$200 paperweights??

[brad black]

the base circle is a lot smaller than a 750 cam, which is smaller than a 900 cam too, and you need to lengthen valves 1mm for a 900.  well, you need opening shims in the range of 5.2 from memory, or 0.2mm larger than ducati supply.

the piston to valve clearance is the killer though.  a 750 with the reliefs machined 1.5mm has a touch less clearance than a 900 std.  and a 900 std has about 1mm too little for these cams.

they lift around 0.14mm per degree, whereas most of the ducati cams max at 0.1mm per degree.  so they get the valve a lot closer to the piston in the 10 to 20 degrees atdc area than a std 900 cam (1.5 to 2mm more lift), and 2.5 to 3mm more lift at that point than a 750 cam.

[wataboy]

Thanks for all the info fellas.  So the general consensus is 'run 'em like they are'.

Like some of you I've been wishy/washy on this cam grind but since my riding consist of country roads and small towns sound like they should be just the ticket for more low to midrange torque.

The master plan right now includes:
these cams
v2's refurbished by either JPrecision or Meyers Performance with new seats, guides, porting and longer valves for the cams
Ignitech module
JE 92mm HC's with top cropped about 3mm per Brad's findings

Already got fcr41's with open airbox.

Will keep ya'll posted on the way.

[koko64]

Found this old thread via search.

Never heard about the outcome. Pity. Anybody know this member or hear what the outcome was for his motor build? Interested to know how the motor combination worked out. I'll pm Wataboy and ask him to post the outcome.

[wataboy]

Perfect timing Koko,
Well...kinda.
I just got my heads back from MBP last week. No, Guy's not that slow with his work...some fun funds had to be found. Here's some before & after pics. I didn't take any of the ports as there are pics galore on here and other places. He used the DP cams with his collets and added the external oil lines and adjustable cam pulleys. I'm not sure if he used longer valve stems or larger shims. I'll have to ask. After my front end work recently these'll probably adorn my mantle till next winter. But hey, at least they're here.

















  

[koko64]

Looking forward to seeing how the motor performs and your impressions.

[koko64]

Any progress?