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Engine Specific Info and Questions => IDI Engine => Topic started by: carrizog60 on July 24, 2011, 11:07:17 am

Title: plunger from a pump with diferent rotation?pump speed?
Post by: carrizog60 on July 24, 2011, 11:07:17 am
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
Title: Re: plunger from a pump with diferent rotation?
Post by: burn_your_money on July 24, 2011, 11:11:58 am
It needs to be the same direction
Title: Re: plunger from a pump with diferent rotation?
Post by: carrizog60 on July 24, 2011, 11:23:53 am
ok,thanks... :-\

edit:
for education purposes,why is the rotation important when we just want the head?
Title: Re: plunger from a pump with diferent rotation?pump speed?
Post by: carrizog60 on July 24, 2011, 11:36:40 am
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 rpmīs for long periods?



thanks
Title: Re: plunger from a pump with diferent rotation?pump speed?
Post by: regcheeseman on July 25, 2011, 03:45:02 am
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.
Title: Re: plunger from a pump with diferent rotation?pump speed?
Post by: carrizog60 on July 25, 2011, 05:04:23 am
Quote from: regcheeseman on July 25, 2011, 03:45:02 am
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...