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  • #1

    TDI performance

    Hey guys I have been reading up and doing my homework on my 02 TDI jetta. I am having somw problem knowing what the best way to go about performance in steps. I am turning to TDI owners out there to help me out. I have installed my PP520 injesctors. I hope to have to Computer(Upsolute) down ASAP(next trip to Calgary and when Simon can do it). I am finding a terrible loss in power right now. I am thinking its due to the increase in fuel and not enough air into the cylinders. After the computer should I be thinking Intercooler? If so SMIC or FMIC? I have heard the battles for both. I want to know the truth. What other mods should I be looking at? I am unsure about VAG COM, Intakes, VNT 17 turbo. I would also like to stop the crap from collecting in my intake from the EGR. Any ideas around this? I have read about by passing it but needing VAG COM to stop the error codes. I hope others out there know of my frustration. I am lost and confused and seem to be getting no answers by doing my own research(about 20 hours).
    Thanks Ryan, Lethbridge AB
    Tags: None
  • #2
    Re: TDI performance

    a bunch of us have vag-coms. simon should be able to tweak you egr with his when he does your upsolute chip. I also turned down the injection quantity setting to cut back on smoke with the big injectors. Get a boost gauge too.. with big injectors, you will be getting bad (and unhealthy) boost spikes. You will likely want a boost valve to control this. Check http://boostvalve.com/ or http://www.dawesdevices.com/boost.html. From what I found in comparing the two kinds, they will perform the same, both are tuned for a use on a TDI, but the boostvalve.com one is easier to adjust without disconnecting vacuume lines. Don't know why you would be loosing power though. Is it like limp-mode loss of power where you restart and you have power again? or not quite that severe?
    Last edited by stefan; 06-22-2006, 03:27 PM.
    Stefan
    -> '19 Deep Black Pearl Alltrack
    -> '05 Urban Grey Passat Wagon TDI.
    -> Past rides: '14 Allroad, 06 Mazda5, '98 Jetta K2, '01 Jetta TDI, '91 Mazda B2200, '81 Toyota Cressida
    -> FutuRe Ride...??!

    Comment

    • #3
      Re: TDI performance

      The loss of power I think is sue to either boost spikes or heat issues. It seems if I step on it I will get great power then nothing. Car does a big jerk from power loss. Then it will catch again when I shift gears. Plus oll the black smoke out the back. Its like watching a city bus take off. James Bond and a smoke screen thing going on.

      Comment

      • #4
        Re: TDI performance

        I just figured out I posted this in the wrong section. Sry guys.

        Comment

        • #5
          Re: TDI performance

          yeah.. get a gauge on there and see what your turbo is up to. you'd hate to damage it. Intake heat shouldnt be too much of a problem. My stock intercooler keeps up with chip and .205 injectors. Adjusting thw IQ setting with a vag-com will clean up the smoke a lot, without loosing too much torque. Simon had an 'optimal' setting he suggested to run mine at, and it has worked so far.
          Stefan
          -> '19 Deep Black Pearl Alltrack
          -> '05 Urban Grey Passat Wagon TDI.
          -> Past rides: '14 Allroad, 06 Mazda5, '98 Jetta K2, '01 Jetta TDI, '91 Mazda B2200, '81 Toyota Cressida
          -> FutuRe Ride...??!

          Comment

          • #6
            Re: TDI performance

            I do have a gauge. I have been watching it as of late and notice very quick spikes and sudden drop offs. I am sure its running way to rich.

            Comment

            • #7
              Re: TDI performance

              whats your max boost? i was getting up to 28psi with no boost valve. you shouldnt really go over 20psi.
              Stefan
              -> '19 Deep Black Pearl Alltrack
              -> '05 Urban Grey Passat Wagon TDI.
              -> Past rides: '14 Allroad, 06 Mazda5, '98 Jetta K2, '01 Jetta TDI, '91 Mazda B2200, '81 Toyota Cressida
              -> FutuRe Ride...??!

              Comment

              • #8
                Re: TDI performance

                You should take those injectors out until you have the propper programming as you are just wasting fuel. As for the power lose it could be your MAF or a clogged intake. I have been hearing mixed reviews about front mounts and I think unless you have an upgraded turbo it is useless (some even say dangerous to the turbo). As for the EGR you want to have the duty cycle turned down with a vag-com and look into doing some breather mods for the crank case vent.
                Where have you been doing your research? you can find most answers in 5 minutes or less on the tdiclub.com
                Name: Brent
                His: '04 TDI Golf Mods: None If it's smoken it ain't broken
                Family: '15 Jetta Sportwagon
                Fun car: '92 Blue Karmann Crabby Cabby Mods: Coils, front and rear swaybars, LED interior lights and some other old things.

                Comment

                • #9
                  Re: TDI performance

                  what is this breather mod you speak of?
                  Stefan
                  -> '19 Deep Black Pearl Alltrack
                  -> '05 Urban Grey Passat Wagon TDI.
                  -> Past rides: '14 Allroad, 06 Mazda5, '98 Jetta K2, '01 Jetta TDI, '91 Mazda B2200, '81 Toyota Cressida
                  -> FutuRe Ride...??!

                  Comment

                  • #10
                    Re: TDI performance

                    Been doing most of my research on TDICLUB. Liek I said I think I am getting confused with everything. Or did I say that? My peak boost isnt over 15-18 PSI. Now for some reason my gauge isnt smooth. Meaning the needle seems to stick some.
                    I am mostly wanting someone who has done some of the mods that have been mentioned to reply. As far as CCV breather mods...I have read so much on them and different ways of doing it all. Who has done it and what did you do. EGR I have read can be clapped of or should be rerouted so there is no exhaust coming back into the system. .

                    Comment

                    • #11
                      Re: TDI performance

                      im not up on egr mods. i have turned down the duty cycle on mine with my vag-com, but thats it. I did have a clogged intake and fouled MAF when I bought my car (65000km), and was hitting limp mode because of it, so this is possible. (I also cooked a turbo by about 75000km :( ) Could the uneven boost also be a sticky vnt actuator? Stonewall had told me if you can move the actuator by hand smothly, its good. But these can get sticky. Could it be something more simple like a boost line to your gauge is loosing pressure (just guessing now)?

                      is there any way for you to get a scan to see if anything is leaving a code?

                      Anyways, get the proper programming, check for any codes that may have been thrown and get that sorted out before you do other mods, in my opinion.

                      What i have is this:
                      -01 TDI w/ Standard upsolute program (not the modified one for .205 injectors)
                      -.205 injectors
                      -boost gauge and boost valve
                      -egr duty cycle reduced
                      -IQ reduced

                      For non engine mods I threw on GLI suspension.

                      I've raced around with a vag com hooked up, and with a oem intercooler and turbo, everything works fine.. not to much heat.
                      Stefan
                      -> '19 Deep Black Pearl Alltrack
                      -> '05 Urban Grey Passat Wagon TDI.
                      -> Past rides: '14 Allroad, 06 Mazda5, '98 Jetta K2, '01 Jetta TDI, '91 Mazda B2200, '81 Toyota Cressida
                      -> FutuRe Ride...??!

                      Comment

                      • #12
                        Re: TDI performance

                        Thanks Stefan,
                        I am getting the upsolute done Monday in Calgary from Simon. I am hoping this is my main problem. I do need to get my intake cleaned out as it is on 170K. Never been done before. Cant find anyone to do it for under $600 here in Lethbridge. I dont feel like spending the time myself and doing it. I will get the comp done then clean the intake. Do the CCV mod and I hope to find someone with VAG COM. I have no idea how to use it and would be a littel concerned about screwing something up till it was demo'd to me. I hope to find someone that can help me out with this. The EGR duty cycle will have to be reduced.

                        Comment

                        • #13
                          Re: TDI performance

                          You don't see much over 15psi not chipped. Just make sure to check the vnt acctuator when the turbo is cold lol. As for cleaning your intake it is worth it to do it yourself, it is a messy job but it will only take you a couple hours. As for a CCV mod I think Simon had a hose off the crank case straight into a can of fresca Really it doesn't matter how you vent it there are about 10 or so walkthoughs on it. This is the link you need to be looking at http://forums.tdiclub.com/showthread.php?t=60705
                          Name: Brent
                          His: '04 TDI Golf Mods: None If it's smoken it ain't broken
                          Family: '15 Jetta Sportwagon
                          Fun car: '92 Blue Karmann Crabby Cabby Mods: Coils, front and rear swaybars, LED interior lights and some other old things.

                          Comment

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