Bosch A pump questions

moresmoke

Well-known Member
Location
E ND
What is the max fuel delivery for a pump with 9.5mm plungers? Also how hard is it to reverse the rotation of this pump?
 
Max delivery depends if the plungers have a retard start notch. Some cams can be run in reversed direction depending on the profile, but remember the firing order will change to 142635 if it was 153624 before.
 
(quoted from post at 13:03:34 09/24/14) What is the max fuel delivery for a pump with 9.5mm plungers? Also how hard is it to reverse the rotation of this pump?

What exactly are you trying to do? Which pump are you starting out with or I should ask what engine is it off of and what do you want to put it on?

Like Dieseltech said depends on whether the pump has retard notches or not. I never messed with a 9.5mm pump, but my 10mm deere pump with retard notches and a quick delivery cam is maxed at about 400 cc's.

From what a pump guy told me a case cam can be run either direction, you just hook the lines up depending on which rotation as dieseltech said. He also meantioned when he has cams ground you can run them either direction because the lobe becomes symetrical.
 
Trying to replace a PSB with a pump from a 4BT. I know they turn
different speeds, can come up with something for a drive.
 
moresmoke,
What engine is this on? Depending on the engine there might be factory parts off later engines that can be used to get the pump drive speeds down there where the A pump will work.
 
Trying to replace a PSB with a pump from a 4BT. I know they turn
different speeds, can come up with something for a drive.
 
Factory drives for Roosa pumps are available, but turn opposite
the 4BT pump. Looking at the Cummins pump because they are
available for a reasonable cost. Just trying to figure if there is a
worthwhile gain. The original pump spec is 42cc per 500
strokes.
 

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