pump shop poll

well do ya?

  • Total voters
    64
CTDYoungGun said:
Not sure what there really is to explain, other than a Bosch 20hp stand WILL spin a "big" 13mm pump at full tilt up to 4000 engine rpm (2000 test stand rpm). Anything beyond that just shows the mechanical inefficiency of the pump from what I've seen. They will lean out slightly, but they still pump equally from cylinder to cylinder. The biggest thing to watch on calibrating these pumps is to be sure the pump will fuel equally (cylinder to cylinder) at idle and at full tilt. However, a pump doesn't have to be spun to ridiculously high rpm to show the change in flow from cylinder to cylinder. 99% of this change can be seen and compensated for below 3500 engine rpm (1750 stand rpm).

There is way more involved in a well built p-pump than just a 13mm b&p and a big test stand. Cam profile, lift to port closure setting, springs, etc...they all make a huge difference in how consistently the pump fuels and how efficient it is in higher rpm fueling. Not to mention, the technician calibrating the pump can make or break a pump.

And yes, there are a LOT of pump shops like ours that don't do the volume of Columbus or Scheid, but there are a whole bunch of 13mm pumps built and ran nationwide that run very well, and a 100hp stand is not necessary to do this. JMHO
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X2!!!!!!!!!!!
 
hey CTDYoungun.. or seth? you work at st.joe diesel or DPE in savannah? Just wondering cause i always go to dpe and its like 15 miles from me. sorry to get off subject
 
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