Polo GTI 2.0l tuning

[Sydneykid]

I haven't played with a 2.0l Polo GTi yet, but so far every other Gti and R (Golf and Polo) that I have played with simply have different boost curves to give the required power and torque. When I match the boost curves they make the same power and torque. For example add back the missing 2 to 3 psi of boost to a 169/350 Golf and they make 180/370, the boost curves match. Add ~4 psi to the 180/350 and they make 200/400 same as adding another 4 psi (making 6 to 7 in total) to the 169/350 and they make 200/400 exactly the same.

Not saying that there aren't other differences but most of the power and torque differences come from the original boost levels. Which, provided the turbo handles it, can be tuned over.

The Brudack cycle is simply camshaft timing, which changes with rpm, for example the early closing of the inlet valve doesn't happen at higher rpm. Has no real impact on power or torque.


Cheers
Gary

[ozmale]

Well i can tell you it is a very nicely made airbox with good quality silicone pipes, and the airbox fits perfectly. The turbo muffler delete is also nicely made and fitted perfectly too.

You can choose to run the airbox with or without the lid if you want some extra noise, but without the lid it will let suck some hot air in.

There is definitely some nice induction and turbo noise with the new setup. I have a few pics i will upload shortly.

Can I ask where you bought the CAI kit from. I am about to take delivery of my 2019 polo GTI. Love the sound of CAI's.
There seems to be a real lack of places to buy go bits for the Polo, "ECS Tuning" dont even have a listing for the Polo.

Chris

[MaXX]

So I’ve bitten the bullet and have ordered an exhaust, CAI, ECU and DSG tune for my Polo. It looks like the exhaust is the slowest part in arriving at 4-6 weeks away. FYI I’ve gone with the following.

Milltek GPF/OPF back exhaust with black tips - Milltek Sport Performance Resonated GPF/OPF-Back Exhaust System for Volkswagen

Leyo CAI kit - LEYO Motorsport | Products - Cold Air Intake System (disregard the link saying Tiguan, it’s for the Polo)

Etuners retune for ECU and DSG - Custom Tuning - Etuners Motorsport

Anyway, I’ll keep you posted on progress and results as they come to hand. I want a dyno run done when stock for comparison, but probably won’t be re-running between stages and will only do a final dyno run once everything is complete. The only other engine part I’m planning at this stage is a turbo muffler delete, but that’s not easy to get yet and won’t affect power much anyway.

It’ll be interesting to see how this all goes. I’m trying not to get ahead of myself, but am hoping for well more than a stock Golf 7.5 GTI. At hundreds of kilos less, that’ll make the Polo a proper stealth bullet that eats Golf GTI’s and scares R’s...and that was the plan from the beginning

After that, some decent rubber and maybe some brake attention. Not planning to track it regularly, so probably just some fast road tyres, some slotted rotors, and fast road pads.

[ozmale]

Very keen to hear how you go with the exhaust. Having a look at the Milltek looks like one of the things they have done is just removed the centre resonator. Also looks like you could fit it yourself.

As for the CAI, I made my own, doesn't look to pretty but certainly works, sounds great.




Chris

[MaXX]

That’s on you R ? Looks fine to me

edit: saw the picture file name. Forget I asked !

[ozmale]

That’s on you R ? Looks fine to me

edit: saw the picture file name. Forget I asked !

No, That photo is from my Polo GTI. I do not have a CAI on my Golf "R"

Chris

[MaXX]

Looks like a setback, production issues with Milltek. More likely the end of September now

[Lucas_R]

Have you guys seen the Polo GTI that Underground Performance tuned this week? Impressive gains - it would be a quick little car.

Dylan's Polo GTI AW on-board with UGP as... - Underground Performance | Facebook

[Lucas_R]

Can I ask where you bought the CAI kit from. I am about to take delivery of my 2019 polo GTI. Love the sound of CAI's.

These parts were purchased direct from MST in USA. (sorry for the late reply - haven't been on here much lately).

[MaXX]

So, booked for getting the CAI and engine/DSG tunes done in the first week in October. Hopefully that is enough time for the exhaust to arrive, but will go ahead without if necessary as that doesn’t significantly affect the basic tune (post OPF so it’s more noise than action.)

That is stage one. After we do that and have a poke around and see what might fit (turbo downpipe with high flow cat, bigger turbo etc.) there will likely be a stage two

[ozmale]

So, booked for getting the CAI and engine/DSG tunes done in the first week in October. Hopefully that is enough time for the exhaust to arrive, but will go ahead without if necessary as that doesn’t significantly affect the basic tune (post OPF so it’s more noise than action.)

That is stage one. After we do that and have a poke around and see what might fit (turbo downpipe with high flow cat, bigger turbo etc.) there will likely be a stage two

Be interested to see how it all goes. From my understanding no one has broken the code as yet to tune the 2019 polo gti engine. But doesn't mean it wont happen

[MaXX]

Mines the first in Adelaide I think, but it’s been done in Melbourne before. Time will soon tell

[h100vw]

We have tuned 3 at UGP. Check our Facebook page. Stage 1, 2 and DSG

[MaXX]

So, due to a few issues the plan wasn’t exactly followed this week. Some bad, some good, but overall I’m a pretty happy camper.

The Good

- The Leyo cold air intake went on. Looks and sounds great.
- A new model turbo muffler delete that fits is now available from Leyo, so that went on too.
- ECU tune done
- DSG tune done
- I got some cool billet shift paddles from MODE fitted. Hot bling, sure, but they do make manual shifting much easier. Pics soon.

The Bad

- Milltek have been a complete PITA to deal with, so we have cancelled the order for the exhaust. I won’t bore you with the details, suffice to say you shouldn’t get a different story every time you make contact with a company. The silver lining is I’ll probably just go full turbo back instead, and the UGP guys have demonstrated the benefits there. Thanks for the info h100vw.

The car dyno’d at 125kW ATW when standard, and now makes a touch over 147kW ATW. Given that the final dyno run was done under some pretty challenging conditions (a 35 degree C ambient day meant keeping the intake temps under 50 degrees C was impossible) it’d probably read closer to 160 on a friendly day. Zooming around today it definitely feels like that too...quite the angry little ant. And having the “vroom chshh tututu” noises through the CAI makes me laugh every single time I’m a very happy boy.

It was quite well behaved and is doing it easy, so plenty of scope to go further. A full exhaust and tune is the next obvious step, and we will see how it’s going for fuelling and so on after that. Then turbo, injectors, fuel pump...the usual slippery slope. TBH I might look at decent tyres and brakes next though, that’s one area VW saved money compared to a Golf GTI.

Many thanks to Callum at Haines Mechanical and Detail for doing all the work, and the guys from Leyo and Etuners for great products to work with.

[maxrob200]

- I got some cool billet shift paddles from MODE fitted. Hot bling, sure, but they do make manual shifting much easier. Pics soon.

.

The MODE paddles look quite interesting. Since you have done the hard yards, may I ask which models fit the current Polo GTi?