Tech:Engine/K Series/Camshaft
Camshaft
There are two stock camshaft profiles. The first is found in Sprinter motors with twincarbs (K-B, 3K-B), it's an 18-58 (256 degrees). The second is found in all other K motors with solid lifters, and is a 16-50 (246 degrees) with 0.338" intake valve lift and 0.356" exhaust valve lift.
The camshaft is modified by grinding the lobes, you don't have to buy a new cam when you want different valve openings.
There are many, many aftermarket cam grinds available for these motors. Here are some popular ones:
Tighe 112: 20-60, 260 degrees, 0.423" valvelift (best for 3K engine, most torque in 4k/5k, 6500rpm peak power)
Tighe 104: 25-65, 270 degrees, 0.423" valvelift (best for powerful 4K/5K, alot of torque, 7500rpm peak power)
Wade 169x: 30-70, 280 degrees, 0.405" valvelift (custom cam in Doug's rally car, slightly more top end, slightly less torque than above)
Camtech 609: 33-64/72-32, 277/284 degrees, 0.435" valvelift (this is Stewart's cam, peak power 8000+rpm)
Waggott 605: 21-61/63-19, 262 degrees, 0.347"/0.343" valvelift (stage 1 grind, Alex uses this one, peak power 6500rpm)
Note: Tighe 104 cam does not appear to have an aggressive/lumpy idle - Justin...
Article by Superjamie / Medicine_Man
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