TRIUMPH SPITFIRE PROFILES

            We strongly recommend having these cams nitrided after grinding because of the wear problems they are known for.  The valve lifters almost always go bad so it would be best if you sent them along with your cam so we could measure and regrind them.

TAPPET DIAMETER .687  OR .800              ROCKER ARM RATIO = 1.45:1 (AVG.)

 

GRIND NO.

SEAT DURATION

.050 DURATION

CAM LIFT

LASH

APPLICATION

MKI

240

200

.215

I .008

E .010

STOCK LOW COMP. 1147cc

1500cc

247

247

210

205

.244

.242

I .010

E .012

STOCK 1500cc CAM

64510-12

258

209

.252

I .011

E .013

PERFORMANCE 1147, 1296cc LARGE TAPPET ENGINES.

6610-15

264

217

.262

I .013

E .015

2 STEPS UP COMP NEEDS TO BE RAISED.

7010-9

280

228

.263

I .010

E .012

HOT STREET 9.5:1  SPRINGS, HEADER

71508-18

286

245

.305

I .019

E .021

AUTOCROSS/RACE 10:1.  GOOD HEAD.

7508-12

300

250

.323

I .014

E .016

AUTOCROSS/RACE

11:1.

M7708-13

308

255

.321

I .014

E .016

ROAD RACE 12:1, 5-7500 RPM MUST DYNO TUNE.

7708-12

308

263

.348

I .016

E .018

ROAD RACE. MUST DYNO. 5500-7500 RPM.

7806-14

312

266

.328

I .017

E .019

GT3  13:1

 

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