2010 Jetta TDI DSG with Stage 2 - this is the first official DSG dyno we have.
More information here: http://forums.tdiclub.com/showthread.php?t=319229
So far I would recommend a DSG tune even with a Stage 1 performance tune. It helps maintain smooth shifts. My DSG tune development will begin soon. HPA has a DSG tune readily available.
Here's a video of smoke from a 2010 Jetta TDI with an aggressive Stage 2 tune (334 wheel torque) with a straight pipe (no diesel particulate filter, etc.): http://www.youtube.com/watch?v=6ajR6ZTKEnQ
Concerning the smoke issue with a Stage 2 tune or any +30HP tune in general:
- The smoke is more visible if you remove the DPF and/or catalytic converter. Stage 2 is 100% smoke-free if the DPF is still in place, as evidenced by this video.
- The smoke normally starts appearing only if you press the accelerator pedal at least 80%.
- The smoke opacity can vary from car to car depending on fuel quality, climate, etc.
- Raising boost further will reduce smoke (some tuners may attempt this), but at the potential cost of turbo longevity.
- If you have DPF delete and if you are concerned about smoke while you're racing the car, then I recommend the Stage 1 tune instead of Stage 2.
- We tuned a TDI with GTB2260VK turbo and it was virtually smoke-free at ~230bhp. Proper airflow modifications (hint: an intake "upgrade" may not help) can give you even more power potential without adding smoke.
- Removing the DPF (for off-road use only) can still be beneficial for lower EGT (good for turbo and oil longevity) and for lower fuel consumption.
Last edited by Mark@MaloneTuning; 06-09-2011 at 06:07 PM.
Great to see that dyno up in public now I will add it to the dyno sheets page for comparison.
Peter- As Mark mentioned thier is a few things that can be done to reduce smoke, but it will reduce power. We can work something out to get it sorted out. Also, as others mentioned your foot controls the fuel economy and if you are using that extra power then your fuel economy will go down. Try keeping the throttle from going down no more than 1/3 the distance when taking off and increase it slower. See if that helps a bit and get back to me.
As for the MPG's I'm pretty sure I'm getting the most I can out of it. Doing a lot of hypermiling stuff as before the tune. I'm still rev'ing it out every now and then (like before) to blow the crap out. At least thats my reason for having a bit of fun. When I get ready for another trip up north I'll let you know and hopefully I'll have some more money to spend.
2000 Jetta, Utah, Utah County. No diesel emissions testing. Before they got rid of the testing, it didn't even have to have a cat as long as it passed the opacity requirement for that year, which was almost impossible to fail.
AKA: No cat required.
Although, the exhaust smell is a lot more pungent (gets sucked in the AC at stop lights) and that's almost enough to make me want to put it back on.
I've been tracking every tank and run the same route so I'm sure of the results. Remember I'm getting 44.6 MPG for the life of the car. That's in the top ten on Fuelly for my year with a wagon. If you look at my stats on Fuelly.com you'll see that temp is the biggest factor for me. I'm in NJ and the cold/winter fuel cuts my numbers better good. After such a big jump in HP I'm amazed that the MPG did'nt go down more. Of course I was hoping I'd see an increase like other people and that was a factor in my decision to go with the deletes.
Peter, when you get a chance we can look into retuning for a lower stage and or few add on options for you to remove some of the smoke and smell.
As others have mentioned the downpipe is the biggest gain, but the flapper valve back exhaust I offer does show improvements of egt temps and power over the oem setup along with a huge weight savings!
Performance Diesel Engineering's exhaust offers a few options over borla's and banks axle back piece:
1) My exhausts go all the way back to the downpipe offering a true CAT back exhaust style. This allows you to run a full 2.5" exhaust system where as the borla will still have the restrictive oem system in place.
2) My exhaust has a resignator/ high flow Muffler in place. This quites down some higher pitch noise and passes most requirements for exhaust inspections.
3) I have designed the exhaust to be adjustable for normal / GLI / and TDICUP so it is more universal than the borla or banks (others require cutting and rewelding for fit).
Since there was quite a bit of discussion about Stage 2 + DPF delete smoke in this thread, I figured it'd be appropriate to include a video here:
The smoke is visible only at or very near WOT (wide open "throttle").
From another forum, regarding the recent 23H1 ECU flash: http://forums.tdiclub.com/showthread...=318495&page=5
"My Revo software was removed by the dealer when I had them flash the ECU, but I expected this. I went back to the Revo dealer.. they looked at the new software code and told us they'd never seen the new code before. So we scanned the whole ECU and sent Revo the file. A month later (just last week) Revo tells us that my ECU has been locked out like >2010 cars and they'll need to bench the ECU to scan it and get it flashed"
Would this be a concern for your DPF delete tune?
I had my ECU flashed and can tell that the Revo tune is gone/deminished, but drivability has improved, along with a slight improvement in MPG.
Last edited by Hank101; 06-10-2011 at 10:03 AM.
I, like many others, are very interested in this but had some other questions related to it. Since it is a bit of money I'd like to really nail down the benefits. I'm not doubting anything said, just trying to understand the functions of each component. If the stage 2 tune is the primary reason for the increase in drive-ability and the downpipe is really only needed to open the door for future power adders then it'll help me plan out my mods more efficiently.
It seems like most of the people that get this downpipe usually purchase a stage1/2 tune to go along with it. Having done a bunch of research on ECU tuning, I know that it really changes the driving dynamics of the car (almost always for the best). I'm curious if anyone has done just the DPF delete downpipe and DPF delete tune from Malone, without the additional stage1/2 tunes?
I remember reading another post earlier (forgive me for not quoting whoever you are) that stated that starting out in first no longer has that bogging "issue" and the throttle was much more responsive (in addition to the power and mileage increases). I'd really just like to see if that was due to the upgraded tune or the downpipe or a combination of both. I'm not so worried about if the downpipe gives me power or not but I'd like to iron out the exhaust restrictions and hopefully improve the lower "off-boost" responsiveness. I'll rely on the tune to handle the majority of the power increase.
I, myself, will be going with a stage 2 tune anyway with downpipe and full straight exhaust (when finances allow) but would like to see which of these added benefits are attributed to the downpipe and which are due to the tune. Sorry if this has been addressed already.. I'm looking for user experiences if possible.
I remember reading that just a straight pipe back from the catalytic converter got rid of the bog. It's driving me nuts on the TDI. I'm thinking I want to do the DPF delete but CA SMOG requirements are horrible and I wouldn't pass. I think the best option for me would be a Stage 1 tune with a cat-back muffler? Any recommendations for Nor-Cal ECU tuners?
Last edited by ToeBall; 06-29-2011 at 08:58 PM.