Brad The Bike Boy: Ducati DS Cam profile comparison

Monday, May 1, 2023

Ducati DS Cam profile comparison

DS version of the 2V Cam profile comparison -> Click here for link using the same rig as previously modified very slightly to take the M659 head. And prompting me to buy a new degree wheel.

The DS cams I have to hand are the M659/696/796 8P and the 1100Evo 10B. George at D Moto sent me a pair of 3V, which are the early 1000 cams. The later 1000 cams are 7V, and i believe there must also be another version as there are still 3 active # numbers for 1000/1100 cams with the same specs, and one superceded.

The physical difference in the cams from early to late is the large bearing journal on the LH end. On the later cams it is narrower and further out, and requires a different cam end cap. As below. 10B on left, 3V on right.

The specs as per the manuals, etc and as measured as below. I don't have any of the bottom 3 cams to check for now.

I suspect that the 8P and 3V are the same profiles, with the lobe separation opened up (less overlap) for the bigger 1000/1100 engines. The Evo cam is quite a bit bigger.

Comparing all:

The 8P and 3V.

And the 3V and 10B, showing how much bigger the Evo's 10B is.

3 comments:

getindustrialproducts said...: "Thanks for explaining the differences between the early and late cams. Could you elaborate on how the bearing journal changes impact the engine's durability or maintenance?"
cartridge type bag filter manufacturer
Axial Flow Fans manufactrurer; December 23, 2024 at 10:12 PM
onlinepromotionhouse22@gmail.com said...: "I appreciate the mention of the different # numbers for 1000/1100 cams. Do you have insights on why these specs remain active despite the variations?"
Air Ventilation System Manufacturer
Pulse Jet Bag filter manufacturers; December 23, 2024 at 10:13 PM
varshakush said...: "Your analysis of the DS cams is spot on. Could you provide more details on the rig you used for this comparison? It sounds like an interesting setup."
pulse jet bag filter manufacturer
Structural Steel Tubes in Indore; December 23, 2024 at 10:14 PM

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