXHAUST LOBE AHEAD OF SPROCKET KEYWAY | 2°30' |
5° | 5° | 0°30' | 0°30' | 0°30' | 5° |
EXHAUST DURATION .002" | 299° | 302° | 295° | 299° | 299° | 299° | 295° |
EXHAUST LIFT | .441 | .439 | .431 | .441 | .441 | .441 | .431 |
INTAKE DURATION .002" | 290° | 295° | 295° | 290° | 290° | 290° | 295° |
INTAKE LIFT | .439 | .439 | .431 | .439 | .439 | .439 | .431 |
SPACING | 109° | 114° | 114° | 109° | 109° | 109° | 114° |
EXHAUST OPEN BBC | 75° | 76° | 76° | 71° | 71° | 71° | 76° |
EXHAUST CLOSE ATC | 44° | 46° | 39° | 48° | 48° | 48° | 39° |
INTAKE OPEN BTC | 33° | 28° | 28° | 29° | 29° | 29° | 28° |
INTAKE CLOSE ABC | 77° | 87° | 87° | 81° | 81° | 81° | 87° |
OVERLAP | 77° | 74° | 67° | 77° | 77° | 77° | 67° |
These are a set of good performance cams for Buick Nailhead. I am choosing one for my '66 Riviera GS which is about to receive a fresh 425. It has A/C, and when I stop at a light and the A/C cuts in, I don't want it to stall!
I am not concerned about getting a lumpy sounding car, which seems the first concern of many camming up their motors. I want a car that runs nice with whatever top end I can get. I definitely don't even want to go over about 5000.
Nailheads are popular builds, so I thought there might be some interest in this information by those builders.
Please comment on your experiences
MAKE | GRIND | RPM RANGE | DURATION .050" | LOBE SEPERATION |
GROSS LIFT |
Comp Cams | Hydraulic Thumper 91-600-5, Ebay | 2000-5800 | 227/241 | 107 | .478/.465 |
Comp Cams | Comp Cams XE274H, Ebay | 2000-6000 | 230/236 | 110 | .506/.506 |
Comp Cams | Comp Cams BS 268H-10, Ebay | 1000-5000 | 212/212 | 110 | .454/.454 |
T/A Performance | TA_112-401 | 1500-5000 | 210/215 | 112 | .450/.466 |
T/A Performance | TA_20 | 1500-5000 | 218/218 | 112 | .455/.455 |
T/A Performance | TA_25 | 1500-5000 | 218/228 | 112 | .459/.479 |
T/A Performance | TA_30 | 2000-5500 | 228/228 | 112 | .472/.472 |
Schneider | 262-70H | 1800-5500 | 208/214 | 112 | .448/.456 |
Schneider | 270-80H | 2000-6000 | 214/220 | 112 | .472/.480 |
Elgin | Elgin E564S, Ebay | N/A | 207/207 | 112/116 | .430/.430 |
Isky | 115126, Ebay | 2000-5500 | 208/208 | 108 | .445/.445 |
Isky | 115126, Ebay | 2000-6000 | 216/216 | 109 | .470/.470 |