Hi All,

 

I have booked my VRS TDi in for a remap at the end of the month (Revo Stage 1)

I found an article stating that turbo upgrades are required beyond 220-240hp, which is roughly what most tuners quote as peak figures. 

Looking at dyno graphs and social media posts, most people are sitting around the 220-225hp mark.

 

Has anyone experienced any reliability issues since having their car mapped? The article makes it sound like the turbo will have no headroom and EGT's will be high.

 

 

 

 

 

 

 

I had a DTUK box on my car and ended up taking it off because I kept causing limp home mode and the engine acting daft.

 

I've seen those above DSD videos and it does show how limited the tuning of the CUNA engine is unless you pay stupid money.

 

he best thing if you're worried about the reliability is to ensure you get a custom map done. That way, the tuner can check how your car responds to a change in the map and make adjustments accordingly.

 

I've other fish to fry at the moment, but when things are sorted, I endeavour to get a DSD custom map on my car.

I too had a dtuk box which when my car was under 10k miles was a pain in the bum and kept going into limp mode. I tried several programs and still had loads of issues. I decided to give it another go when the car was at 20k and have never had a problem with it and have used a number of programs. I can't work it out but it's still on at 45k and the car is running fine with that and a pedal box. 

I had DTUK and switched due to it delivering poor performance and opted for Revo. 231bhp/516Nm and no issues so far. Drivability is greatly improved and performance is what Skoda should have given it out the box. 
 

Also had Revo on a mk7 GTD 5 years ago which again had no issues and ran for 35000 miles with the software until I traded it. 

52 minutes ago, Towelie said:

231bhp/516Nm and no issues so far.

 

you been on a dyno to get those figures?

1 hour ago, tunedude said:

 

you been on a dyno to get those figures?

Yes. They’re posted on my project thread. 

No problems with the DSG running that torque? ( Or is it a manual? )

Had a s1 map 9n my tdi vrs for 3 years, no issues whatsoever in 80k miles 

My only worry with the increased torque is the effect it has on the DMF. Mine is DSG and some standard cars DMF have failed. You would have to avoid doing lots of accelerating hard in high gears and drop down a gear to ease the strain in the gearbox. Also consider a DSG tune to make best of the power if you are DSG. The gearbox has a torque limiter and can reduce the power.

Edited 23 May, 20215 yr by Ecomatt

On 22/05/2021 at 09:34, BogdanB said:

No problems with the DSG running that torque? ( Or is it a manual? )

Mines a manual

On 22/05/2021 at 13:36, stever750 said:

Had a s1 map 9n my tdi vrs for 3 years, no issues whatsoever in 80k miles 

 

That is good to hear, which company/software did you use?

 

On 21/05/2021 at 20:28, Towelie said:

I had DTUK and switched due to it delivering poor performance and opted for Revo. 231bhp/516Nm and no issues so far. Drivability is greatly improved and performance is what Skoda should have given it out the box. 
 

Also had Revo on a mk7 GTD 5 years ago which again had no issues and ran for 35000 miles with the software until I traded it. 

Thanks for the feedback, certainly sounds like Revo is the way forward.

 

On 21/05/2021 at 17:04, arnold said:

I too had a dtuk box which when my car was under 10k miles was a pain in the bum and kept going into limp mode. I tried several programs and still had loads of issues. I decided to give it another go when the car was at 20k and have never had a problem with it and have used a number of programs. I can't work it out but it's still on at 45k and the car is running fine with that and a pedal box. 

Thanks for the info.

 

On 21/05/2021 at 16:55, tunedude said:

I had a DTUK box on my car and ended up taking it off because I kept causing limp home mode and the engine acting daft.

 

I've seen those above DSD videos and it does show how limited the tuning of the CUNA engine is unless you pay stupid money.

 

he best thing if you're worried about the reliability is to ensure you get a custom map done. That way, the tuner can check how your car responds to a change in the map and make adjustments accordingly.

 

I've other fish to fry at the moment, but when things are sorted, I endeavour to get a DSD custom map on my car.

Thanks for the reply. Definitely something to think about.

Full background, I also had a DTUK box on it for a while prior, but got fed up of check lamps and limp modes, so went with a local tuner who installed a Quantum Tuning map. I initially thought that it triggered a much shorter regen cycle, but we ran it map on and map of with the DPF phone app monitoring everything, and found it to be no worse than stock.

 

EDITED - it was NO worse than stock not NOW!

Edited 24 May, 20215 yr by stever750

48 minutes ago, stever750 said:

Full background, I also had a DTUK box on it for a while prior, but got fed up of check lamps and limp modes, so went with a local tuner who installed a Quantum Tuning map. I initially thought that it triggered a much shorter regen cycle, but we ran it map on and map of with the DPF phone app monitoring everything, and found it to be now worse than stock.

It is a side effect of tuning. The more diesel you inject to increase the power. The more ash and oil residue is created. This will fill up the dpf quicker and cause it to regen more. 

12 minutes ago, Ecomatt said:

It is a side effect of tuning. The more diesel you inject to increase the power. The more ash and oil residue is created. This will fill up the dpf quicker and cause it to regen more. 

Typo in my original post. It will generate more ash when it's using more fuel, but it's an accumulation, so unless you accelerate to a higher speed every time, then you won't be using more fuel (in fact my mpg improved). probably a bigger factor will be around the quality of the map and how well it manages air flow to fuel rate.

4 hours ago, stever750 said:

Full background, I also had a DTUK box on it for a while prior, but got fed up of check lamps and limp modes, so went with a local tuner who installed a Quantum Tuning map. I initially thought that it triggered a much shorter regen cycle, but we ran it map on and map of with the DPF phone app monitoring everything, and found it to be no worse than stock.

 

EDITED - it was NO worse than stock not NOW!

What was the regen cycle like ? ( how many miles / kms between regens )

Anything between 350km and 550 km. Occasionally it would self regen as it were under load uphill if the gas temps got high enough, but that was quite rare. Tbh, the app should be something you should use if you're driving a diesel, as it will indicate the cumulate ash collection, so you'll be able to monitor the life expectancy of your dpf. It's worth bearing in mind that it's not actually measuring the ash production directly, the values are inferred from a bunch of other sensors, so it's possible that after a remap, the algorithm is assuming a state inside the dpf which is inaccurate. At best this means more frequent regens than required, much worse is that it doesn't do it often enough, and then you'll only realise when the dpf pressure sensor warning is activated as it's full of soot. Not heard of that being a problem mind you, and I searched for a while on the subject at the time.

This is kinda off-topic, but I'm getting only about max 350kms when driving mostly outside the city and anywhere from 150-200km while driving in the city. Using the VAG DPF app, and the regens are always getting triggered by the soot mass calculated.

What might be the culprit to gettings such low mileage between regens compared to yours? ( The filter got cleaned recently due to it being clogged )

56 minutes ago, BogdanB said:

This is kinda off-topic, but I'm getting only about max 350kms when driving mostly outside the city and anywhere from 150-200km while driving in the city. Using the VAG DPF app, and the regens are always getting triggered by the soot mass calculated.

What might be the culprit to gettings such low mileage between regens compared to yours? ( The filter got cleaned recently due to it being clogged )

Is it stock or remapped? I'd only be guessing at the reasons tbh, have you tried a different driving style? Might be worth noting the EGTs off the app, mine were always around 550 Deg C during an active regen, and would need to be around 450 minimum to do a passive one.

Stock car, tried from ECO to Sport, results are mostly the same. It's just that the soot mass calculated creeps up steadily. During an active regen the EGT goes all the way to 650. As for the passive regen, it's almost impossible with this car I guess, since the EGT only goes past 400ish on long inclines or when you keep it floored.

 

My car was remapped at 10k miles by JBS Auto Designs in Sheffield. I bought it at 32k and it now has 78k on it with no issues. Pulls like a train and no clutch/DMF issues.