999s - hottest cam I can get?

Discussion in 'Technical Help' started by lordmoonpie, Sep 16, 2012.

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  1. I want to stick the hottest cam I can in a 999s engine. I've been recommended to use a 998s cam but don't know why...can anyone shed any light on this choice or tell me if there is a hotter cam still that I can safely install in the 999s engine? It'll be a full on race engine so the wilder the better! :upyeah:
     
    #1 lordmoonpie, Sep 16, 2012
  2. #2 Cranker V2, Sep 16, 2012
  3. top tip, your'e going to need four..............
     
    #3 andyb, Sep 16, 2012
    • Like Like x 1
  4. Err thanks Andy but no I'm not :biggrin:
     
    #4 lordmoonpie, Sep 17, 2012
  5. hows that work then?
     
    #5 andyb, Sep 17, 2012
  6. you can put 749R or even the kit R cams in any testa motor. You will need to change the cam followers and possibly the valve guides tho. Would produce shedloads of power : )
     
    #6 JerryXt, Sep 17, 2012
  7. its not as simple as that .........
     
    #7 andyb, Sep 17, 2012
  8. One inlet one exhaust, what else do I need? ;-)
     
    #8 lordmoonpie, Sep 17, 2012
  9. Why not Andy? They're all very interchangeable on the testastrettas aren't they?
     
    #9 lordmoonpie, Sep 17, 2012

  10. well unless you are building a supermono then you do have two cylinders so 2 inlets 2 exhausts....=4
     
    #10 andyb, Sep 17, 2012
  11. Ask Jerry hes the RS expert......:rolleyes::tongue:
     
    #11 andyb, Sep 17, 2012
  12. What's the beef here then Jerry - Andy says you know all about it :)
    I've got a 999s donor, it' going to have a stroke crank and custom pistons and rods and I'm hoping a certain lovely ducati dealer is going to find me some 998RS cams as of this afternoon....what else do I need to change? Would be very grateful for the advice :upyeah:
     
    #12 lordmoonpie, Sep 17, 2012
  13. No flies on you Andy - that's exactly what I'm building - losing the back cylinder...:wink:
     
    #13 lordmoonpie, Sep 17, 2012
  14. What you need is someone with a stroked custom piston 999 engine to tell you all about it..........
     
    #14 andyb, Sep 17, 2012
  15. Like Jerry huh?
     
    #15 lordmoonpie, Sep 17, 2012
  16. Possibly issues with clearances on the piston, so you wouldn't be able to run max compression, but beyond that, it's a cam.

    You'd be better off with the whole head ideally. Cylinder studs, bearings are all in the right place....
     
    #16 JerryXt, Sep 17, 2012
    • Like Like x 1
  17. well er no..............more like me..:wink:
     
    #17 andyb, Sep 17, 2012
  18. hmm sounds good - tell me more then Andy, did you do all the work yourself? Did you get the heads flowed?
     
    #18 lordmoonpie, Sep 17, 2012
  19. no and yes

    jeff Green built the engine:upyeah:..............now the bore piston rod crank combination..........now that would be telling...:wink:......CJS for the head work:biggrin:
     
    #19 andyb, Sep 17, 2012
  20. Bore piston rod combination is sorted thanks - just got to choose the cams then decide on head work...btw no I'm Simon, how do you do :)
    I know Alistair of course but wanted to do my own thing rather than try and re-create what he's done. Got a vision you see and it's mine all mine LOL
     
    #20 lordmoonpie, Sep 17, 2012
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