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Do many people mod the 2.5TDI engine ?

Discussion in 'A4/S4 forum(B5 Chassis)' started by Tobiasnugent, Jan 31, 2011.

  1. Tobiasnugent
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    Tobiasnugent New Member

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    just wondering if many people mod these or are people more into the petrols etc ?

    If so whats the best things people do etc no silly expensive stuff

    I cant imagine many people mod them but thought id ask see what type of figures and things people have i see alot of people with things in there sigs but not sure which is petrol diesel etc etc, this is my first diesel car and im use to hondas with no torque so this makes a change haha!
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  2. tdia4
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    tdia4 TDIPOWARRR

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    I belive there 150bhp standard, with a remap you should see 180bhp.

    If you look in the diesel section theres a guy whos done a fair bit to his 2.5tdi and i belive hes got it running around 220bhp or something like that.
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  3. tdia4
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    tdia4 TDIPOWARRR

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  4. sk8xtrm
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    sk8xtrm New Member

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    hi mate ive been looking at these myself and curious of tuning potential. A chip makes a massive diffrence apparently. For example more-bhp.com quote for the 150bhp model increase to 177bhp and torque from 310nm to 385nm. Other than that id be curious what else, exhaust etc?

    How do you find the car by the way? Fast..ish? or slugish! Im doing over 50miles everyday with my 1.8t but with my mods im really enjoying the power but sticking to 70mph id be better with a diesel :)
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  5. diffas
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    diffas Member

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    You can get out of 150hp 2.5tdi around 200-210hp with stock turbo and nozzles if the engine is in good shape. With bigger turbo and nozzles you go waay over that. 230-280hp.
    I'm targeting to 250kw...in some day with biturbo solution. ;)
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  6. adamss24
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    adamss24 Well-Known Member

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    That would be fjtwelve 260 Bhp+, mine isnt far off either. There's a lot you can do to a v6 tdi, swapping nozzles for larger ones and upgrading the turbo is a start. I dont really like generic remaps as they limit the torque low down (to protect the clutch) so a high quality tuning box from PSI or Steinbauer really does the trick. Swapping the turbo with the one from the 180Bhp AKE engine (has a larger compressor wheel) is a start and Iveco/Bosio race nozzles also return a healthy power output. The v6 has twin intercooler as standard wich are fine up to 270Bhp. The clutch is strong on these and the DMF will take a pounding. The diesel isnt built or geared for drag races but will really be in its stride on motorway where they pull the same in any gear. I have a GT2559 turbo fitted on me quattro (will be soon replaced with a BV 50 from the 3.0 Tdi as its better flowing and i got-it for a song) wich is a bit laggy but really good at high speeds. However my Iveco nozzles are allready maxed out even with the Steinbauer box turned to maximu. Later AKE engines also had a 3 plunger injector pumps wich can supply a lot of fuel but will only play ball up to a point. The biggest problem is there are not many people preppared to mod them pumps (same pumps were fitted on big 6L cummins engines in the states and there are pumps moddified to fuel over 1000 Bhp) as many diesel specialists will only put them back to Bosch specs ! Also by swapping the nozzles to larger units from lorries or tractors will need adressing in the tune/remap as the engine will shudder at iddle ! Thing is again, tunners know jack **** when it comes to a "custom" remap and strugle to work with- much easy to slap a generic map and charge hundreds for the privilege ! My v6 tdi quattro does 160 mph whilst still returning high 30 Mpg average...
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  7. sk8xtrm
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    sk8xtrm New Member

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    Wow im impressed what you can do with these engines. So to see 200bhp on these for example could you just remap and then??? can you just put in new nozzles with out any problems then or do they have to be mapped in?
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  8. adamss24
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    adamss24 Well-Known Member

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    Its better to start with a tuning box (some find it fine for a while) but you kinda get bored and want more ! Swap injectors and turbo THEN remap so the map can take in consideration the mods you added. Also removing the cats off will allow the turbo to spool nicely whilst still passing the Mot. Its not the Bhp thats impressive its the torque they put out- 400Nm+ from 1350 rpm's all the way to 4000 rpm's ! Pity there are not many off the shelf mods available but there are a few companies who offer hybrid turbo's wich are plug and play and good for 260Bhp. I would rather go with a tried and tested Garrett GTB2260VK turbo off the 3.0 Tdi audi a4 244Bhp as its good for over 300Bhp yet spools as fast as the stock blower !
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  9. diffas
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    diffas Member

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    Forget about shitty tuningboxes for real mate. Custom tuning on road/dyno is the thing.
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  10. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    just be careful of chocolate cams and folowers and self imploding fuel pumps if pushed.

    ^^ Adamss24 above knows hiz shiz listen to him, or read on FJtwelves or quattrojames in the B6 forum, both of those have had "experience" in these too
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  11. APTuning
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    APTuning New Member

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    Deffo stay away from plug and play tuning boxes. Do a google search and you will find out why. A proper remap is the only way forward.
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  12. adamss24
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    adamss24 Well-Known Member

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    Dont slate them mate, there are some really good ones out there but they are expensive! Me car done 190 Bhp on stock 150 Bhp engine with just a PSI Motorsport chip (i have the AMD printout). This is not a plug-in box but it goes into the ECU and triggers the advance solenoid + the quantity adjuster. Also the Steinbauer P-Box does exactly what they claim up to 40 Bhp/50Nm on a stock motor. Custom tuning is hard to get in uk Diffas, as you might know ! I have yet to meet someone who really know to "custom" tune a v6 tdi in uk ! Most geeks know how to flash a tune with a good tool but very few understand that engine in order to maximise its potential...and to take in consideration mods !
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  13. diffas
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    diffas Member

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    That is pretty weird that you don't have good v6 tdi tuners there. Only problem we have here is to get car run smoothly on idle. :)
    YouTube - A4 2.5 TDi idle lope - idle lope :D
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  14. adamss24
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    adamss24 Well-Known Member

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    V6 isn't soo popular within the modding world here ! And as i say, there are not many overhere who really know how to tune these engines... I will go to Netherlands next week to pick 2 sets of race 683 Bosio nozzles, drove fjtwelve a6 the other day and it puls really well- harder than mine in 3rd gear. I have maxed out me nozzles allready and the car is running too lean. Thing is i would like to tune my car by myself but i dont feel confident enough to tackle the job myself and i dont wanna brick my ecu ! I had tried once to upload a map onto a friends car with a kwp2000+ interface and i have managed to upload mp3 files (!) onto the ecu ! Cost me dear that experience so i let the professionals do it !
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  15. diffas
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    diffas Member

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    Yea well. I've new dynosheets;
    [​IMG]

    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 2.5tdi dyno 203kw 570nm - YouTube


    Last time I posted the problem with the idle - turned out it was bad nozzles. Now runs pretty smooth.
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  16. adamss24
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    adamss24 Well-Known Member

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    Impressive ! Well done... What's the full spec on your lump ?
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  17. diffas
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    diffas Member

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    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
    -autobahn 1.8t fmic kit
    -SRE-clutch kit
    -3bar map
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  18. Mackers
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    Mackers Member

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    i've got a 2.5 Quattro, and i've found a "localish" company called remap wizard, who'll get my 150, upto 187 for a sniff under £200, but is it worth de-catting 1st, and if so how do i do it, as i can't find any de-cats at all,
    also is it worth putting a air filter on the car (i've seen a pipercross viper kit, NEW at a really silly price (so much so, i think it's an error ) :D
    finally i've mailed that many people about remapping, can anyone tell me where does a map and a before and after rolling road.
    Many Thanks
    Wayne
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  19. diffas
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    diffas Member

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

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    ah right, ok, thanks, jus thought this £200 filter was good, hehehee, guess i'll stay STD then.... Actully how do performance PANEL FILTERS rate??
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  21. adamss24
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    adamss24 Well-Known Member

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    Spend your money on a better turbo, the gt2052 from the 180Bhp drops right in ! The allroad v6 tdi injectors are the biggest fitted by the factory so they are good for about 220 Bhp. More than that and you'll need to go aftermarket: Bosio, Iveco, Cummins,etc.
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  22. diffas
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    diffas Member

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    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 usually have limited 52mg /str iq for some reason and therefore unable to
    have more than 195-200hp output power.

    Best way to tune it up is add cummins cr nozzletips, adjust them and add bigger turbo like 2056v or even with 60 comperssor.
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  23. diffas
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    diffas Member

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