Update on the noise from front wheels:
When I took the car to the garage for the brake rotor change, I also had them check out the noise. The owner of the garage took the GT for a long test drive, and told me the noise was from the tires - not from the bearings or the gearbox. It turned out that there was a peculiar, slightly uneven wear of the treads (was not related to wheel alignment) that was causing this noise. He said this could be because of the stiffer suspensions. We did a tire rotation and moved the front wheels to the rear and the noise is gone now.
Upgraded Brake Rotors to Tarox G88
One of the weaknesses of the GT is the very poor brake. I had changed to Brembo red pads and set the "Brake Assist" setting in VCDS to "Strong", the braking improved a lot compared to the stock brakes. However, there was severe brake fade when the brakes got hot - especially after driving down the hills, and I had a very scary moment due to this brake fade. Also there used to be vibrations while braking at highway speeds.
So decided to do something about this.
Initially I was in the opinion that the poor braking was due to the drum brakes in the rear and wanted to explore converting to rear discs. However many experts suggested that in a FWD car, most of the braking is taken care of by the front brakes, and upgrading the front brake system should be more than enough. Also converting to rear discs has its own technical problems like proper component matching, brake balancing between front and rear etc. So dropped the idea of rear disc conversion (I may still re-visit this in the future) and decided to upgrade the front brake components.
Talked to many GT owners and some enthusiasts who had done lots of experiment on brakes. For a good brake system, both rotors and pads have to be good.
Rotors:
The general opinion was that the TVS rotors used in the GT are not of great quality and are not very good in performance when they become hot. I also found that there are drilled and slotted rotors which help in dissipating the heat by creating vents for hot gases to escape. Following were the options I had for rotor upgrade.
1. Brembo OE replacement solid rotors
2. Brembo slotted rotors
3. Brembo drilled rotors
4. Tarox G88 slotted rotors
Again, while talking to various Polo and GT owners who had used all these rotors, found that the Brembo slotted rotors and drilled rotors were prone to warping soon. That left me with Brembo OE replacement rotors or Tarox G88 rotors. Fellow GT owner and TBHP member Robi had upgraded to G88 rotors. I asked him about his experience with these rotors and he said he was very happy with the performance. So, I decided to go ahead with Tarox G88 rotors.
Pads:
It got a little complicated when I had to choose the pads. There are many high performance pads available, like EBC yellow stuff, Tarox Corsa etc. However, none of these pads were available for the Indian GT. In the latest GT's (not sure from which year), they changed over to TVS calipers which required a different type of pads (called Type-2), whereas the previous GTs had the Euro spec calipers and pads (Type-1). Very few pads were available for Type-2, like Brembo red pads, Brembo black pads and EBC Ultimax. As the Brembo red pads that I had on my GT had almost 50% of their life left, I decided to continue using them. When time comes to change these pads, I will consider EBC ultimax pads or maybe other performance pads may be available for Type-2.
Ordering the Rotors:
Once it was decided to change to Tarox G88 rotors, I contacted the dealer in India who quoted 44K. I found that these rotors were available in Tarox UK website for 245 Euros with a shipping cost of 93 Euros. This would cost approximately 25K. Considering a duty of 30%, the cost would still be 32K. So, I placed the order from Tarox UK website. Following is the link where I placed the order.
http://www.tarox.co.uk/product/front...9-1-2-tsi-g88/
The rotors arrived in a week, and as expected, I had to pay a customs duty of 8.4K.
Installation of Rotors:
Took the car the same weekend to KR Motors in Coimbatore and had the rotors installed. I also got the brake fluid changed to Dot4+ which cost 1.4K. A few pictures of the installation.
The package.
Inside the package, the rotors wrapped in polythene bags.
Close up view of the part number 0234
The OE rotor(s). For 11K run rotors, these had too many grooves. Compared to this, the rotors in my Jetta that has done 40K are still going great. This itself is proof of the very poor quality of the rotors used in the GT.
OE rotor removed and everything cleaned
Tarox rotor installed
With the wheels on
Initial Impression:
I have driven about 500kms after the rotor change. I was told it would take about 200km for the pads to bed in. I have changed the "Brake Assist" setting in VCDS back to "Normal". With this setting, I find the braking to have improved significantly. The braking now is much more powerful than the previous OE rotors + Brembo red pads with Brake Assist set to "Strong". I have tested the braking from 100kph, and the car just stops. Sometimes, it feels like the car has hit a wall.
Having said that, I still need to evaluate the performance under the following conditions:
1. Need to check if the brake fade is gone after driving down hill
2. Need to check if there is vibration while braking at highway speeds
3. Long term performance after say 10,000kms
I have a Mysore drive coming up this weekend which will have twisting roads that will have lots of braking and also Dimbham ghats to test brake fade after downhill drive. Will update my experience next week.
What Next:
Now that I have sorted out the suspensions and braking, it is time for a remap!