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OE Nailhead Cam Specs and Street Cam Selection Guide


 
 
OE specifications for 401 and 425 camshafts. Remember, these are measured at .002", NOT .005" or .050"!
 
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'
0°30' 0°30' 0°30'
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°
Click Here for a print version!

Buick Nailhead Street Cam Selection Guide

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



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