DATSUN 4 & 6 CYL. OHC PROFILES

            The 4 and 6 cyl. Datsun L-series grinds are identified by the letter stamped on the back of the rear journal.  We can supply lash caps for all of our L-series cams.

ROCKER RATIO=1.45:1    THE FOLLOWING DURATION NUMBERS ARE MEASURED AT THE CAM WITH A RADIUS FOLLOWER.  THE NUMBERS AT THE VALVE WILL BE DIFFERENT BECAUSE OF THE RADIUS ROCKER ARM GEOMETRY.

 

            4 CYL. STOCK SPECS.                                      6 CYL. STOCK SPECS.

LETTER   LOBE CENTER  CAM LIFT                LETTER  LOBE CENTER  CAM LIFT

    U                 107                  .278                             A                     109             .288

    A                 109                  .278                             B & F              109             .275 INT 

    B                  109                  .288                                                                        .288 EXH

    C                 109                  .278 INT                      C                     109             .289         

                                                .288 EXH

GRIND NO.

SEAT DURATION

.050” DURATION

CAM LIFT

LASH

APPLICATION

STOCK

238

191

.272

I .010

E .010

MILD 4 & 6 CYL CAM

STOCK

245

196

.288

I .010

E .010

STD 4 & 6 CYL CAM

STOCK

250

203

.288

I .010

E .010

WILDER 4 & 6 CYL CAM

IMPROV

250

211

.288

I .010

E .010

GOOD IMPROVED STOCK CAM

U-20

255

224

.327

I .010

E .010

GOOD TURBO CAM FOR L-SER. MOTORS

66509-15

HIGH LIFT

266

224

.318

I .010

E .012

PERFORMANCE. MAX FOR STOCK SPRINGS & FI

6909-11

278

223

.293

I .008

E .010

HOT STREET. 2-7K 9.5:1 HEADWORK, CARBS, SPRINGS

70-15

280

224

.360

I .010

E .012

9.5:1 MAJOR HEADWORK REQ.

7106-15

284

227

.330

I .010

E .012

AUTOCROSS 10+:1 HEADWORK, SPRINGS

7109-14

284

240

.320

I .010

E .012

WILDER THAN ABOVE, FOR SERIOUS AUTOCROSS

73506-15

294

254

.330

I .010

E .012

RACING ONLY

12:1  4-7K

            Other 295-314 deg. grinds available for racing applications, but we recommend that they only be ground on new castings (billets).  

If you have a car in mind, which is not listed, please call us!