pump shop poll

well do ya?

  • Total voters
    64
I PM'd a couple people since I need to send my Pump out.. one replied.. so I'm going with CDS :woohoo:
 
What about Hypermax? Not big into trucks, but they are in the tractor world....
 
i may not be able to make big power but

LOOK HOW BIG I CAN MAKE MY AVATAR!


ps - that was funny rich, but not nearly as funny as the ass in the hole
 
Theres a guy down here in indiana who tuned a 14mm pump on the machine in his garage.
 
My vote is definately with St. Joseph Diesel....awsome group over there....do lots and lots of business with them....
 
BUDDHA POWER John Russin can build what ever you think you can burn !:kick:
 
Reading through the posts I think that the conversation has quickly shifted topic. The way I read it, Don wants to know who has test stands capable of accurately flowing a big pump at its full capacity, not what shops build big pumps.

Don, I didn't vote because I have no valid opinion. I don't own a big pump and haven't even had one put on a bench yet. There's no need to skew your poll with nonsense. I do however believe that there are likely quite a few more big stands around the country than what the little diesel performance community is aware of.
 
there are shops all across the country with test stands

i have been in two shops that had stands that no way in hell would i ever let them touch anything goin on my truck

just because someone has a test stand and can flow a pump does that mean that they can flow a big pump at full load and 5500 rpm?

i dont know how much hp that would require

its now obvious that the majority here believes that it takes less than 20 hp to do it

i wonder how much resistance it takes to get the pump shaft to slip in the gear?
 
DTanklage said:
there are shops all across the country with test stands

i have been in two shops that had stands that no way in hell would i ever let them touch anything goin on my truck

just because someone has a test stand and can flow a pump does that mean that they can flow a big pump at full load and 5500 rpm?

i dont know how much hp that would require

its now obvious that the majority here believes that it takes less than 20 hp to do it

i wonder how much resistance it takes to get the pump shaft to slip in the gear?
Click to expand...

HMMMM that would require sheering the key that is alot of resistance!!!!!!
 
when i set my timing i did not remove the pump completely but i do not see how there could be a key and a keyway

if there were the shaft could only go into the gear in one position making it impossible to change the timing

or am i missing something here?

i changed the timing on my truck and know you can move the gear on the shaft (once the press has been released)
 
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Smokem said:
What hp is the 815? How many CC's do you want to stand the 13mm with?
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It is 15kw or 20.1hp. A former employer forgot to turn the test fluid on and the head in a vp44 seized and it turned everything inside to mush and didn't even slow the test stand down. So i figured it would have plenty of power to spin a big flowing pump. It'll do 12cyl pumps fine and H pumps so id imagine a 13mm 600cc's or more p-pump wouldn't be outta the question. Especially because the bosch711 did mine at a little over 400cc's and its only 14.74hp.
 
DTanklage said:
when i set my timing i did not remove the pump completely but i do not see how there could be a key and a keyway

if there were the shaft could only go into the gear in one position making it impossible to change the timing

or am i missing something here?

i changed the timing on my truck and know you can move the gear on the shaft (once the press has been released)
Click to expand...

The gears used on the Cummins are a tapered fit and can be installed in any position, but the pump's shaft is cut for a woodruff key. I would imagine they would put a key in the slot when it is on a pump stand, but I don't know that for sure.
 
mondtster said:
I would imagine they would put a key in the slot when it is on a pump stand, but I don't know that for sure.
Click to expand...

Yep, you are correct...that's the only beneficial info I have for this thread so now I'll sit back and watch
 
Yeah I am almost certain Hart's has a test bench I mean they do alot of pumps for tractors around here and have a few of thier own tractors that run extremly well.
 
CTDYoungGun said:
...that's the only beneficial info I have for this thread so now I'll sit back and watch
Click to expand...

ahh come on seth, tell em what you told me about spinning a big pump up with a 20 hp stand

your explanation is the only reason i did not vote 'yes'
 
DTanklage said:
ahh come on seth, tell em what you told me about spinning a big pump up with a 20 hp stand

your explanation is the only reason i did not vote 'yes'
Click to expand...

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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