SO you say you want POWER!!!!

EASY! Making more power in a diesel engine is, at its most fundamental level, simply a matter of burning more fuel.

Or... "I just want my car to run like new again!" 

Easy! Find your car in the selection guide below to find the right nozzles.

Here is some information about the difference in flow of these nozzles relative to the Original Equipment models. For this comparison, the point of reference will be the nozzles that come from the factory as Original Equipment in the A4 Tdi 90 hp ALH motor, with a 5 speed transmission (150P 706 nozzles.)

Orifice size was actually measured using an electron microscope, courtesy of Geoff Williams "GeWilli"

Scanning Electron Microscope Pictures

"Known as" refers to how the nozzles are commonly referenced by TDi enthusiasts based on the published OE specs.

Original
TDi Engine 		Nozzle Type
"Known as"
Published size
Actual
Orifice size
Flow Relative
to ALH 5-speed
90 HP ALH
Auto Transmission		 150P672(OE)
"0.158"
0.135mm
~80%
90 HP ALH
5-speed Manual		 150P706(OE)
"0.184"
0.170mm
100%
90 HP
1Z/AHU		 SPRINT 357/442
"0.184"
0.185mm
105%
110 HP
Euro AFN/ASV		 SPRINT 520
"0.205"
0.205mm
120%
POWERPLUS 520
+7-10 HP vs SPRINT
+20-30 Ft-lb vs SPRINT
Race520
0.260mm?
180%
 
SPRINT 357 is a good entry-level upgrade for A4 automatic with 11mm injection pump. 
POWERPLUS 520 is more than SPRINT 520 Best all-around upgrade for all besides A4 automatic
  
All POWERPLUS models make less smoke than the same size and next larger size SPRINT in the same application relative to the output increase gained. This is due in part to the better atomization which results from the unique hole geometry and tighter tolerances achieved with the POWERPLUS design.