I have a zip file for those who want to see all the associated damage that this bearing can cause email me at [email protected] I will send it to you
The new inner bearings have metal races instead of plastic(SKF/SuperPerformance). Mine were starting to get brittle, but still intact. I used HIL outer bearings, which are NTN. I believe these are custom made for HILL Engineering.. Image Unavailable, Please Login Image Unavailable, Please Login
if you own a 575 of a 550 you might want to start doing this a quick check of the under hood temps after a drive with an IR gun will surprise you how hot these cars get and even though have the SuperSprint system which relocated the cats under the car the temps are still high
How does your supersprint system sound compared to stock? I can’t find sound clips on YouTube for love nor money. Do they really improve performance all that much?
its the only way to go it removes the cats from the headers and gets a lot of the heat out of the engine compartment as for the sound not much the performance is there
I have been closely measuring my 575M underhood temperatures with a wireless ambient temperature thermometer. I have the stock cats and exhaust. The probe is located between the battery and the engine. As long as the car is moving temperatures are a sanguine 120-140 degrees. Temperatures climb when the car is stopped AND the engine is turned off. Temps reach 170 to 180 degrees with the hood closed. Opening the hood for just a few minutes, once parked, mitigates a good bit of the heat soak.
I would bet exactly the same (or worse) with the mid engine V8 cars. Many open their engine lids when parked. I don't Interestingly, my BMW M550ix has radiator grill shutters that are closed while driving at speed, but open in stop and go driving. When you shut down the engine, it opens the shutters and turns on the electric cooling fan for several minutes until the temperature drops to some set point. Then it turns off and shutters close.
I am sure it would be an obscene temperature on the headers, several hundred degrees. Even my four-cylinder Mazda race cars could generate those header temps an. It's all about ensuring and managing passive airflow. That would all reinforce that our V-12's can be ridden hard, but we can't put them away wet, to paraphrase an equestrienne saying. We should open the hood and allow a sensible cool down. I will take more temperature data...it appears the hood only needs to be open for a few minutes. Stay tuned.
If you share with me the thermometer model / type, I am happy to do similar on my Fabio 6:1 + Ceroke coated headers and see the numbers on my 575. (Apples to apples equipment even if not the same machine)
Cool idea. Here is the unit I have. I zip tied a short (4”) piece of fuel hose to the bracket of the battery. Then I insert the probe into it. The fuel hose is a nice diameter that holds it snuggly. Then I can monitor the temp on an app on my phone. ThermoMaven Smart Bluetooth... https://www.amazon.com/dp/B0DG5GKJKB?ref=ppx_pop_mob_ap_share
Yep, I open the hood/bonnet every time after I drive my 550. Have a wooden dowel rod that I use to prop it up to relieve some pressure on the struts. Plus, all that heat soak can't be good for all the 25 year-old various plastic parts inside the engine bay, like the fragile plastic shock adjusters that sit right next to the exhaust headers.
