Raguvian
Autocross Champion
- Location
- Bay Area, CA
- Car(s)
- 2019 GSW 4MO 6MT
Anyone see this? If it works I might have to buy the ST41 kit...
You must not understand what they mean by different pistons.
Different size pistons mean a different diameter bore, so you’re not just swapping them out.
The difference between the gti and R piston sizes are so minimal 99% of drivers are never going to notice. What you’re saying is completely off pace for this thread as we ALL purchased the “wrong” brakes on purpose to save 50%...that was the whole point of this thread.
Go preach it to the thousands of vw & audi owners who run TTRS, TTS, Boxer S or any other BBK that’s not engineered specifically for their car.
To be fair the kit they sell is a bit smaller in terms of piston size, the size difference is actually quite significant as it's 34mm and 36mm pistons, whereas the R and S3 the stock piston size is 60mm which would be close to 40mm and 42mm pistons. So it does throw off the front bias a bit, however this can be offset by running more aggressive pads in the front and oem in the rears, which would help to increase your front rotor tq. However, your leg input in terms of lbs would still require a bit more force, which translates to a stiffer pedal due to the smaller piston area.
I have mk6 ST40 on my car, and can assure you the smaller pistons (which result in quicker action, not stiffer pedal) are not a big deal.
The improvement over the mushy boat anchor OEM floating calipers is night and day.
Yes fine for the street. Track use is 10000% different, awd + 400lbs heavier.The OEM brakes on my S3 are also used on the GTI w/PP. Those 2 vehicles are significantly different (weight, 2wd bs awd) yet the OEM thinks they're fine for both vehicles.
I have mk6 ST40 on my car, and can assure you the smaller pistons (which result in quicker action, not stiffer pedal) are not a big deal.
The improvement over the mushy boat anchor OEM floating calipers is night and day.
Correct me if im wrong, you have a GTI with the non PP brakes right? i can tell you 100% that it increases the pedal effort which in turn results in a stiffer feeling pedal (which i enjoy) as i currently have it installed in a R, under heavy braking in a straight line you do feel the back end get a bit wobbly, but i've tracked the car several times with it and for me it helps with turn in response. I did however have to run a more aggressive pad in the front vs in the rear to help with the brake bias.
Would i go this route again? No
Did i save a lot? Yes, however i may end up purchasing the correct calipers later on, so in the end i would have spent even more than the correct kit.
Exactly what I wanted, along with many othersYes fine for the street. Track use is 10000% different, awd + 400lbs heavier.
It was non PP, but I have Mk5 R32 rear brakes now and the bias is much better than with the OEM rears.
By adding more aggressive pads in the front you purposefully induced a brake bias...
because the difference you have to run is pretty crazy to keep it equal. Its basically needing to run something like hawk dtc-70/80 up front with oem rears to get close.Hence why I added an aggressive pad in the front as the car became more rear biased due to difference in piston size. So in order to reduce that rear bias and transfer more to the front an aggressive pad in the front was necessary. Not sure why that is so difficult to understand.
Hence why I added an aggressive pad in the front as the car became more rear biased due to difference in piston size. So in order to reduce that rear bias and transfer more to the front an aggressive pad in the front was necessary. Not sure why that is so difficult to understand.
You can use simple online brake bias calculators to figure out what you need to run to equal it back out.There can be many issues contributing to your rear end getting loose under heavy braking. You sound like and are coming off as someone who's done some track days and now thinks they know everything.
There can be many issues contributing to your rear end getting loose under heavy braking. You sound like and are coming off as someone who's done some track days and now thinks they know everything.