Camshaft Specifications for Type 4 Engine - click here to order camshafts

Data is based on actual averaged sampling of production cams - camshaft lift and duration may not be the same. The choice of measurement technique varies. Use the data in this chart as the best estimate of the product you will receive when ordering.

Note: Most camshafts can be ground on a 1" base circle for clearence on a large stroker application.

Camshaft Grind

Intake @ .020"

Exhaust @ .020"

Lift at Cam

Duration

Lobe Center

open

close

open

close

@ .020"

@ .050"

054.106 C

32° BT

56° AB

67° BB

21° AT

.322"

268

231

106

054.106 E

33° BT

67° AB

67° BB

33° AT

.330"

280

239

106

054.106 G

36° BT

70° AB

66° BB

40° AT

.322"

286

231

106

054.106 H

33° BT

66° AB

66° BB

33° AT

.375"

279

248

106

054.106 I

33° BT

69° AB

73° BB

35° AT

.420"

285

258

106

054.106 J

48° BT

79° AB

79° BB

48° AT

.383"

307

266

106

054.106 M

42° BT

70° AB

75° BB

47° AT

.403"

302

266

106

054.106 N

46° BT

80° AB

80° BB

46° AT

.392"

306

270

106

054.106 O

48° BT

79° AB

79° BB

48° AT

.357"

307

282

106

054.106 P

48° BT

85° AB

85° BB

48° AT

.410"

313

280

106

054.106 Q

53° BT

89° AB

89° BB

53° AT

.430"

322

289

106

054.106 R

54° BT

71° AB

85° BB

38° AT

.432"

305

279

108

054.106 S

52° BT

71° AB

88° BB

41° AT

.465"

303

281

108

054.106 T

60° BT

73° AB

86° BB

41° AT

.428"

313

281

108

BT = Before Top Dead Center. BB = Before Bottom Dead Center. AB = After Bottom Dead Center. AT = After Top Dead Center.
To order European Motorworks camshafts, click here.

Important installation and break-in instructions.

1. Coat the camshaft lobes and lifter heads with quality cam lube (Torco MPZ cam lube) to protect the lobes and lifter faces from scuffing, galling and wear during start-up. If possible, break-in engine with Brad Penn Racing Oil SAE 30 Break-In Oil - this oil contains Zinc, which is recommened for tappet cams for proper break-in.

2. Start engine quickly without excessive cranking.

3. Run engine at 2000-2500 RPM for 30 minutes.

4. Change oil and re-adjust valve lash (aluminum pushrod = .004"–.006" lash, steel pushrods = .001"–.002").