[Vwdiesel] How different is this from a VW turbo pump?

[dieseltdi at verizon.net]

Thanks for the information!  It is obvious that you have spent a bit of time on these things and know your stuff.  I was looking to pick up a spare turbo pump to get sent to the great white north to l et Giles mess with it to eventually go on my GTD project.  Hayden

On Nov 9, 2012, at 11:02 PM, "Andrew .Libby" <libbybapa at gmail.com> wrote:

> The reason I know all of those details intimately is because I use those exact pumps as base pumps for the mTDI pumps that I sell.  After sorting the governor spring, proper advance spring and range of motion, delivery valve length and proper sprocket offset they make EXCELLENT high performance mTDI injection pumps.  
> 
> 
> On Fri, Nov 9, 2012 at 9:55 PM, Andrew .Libby <libbybapa at gmail.com> wrote:
> It's quite a bit different from any of them.  The electronic TDI pumps are obviously completely different.  That eBay pump has a 20mm shaft instead of the 17mm shaft of the AAZ or 1.6TD.  The shaft is the length of the 1.6TD pump (AAZ shaft is longer).  There is not any stock VW sprocket that fits the shorter shaft (all the VW 20mm sprockets fit the longer shaft).  That eBay pump does spin the right way and the accelerator lever rotates the correct way.  Internally it is also quite different.  The dynamic advance spring gives a very different advance curve, the advance piston is different, the governor spring setup is a single un-caged extension spring and limits the rpms to approx 2500.  The camplate has MUCH higher lift and is much steeper.  The LDA lever is on the side opposite that of the VW LDA lever.  The delivery valves are the longer length which fits only the 90-97 1.6 and AAZ pumps.  There is no cold start advance accommodation.   
> 
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> On Fri, Nov 9, 2012 at 8:43 PM, <dieseltdi at verizon.net> wrote:
> http://www.ebay.com/itm/New-Bosch-Cummins-4BT-Turbo-Diesel-Fuel-Injection-pump-injector-3-9-/281016897916?pt=Motors_Car_Truck_Parts_Accessories&hash=item416de9917c&vxp=mtr
> 
> 
> “There are many men of principle in both parties in America, but there is no party of principle.”
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> “I do not know if the people of the United States would vote for superior men if they ran for office, but there can be no doubt that such men do not run."
> 
> “I cannot help fearing that men may reach a point where they look on every new theory as a danger, every innovation as a toilsome trouble, every social advance as a first step toward revolution, and that they may absolutely refuse to move at all.”  Alexis de Tocqueville
> 
> 
> Visit my website at:  http://mysite.verizon.net/resosxp8/mydieselpages/
> Proud owner of:
> 2004 Jetta GL PD TDI
> 1968 Beetle, my latest project, watch for details
> 1982 VW Jetta Coupe with GTD turbo diesel transplant (in progress)
> And many, many, many VWs; from a 1947 Beetle (13 Beetles total), to Vans (5 - 3 splitties, 2 bay window (both were campers), 1 Vanagon Westy, Rabbits (3), Karmen Ghia (1), Jettas (9), Passats (2), Dasher (1), New Beetle (1), Rabbit Convertible (1) and Rabbit Pickups (3) most now gone but not forgotten.
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“There are many men of principle in both parties in America, but there is no party of principle.” 

“I do not know if the people of the United States would vote for superior men if they ran for office, but there can be no doubt that such men do not run."

“I cannot help fearing that men may reach a point where they look on every new theory as a danger, every innovation as a toilsome trouble, every social advance as a first step toward revolution, and that they may absolutely refuse to move at all.”  Alexis de Tocqueville


Visit my website at:  http://mysite.verizon.net/resosxp8/mydieselpages/
Proud owner of:
2004 Jetta GL PD TDI
1968 Beetle, my latest project, watch for details
1982 VW Jetta Coupe with GTD turbo diesel transplant (in progress)
And many, many, many VWs; from a 1947 Beetle (13 Beetles total), to Vans (5 - 3 splitties, 2 bay window (both were campers), 1 Vanagon Westy, Rabbits (3), Karmen Ghia (1), Jettas (9), Passats (2), Dasher (1), New Beetle (1), Rabbit Convertible (1) and Rabbit Pickups (3) most now gone but not forgotten.