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  1. diffas

    Do many people mod the 2.5TDI engine ?

    Check out the dyno video with data graphics
  2. diffas

    Do many people mod the 2.5TDI engine ?

    Little update here too. Made some fueling upgrades and minor turbo upgrades on the wintertime. Did visit the same dyno to see comparable results. This time it was pretty decent power gains. Unfortunately car went to limp on the dyno but nevertheless it reached 469hp (4800rpm)/768nm(3800rpm). On...
  3. diffas

    New Project: A4 B5 V6 Tdi Quattro

    If you going to full 3". Add atleast good flow cat and some end silencer. I had one that had 3" in and two 2.5" out. Added flap to second output and it droped exhaust noise about -14db when closed. At track they measured before 103db and after the flap mod 89db. It was vacuum controlled by n75...
  4. diffas

    Do many people mod the 2.5TDI engine ?

    Grave digging here. I have not been much on the forum lately but i want to make upgrade post to this thread. Last few years i have slowly building my b5 2.5tdi with three turbos compound setup. I have currently runnin just bit over 400hp and i believe there is lot of power left on table. My...
  5. diffas

    Do many people mod the 2.5TDI engine ?

    I would not to be worried about running big power and big kilometers. My car is on everyday use and used on my daily job so last year I run with it almost 40k. I've done+ 210k in 7 years, so know what I'm talkin about. :D It's never good when you need to do some "tricks" to get fuel out, but...
  6. diffas

    Do many people mod the 2.5TDI engine ?

    Oh dear. What a old topic. :) These pumps are very mysterious. Pumps them selfs are not limited but but duration is limited. That means that you can bypass stock nozzle limits by changing bigger nozzles. So lets say most of the pumps are "limited" to 52-54mg/stroke. That is just calculated...
  7. diffas

    A4 2.5TDI QUATTRO 2000(W) AKN 150HP ENGINE BE CUSTOM TUNED

    It's still full custom tunable. You just need to do some little soldering to add chip sockets to your ecu. Then it takes few minutes to change software.
  8. diffas

    A4 2.5TDI QUATTRO 2000(W) AKN 150HP ENGINE BE CUSTOM TUNED

    AFB/AKN have msa15 ecu instead edc15 and therefore soldering work needs to be done.
  9. diffas

    Audi a4 B5 2.5tdi Starting Issue

    In most cases when starting with semi-cold/warm engine are caused by slightly late timed vp44. You can test it by unpluging the temp-sensor located left side of the pump and you will get full glow and nice start. :)
  10. diffas

    WHEEL FITTING

    Nice troll, Craig. :D Back to business... I looked my setups and looks like 9" wheels with ET37 are fine on front and ET34 rear with the same tire (235/40/18). When using 225/40 tires even ET40 is fine. If you are gonna ride ridiculously low I recommend to use 225 tires. ;)
  11. diffas

    WHEEL FITTING

    There are no problems fitting 9" wheels on A4 with correct ET. With 10" case is not that clear, but still possible. :)
  12. diffas

    98 2.5 tdi a4 - no boost from the turbo help

    Sounds like wasted MAF.
  13. diffas

    18 x 9 1/2 et 44 amg wheels

    Using spacers (approx. 10mm will do the trick) and 225/40/18 tyres and it will be ok. I'm currently running 9"x18" wheels with et37 front and et34 rear with 235/40/18 tyres on. Because running pretty downlow there are some rubbing appearing in my case. ;)
  14. diffas

    more boost? more diesel?

    You can digitally bleed and get higher boost replacing stock 2.5bar map with 3bar map. And more fuel with every-mod - some call it psi-box. :D
  15. diffas

    Do many people mod the 2.5TDI engine ?

    Took drive-by video to see smoking on full throttle: Smoke test - drive-by - YouTube About 16 - 16.5 AFR
  16. diffas

    Do many people mod the 2.5TDI engine ?

    Why drop in 180hp version? It's the same as 150hp version. Wasting your money. All the nozzles are same flowrate - old ones have 5x0.18mm and newers 6x0.16mm holes, difference is in pumps / ecu iq-rate. You will have same output power with 150hp and 180hp engines, 180hp and newer 2001-> engines...
  17. diffas

    Do many people mod the 2.5TDI engine ?

    Stock air filter is good for even bigger power. With cheap aftermarket filters you will do more harm than geting benefit of it.
  18. diffas

    tdi tuning questions

    With stock head, dss ultime 2 nozzles, gtb1756v you get around 230hp/500nm. That sure includes fmic and clutch upgrade. After that serious mods needs to be done, better cam 260/9.5mm, bigger distribution head, ported head and maybe even add gridle.
  19. diffas

    Do many people mod the 2.5TDI engine ?

    Nothing that much. All parts are almost stock, even they are from different engines. -base engine 150hp AKN -ported/cleaned heads BDG -pistons from AKE -stock/hybrid turbo with wheels: 44.5x60comp / 50x45turbine (from e61 bmw) -fuel pump with AKE distribution head -nozzles from cummins 5.9l cr...
  20. diffas

    Do many people mod the 2.5TDI engine ?

    Yea well. I've new dynosheets; 277/1.6bar and 267/1.5bar. We really needed to drop iq above 4000rpm because the emp is getting really high (2.5bar). But I think it's really good for that small turbo I have, gt2060v - means e61 beemer 30d wheels inside the stock turbo. Little video too; Audi A4...