Here you go gang. I've hit the jackpot and fond some more information on the Bosch VP44 Injection Pump. Now we can at least see what's in the pump a bit more...

:popcorn:

I didn't know the  4 cylinders  used the vp44  pump..  I thought they  went from  old style  rotary,  then  either  p7100 or  rotary,  then  cp3.   

In fact,   the  cp3 16 valve  4bt  was  out  in ~1999.        Ah, well,      it's a pretty big  world,  with  lots of   different  end uses.

 

That   'cam'  that actually   follows the  roller in the  'high pressure'  side...      I'd  think  that could be up  for  possible   'tweaking' by the  aftermarket/ full tilt  guys.    (not saying  there isn't  a  lot   that can be done   electronically  already!)   

 

It'll be nice to  see  actual  parts  on the bench!     Good thread.

The injection pump on my 02 TDI Beetle is a Bosch pump with an ecm mounted on top of the pump...it looks suspiciously similar to a VP pump.Just a little bit smaller, and a few less fuel lines.

Here's a picture of an actual diaphragm.  Its the one on the far left that looks like the letter C.

 

 

 

You might want to check out this thread...

http://forum.mopar1973man.com/index.php?/topic/8021-ive-recieved-the-vp44/

ok,  now that  I've  got  some  serious  searching done on  'yotas'..(yah,  I just  bought one...sue me  ha)    I see their  4cyl  diesel  1vz te     has  VERY similar   IP  to the  vp 44.     It's    similarly   controlled   (timing and   fuel amount)  with   inputs  from   IAT,  exaust temp,  boost,  and  throttle  position.   via   ecm.       lookin at it  you'd swear its  a mini  version of our  VP44     (horizontal  rotary with a little  'box'  with wires on top)

 

NO,  this motor  was never  allowed in the states..  too bad for us, the consumer,  but  GOOD  for the  big three!

I would love to have a 4 cyl diesel in a yota.

The 4bts are pretty popular in the mud trucks, yota bodies with big lifts/tires and half ton axles.