plunger from a pump with diferent rotation?pump speed? - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• plunger from a pump with diferent rotation?pump speed? by carrizog60 on 24 Jul, 2011 11:07
• hi
  
  in the search for the 11mm plunger do i need to find one that the pump goes right(R?) or for just removing the head is not a concern?
  
  thanks
• #1 by burn_your_money on 24 Jul, 2011 11:11
• It needs to be the same direction
• #2 by carrizog60 on 24 Jul, 2011 11:23
• ok,thanks...
  
  edit:
  for education purposes,why is the rotation important when we just want the head?
• #3 by carrizog60 on 24 Jul, 2011 11:36
• and what about pump speed?
  i noted that bigger plunger pumps usually have lower rotation speeds,how much can we go before damage?
  most are rated for 4000 or 4500rpm(engine),if i rev it more bad things happen or is just a matter of avoiding that rpm´s for long periods?
  
  
  
  thanks
• #4 by regcheeseman on 25 Jul, 2011 03:45
• Yeah, I'm intrigued about the rotation direction issue - I don't see how it matters?
  
  Also the pump speed is the gov setting and would have little bearing on the rotational limits of the piston/pump assembly.
• #5 by carrizog60 on 25 Jul, 2011 05:04
• Quote from: regcheeseman on 25 Jul, 2011 03:45

  Yeah, I'm intrigued about the rotation direction issue - I don't see how it matters?
  
  Also the pump speed is the gov setting and would have little bearing on the rotational limits of the piston/pump assembly.
  

  
  might have to do with the location of the spill ports on the plunger?
  i have tdi gearbox,at 3000rpm i am cruising near 150km/h give or take so i dont reeeealy need to rev past 5000rpm but when launching sometimes i just take it up there...