M Pars better than Turbines or Throwing Stars!!!!! Have you gone mad Steve?true david, your friends heat tolerance levels might be greater than yours resulting in your scientific testbeing inconclusie,,,,
as for the original question,,
if the turbines are that much better why did BMW change them? i got to admit they do look great but so do the throwing stars, not a patch on the M Pars!
now fuse is lit i will stand back
my turbines get very dirty with brake dust, especially the outer lip, so i'm not sure if that is a good way to gauge their cooling abilties.Actually now I am thinking that the T-Starts are absolute effective because after I clean the wheels along with my car. After a few day of driving my wheels are dirty black on the lip.
With turbine covers my wheels never gets black, because they import the air.
May be the benefit of using the is not to clean the wheels that ofter :hihi:
For now I will run 850Ci Brakes 325x30, Rear 300mm vented from E34 M5. Car is E24 M6 lighten to around 2700pounds. That is just 1000pounds lighter than standard stock E34 M5.One option might be slightly more effective than the other but lets be honest,
if you're after maximum braking performance you simply throw away the standard
set up and start somewhere else don't you ?
I love my car (and it's completely standard).
I don't track the car anymore but when I did I could quite easily reduce
the standard brakes to mush in three laps.
At no point did I ponder which wheel fan would improve the fade resistance,
I simply knew that I was driving a heavy, fast, road machine on a track.
Put the covers you really want on your car,
the ones you like best
If you want to improve the brakes overall, change the brakes !
raymondw on the E34 M5 mailinglist (message 22100) said:@Finn,
I hope you arrived not too early monday morning. almost 2k km on a single day.
Ouch. When I drove home yesterday evening, I was tired so I did not go over
180km/h. If any of us needs to improve the brakes, it is you. My laser
temperature meter has a range to 500 degrees Celcius, but this was not enough to
measure your front brake temp. Your rear brakes where around 140 degrees
Celcius. I should have measured your brake temps after your cooling down also.
Just a moment before, Stevie and I measured the brake disk temperature of the
Winckelhock E34 M5 that was driven privately by one of the fahrsicherheits
instructors. His temperature readings showd 400 degrees Celcius on front disks
and 100 degrees Celcius for the rear. This was measured only 30secs after he
came of the track. Although not a valid comparison, we can conclude that the
turbine rims provide for better cooling of the brakes.
Just for the record:
E34 M5 #1 (FRONT: 260, REAR 60) (Raymond's E34 M5 with throwing stars)
(Measured after cooling down)
E34 M5 #2 (FRONT: 320, REAR 100) (Serge's E34 M5 with throwing stars)
(Measured after cooling down)
E34 M5 #3 (FRONT: 400, REAR 100) (E34 M5 Winckelhock with turbines)
(Measured 30sec after it came of the track)
E34 M5 #4 (FRONT: >500, REAR 140) (Obviously Finn's E34 M5 with throwing
stars) (Measured 30sec after it came of the track)
Would need to look again closely at the cover but centre is like a rotating impellor that draws air in due to rotation. This then circulates around hub and brake before the rotation of the vanes in the disc sends the heated air outwards to be drawn out of the wheel at the outer edge... My assumption anyway.Bwahahahaha @ David. Really scientific. hehe
What I don’t understand is why the turbines suck air into the wheel well.
Isn’t the wheel arch/well a high pressure point at speed and therefore the high pressure generated at speed that tries to escape will fight/clash with the turbines trying to force air in???
frank fahey of fahey motorsports, a souther california bmw shop, felt the same way. Not sure if he had any data to prove it though.In that respect I think the System II covers are better in that they suck hot air out.
I think that the turbines would work better if they were reversed. Any comments on that??