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Just tried doing this with jack stands. Not enough of a contortionist. Recommend you have availability of a lift. Debating to try again through wheel well with rotor removed and caliper out of the way.
Nothing better to do this weekend so I took the wheels off and looked. From the picture posted on Alekshop the cooling duct bracket wraps around the LCA to place the axle/bearing cooling duct. Unfortunately the rotor cooling vanes wrap around the same LCA. So those will require modification unless the GT4RS ClubSport use different ones and thereby allow for both to mount in the same place.
Nothing better to do this weekend so I took the wheels off and looked. From the picture posted on Alekshop the cooling duct bracket wraps around the LCA to place the axle/bearing cooling duct. Unfortunately the rotor cooling vanes wrap around the same LCA. So those will require modification unless the GT4RS ClubSport use different ones and thereby allow for both to mount in the same place.
Looks like they rivet or screw the lower brake vanes to the bracket or something similar.
Saw that. OEM wraps around the LCA providing support front and back. Their solution only provides support on the front. There has to be a better way or why else did Porsche do it on both sides.
Looked again at the TPC video comparing street vs CS. There are no vanes on the rear of the CS, just the duct. The way it was explained for the front rotors is that you want to maintain a certain amount of heat in the rotor. Further looking at the pic from Alekshop (post #16 above) seems to confirm that the vane is more for aero purposes than cooling purposes. The video explains the underbody aero differences as well.
Additionally it appears that the vane is actually 2 pieces, 19 & 20 as shown in the pic. Maybe piece 19 could be modified so one doesn't have to affix 20 somehow to the duct.
You could make your own U channel out of sheet aluminum and bend it into the shape you wanted to send air up there. Then rivet it onto the top part of the bracket and you are all set. That piece is for rear brake cooling as well as a bit of aero. The duct does block much of that air so extending those veins with a bit of extra plastic might help with the brake cooling if the ducts were added.
Last edited by lovetoturn; 07-13-2024 at 04:31 PM.
You could make your own U channel out of sheet aluminum and bend it into the shape you wanted to send air up there. Then rivet it onto the top part of the bracket and you are all set. That piece is for rear brake cooling as well as a bit of aero. The duct does block much of that air so extending those veins with a bit of extra plastic might help with the brake cooling if the ducts were added.
If you look at the TPC video you will find that the CS does not have those vanes in the rear. Maybe PAG has decided that axle/bearing cooling was more important that rotor cooling. We already know that brake bias on the OEM is roughly 2 front pads to 1 rear; implying less cooling is needed. We also know that the CS has adjustability so ..... I think the minimal reduction in flow on the OEM is in the weeds. One could also argue the opposite that PAG has decided axle/bearing cooling on the OEM is less important considering how many actually will be tracked compared to C&C.
If you look at the TPC video you will find that the CS does not have those vanes in the rear. Maybe PAG has decided that axle/bearing cooling was more important that rotor cooling. We already know that brake bias on the OEM is roughly 2 front pads to 1 rear; implying less cooling is needed. We also know that the CS has adjustability so ..... I think the minimal reduction in flow on the OEM is in the weeds. One could also argue the opposite that PAG has decided axle/bearing cooling on the OEM is less important considering how many actually will be tracked compared to C&C.
CS braking system is entirely different than what is on the street car. Something to consider.
Agreed. Plus the CS sits lower than the OEM and therefore has different aero management as well.
Can you clear up any concerns with data by combining both parts for those interested?
we haven’t altered any factory components to affect anything and just simply added extra cooling for the outer axles as we see about 70% of those fail on 981, 718, 991 and 992 tracked cars.
we have had them on our car for about a year now and it all feels rock solid and lap times are keep dropping.
we haven’t altered any factory components to affect anything and just simply added extra cooling for the outer axles as we see about 70% of those fail on 981, 718, 991 and 992 tracked cars.
we have had them on our car for about a year now and it all feels rock solid and lap times are keep dropping.
Alterations performed as shown by your pictures include removal of the top portion of the vanes, item 19, and then affixed to the duct bracket on one end while relying on the stiffness of the bottom part, item 20. Anything else?
With stiffer front springs to keep the nose from diving and more brake bite in the back, my brake wear is only about 1mm behind in the rear with Ferodo DS312s. The back wheels are pretty hot when I come off the track. I am very late and hard on the brakes trailing deep into most corners. This is where I make up time on most everyone at my track. So I am concerned about brake heat and not losing any cooling back there.
This part looks like it will put more air over the outer bearing and the whole rear upright area. All of this is attached to the rotors, so everything will be cooler. Nothing in the OEM setup is lifting any air up into the inside of the wheel barrel. With the duct cool air is shot into the the inside of the wheel barrel, and then where is it going to go? Hopefully out of the wheel spokes as it passes by the rotors to cool them a little bit.
07-06-2024, 02:52 PM
