prj tuning

He who stops being better stops being good.


  • Head ported by JNL Racing
  • Std. ADU engine


  • 3.4 sec FATS at 1.7 bar

Ruslan’s UrS6


  • K26 turbo (bigger turbo planned)
  • 044 fuel pump
  • 630cc Siemens Deka injectors
  • 4th generation LPG system
  • RS2 exhaust manifold
  • Automatic switchover of mapped ignition, boost and fuel in Motronic ECU for LPG
  • Up to 30 degrees of timing advance under boost on LPG
  • Decreased fuel consumption and increased power on LPG

Tuning a Diesel


This post will be a little bit different to the one-car-per-post format. I want to give people a little overview of what a “Stage 1″ tune is and just describe the general approach to chip tuning.

One of my cars is MY2000 Opel Omega-B 2.5TD, and I will use this one as an example.

What makes these cars a little special, is that the engine is lifted from a BMW. It is the intercooled version of M51D25, slightly detuned.
In return, BMW’s using this engine are fitted with GM’s AR35 automatic transmissions.
However, Opel in their infinite wisdom used the AR25 box on the diesel and the AR35 on their petrol engines. The 25 and 35 are just torque limits – 250nm and 350nm accordingly.

I bought the car with a blown trans for peanuts, and luckily the only difference between the AR25 and AR35 are uprated internals. So I acquired an AR35, retained the torque converter and bell housing from the AR25 and hey presto, I have a transmission that can handle 350nm. After fixing the boost leaks (the intercooler on this Omega was like swiss cheese) the car can be tuned for more torque and power.

First step was to find the ECU and check how boost is controlled.
The ECU turned out to be in the fusebox under the hood, and just slides out. The connector is a typical JPT-55 used in most Bosch applications of the 90-s (remember, the engine was developed in 1991!), and the control unit itself is a Bosch MSA-11 type or in other words – ancient by even 2000′s standards when the car was built. Forget any flashing, only the manual approach will lead to results.
Around the turbo there are no fancy solenoids – the boost is mechanically controlled by a spring to about 1 bar.
Read the rest of this entry »


Steve’s RS2


  • K26/K27 #6 turbo
  • H-Rods
  • EV14 510cc injectors
  • 044 fuel pump
  • Wagner EVO exhaust manifold
  • 3.3 sec FATS
  • 9.5 sec 100 to 200 km/h


Chester’s UrS4



  • K26/K27 #6 turbo
  • RS2 EM
  • 440cc injectors
  • HRC 290 LPH fuel pump
  • 4.3 sec FATS with 1900kg weight.

Toomas’ UrS4



  • K26/K27 #6 turbo
  • Block bored to 83mm
  • Toyota Supra 7M-GTE pistons, machined
  • BMW M50B20TU connecting rods
  • MC crank, machined
  • FMIC
  • RS2 exhaust manifold
  • 3″ turboback exhaust
  • Autobox to manual box conversion
  • Single mass flywheel with SRE clutch
  • RS4 MAF conversion
  • 440cc injectors
  • Uprated fuel pump
  • 2 bar at 3300 rpm in 3rd.
  • 250 km/h trap speed on One Mile Challenge
  • 380 hp at 55C IAT. 400hp and 600+ nm at 45C IAT. Realistic IAT is 20-30 degrees lower, so approx 450hp.



Kirill’s UrS6



  • 3071R / K26 #6 turbo
  • Fully balanced engine, but stock rods
  • Head ported
  • Uprated clutch
  • RS4 MAF conversion
  • Bosch 044 fuel pump
  • Siemens Deka 630cc injectors
  • 7A camshafts
  • Blitz FMIC
  • RS2 exhaust manifold
  • Modified inlet manifold
  • So far the car has run 12.6 1/4 mile with full interior, including climate control.
  • 441 PS and 574 NM on dyno


  • RS2 Hybrid turbo
  • Thick headgasket
  • 480cc Delphi injectors
  • Stock engine
  • A lot of suspension mods :)
  • The car was running some generic chips, and the result was 375 PS and 544 NM at 2 bar of boost.
  • After re-mapping the ECU, it made 392 PS and 577 NM at 1.8 bar boost on the same dyno. This also means lower IAT and EGT.

Richard’s Black RS2



  • Garrett 3071R turbo with 0.82 A/R hotside
  • Wagner Evo T3 manifold
  • Siemens Deka 560cc injectors
  • Bosch 040 fuel pump
  • Stock engine
  • 430 PS and 610 NM at the crank on the MRC dyno.

The Beginning

I decided it might be a good idea to start a blog, mainly for having a history of the various cars I’ve tuned.

It should be quite fitting to add the pic of three RS2′s I’ve tuned recently here :)