Going to check it out even tho I am not interested in tuning the N/A but I always stream after good R32 material????There's a superb thread on vortex by a chap called powerdubs who has exetnsivley documented NA tuning in all its glory. IIRC it was on a Mk4 so slightly more gain opportunity but still relatively small and capped results for quite a high investment.
Need to get another one of these againI believe this is the last upgrade on my list so far. Last but far away from least. Next 2 or 3 posts are going to be covering my future plans with the R32, my new daily and tons of new pictures
POLAR FIS ADVANCED PARAMETER SYSTEM
Polar FIS+ is the plug and play "system" that plug's into CAN-BUS plug and then the CAN-BUS plugs into Polar FIS+.
It provides all sorts of data on main display. You can see total of 36 parameters in real time such as oil temeprature, speed, fuel liters, DSG temperature, exhaust temperatures etc etc. Basically everhing that has a sensor!
You can also track your times such as acceleration from 100-200, 0-200 etc etc.
You can also diagnose the car and set parameters so you don't have to use VCDS everytime
Probably one of the best upgrades done to the car you can check the Polar here.
The Polar FIS pluged into CAN modul
How the screen looks with some quick snaps
yeah that's what I thought alsoEverything with the PolarFis is programmable. Every button on steering wheel can do what you want it to do. The unit is pluged in CAN-BUS plug (uder the steering wheel, where the relay panel is) so taking away bluetooth itself or the buttons for bluetooth on the steering wheel are not logical at all.
Appreciate someone who knows things about brakes as I damn love them probably the most of all parts on the car! Oh, not selling TTRS ones, moving the callipers to the rear axleWow. You do not mess about do you. I have to ask a few questions. The calipers are , err, huge, so what about the number and size of the pistons. You know where I am going on this one. The o.e piston has an area of around 2500mm2 ( 57mm piston ) Lots of people run the Brembo 18z with a total piston area of around 2750mm2 and find that the master cylinder copes just fine, with perhaps just a touch more pedal travel. If the ones you have bought are up in the 3000mm2 region, then you may need the TTrS 25mm master cylinder . Available but a bit expensive so you may have to budget for one .
Next, unsprung weight. This may be of no real concern to you as as you are creating something that is for cruising and admiring. I completely understand that , but if you want to use it in anger on some twisty , undulating stuff, then the unsprung weight makes a huge difference . I also imagine that , having bought this brake upgrade at , frankly, a bargain price , you might even get most of your money back if/when you sell your 370mm TTRS stuff. That will be sought after .
And the rears. Same comments about unsprung weight and master cylinder , especially the latter given the combination of front calipers the size of Switzerland and some 4 pot rears , you might even go to a Touran/Q8/ cayenne master cylinder at 27.4mm ( I think )
I am really interested in your rear brake solution. The real bugbear is the handbrake . Forge have a solution that Barspin on here used The Cayenne uses some 4 pots on the rear but I do not know how the handbrake works on those vehicles . ( ie I have not looked ) Ideally , it would be nice to find a 4 pot which has a built -in handbrake , weighs nothing and works on 350mm discs . .
And finally, 400mm discs under 19" wheels. Boy , that will be close . Looking forward to seeing pictures of this .
Best of luck. I admire your ambition, imagination and enginuity.
Oh then your math about 18Z's was correct.Evening,
The new calipers you plan to use are not as large , in piston size, as I had expected and I agree that the increase in braking performance comes from an increase in torque caused by the increase in radius. I was doing my piston comparisons based on just one side of one caliper. The 18z calipers that I rebuilt had 30 +34+ 38mm pistons which comes to 2749mm2 compared to the o.e of around 2500mm2 as you say . We do agree as if you multiply the above by 4 ( 2 piston groups and 2 calipers you get your 10,990mm2 . In any event, the proof of the concept comes when you use it , but I always find it helpful to do the maths first to check that what I am planning has at least a theoretical basis on which to proceed.
As for unsprung weight , the issue is mostly about the ability of the damper to control the motion of the hub/brake / wheel and ancillary items so attached. However, in terms of overall performance the impact is less, it is important when the road surface is less than perfect .
I looked again at the kit that Forge do for the rear brake , using their 4 pot caliper , two piece rotor and a clever arrangement that enables the handbrake to operate by locking the hydraulic line thus preventing the pistons from retracting . Neat but costs over £1500, and you already have the calipers from the front so apart from new discs and the adapters, you are there .
I too am a bit keen on brakes and share your enthusiasm for them.
Keep your plans coming . Great stuff.