|
|
05-09-2009, 02:43 PM | #45 |
Major General
374
Rep 8,033
Posts |
Nice pics! Too bad you don't have any steaming ones though.
__________________
|
Appreciate
0
|
05-09-2009, 06:33 PM | #46 |
Captain
30
Rep 915
Posts |
lucid - another thread memtioned problems with power steering fluid overheating with the Performance Center M3s. Have you noticed any of this?
BTW, I tracked my E92 at CMP this week, only 6 laps just to get the feel of the car. Only ran about 80 percent. No issues, and the car handled very good, stock everything. Thanks, vz
__________________
Previous Track Toy |
Appreciate
0
|
05-09-2009, 06:37 PM | #47 |
Major General
374
Rep 8,033
Posts |
Strangely enough, not an issue at the Glen, but this was a consistent issue at NHIS last year, which is a much slower, but tighter and technical track. I don't have a good handle on what contributes to the overheating of the PS fluid. I don't know where the energy input into the system is exactly. Does it have to do with the steering input and how hard the pump works? And maybe on a faster track, there is more airflow into the engine bay and hence more cooling for that system?
__________________
|
Appreciate
0
|
05-15-2009, 10:13 PM | #48 | |
NASA/PDA Instructor
21
Rep 284
Posts |
Quote:
Tight tracks just don't allow a PS system to shed it's heat fast enough..larger coolers are usually the ticket, if synth-fluid is already used. First... Great job at the Glen!!! My favorite track of all and surely an M3 track. The brakes... Using r-comps with the stock brake system, even with pads/fluid/lines, is not going to cut it. Come to think of it...no car I've ever driven on r-comps allowed one to run without ducting. You NEED ducting...anything...even scoops that throw air at the rotors from under the car, like the 996turbo. I plan on running two 2" hoses to each wheel-well...I"ll try to mount them close to the center of the backing-plates but there's not much room in there. Figure I'll mount them 'just for the day' and then take them off. The requirements of cooling brakes, especially at the Glen, are huge. Taking a car as heavy as the M3 and braking down from the speeds possible at WGI REQUIRES ducting...especially on r-comps. I'll not be running r-comps on this car, as I'd need to throw waaaay too much cash at it once that starts...just gonna buy a SpecE30 or build an E36M for next season. One could also try...I'd have no idea where they'd fit...the brake cooling fans that are used when there is precious little ground clearance and they suck air from under the car... http://www.tjtrailers.com/store/detm...-blower-3.html I'll see how the 2x2"hose works first, though,... Be good, TomK
__________________
"Arcadian, I've fought countless times, yet I've never met an adversary who could offer me what we Spartans call "A Beautiful Death." I can only hope, with all the world's warriors gathered against us, there might be one down there who's up to the task."Μολὼν λαβέ!! |
|
Appreciate
0
|
05-16-2009, 01:52 AM | #49 | |
Captain
80
Rep 961
Posts |
Quote:
The PS fluid doesn't "boil" or "overheat". It just expands as it gets hot and when all the air is pushed out of the reservoir then some fluid leaks out. It's that simple. One thing that does seem to make the fluid hotter is bypassing it under pressure, which is how the less boosted "sport mode" steering is achieved in MDM. I run mine as standard power steering boost - the wheel's lighter but the fluid's cooler. |
|
Appreciate
0
|
05-16-2009, 09:38 AM | #51 |
Major General
812
Rep 7,888
Posts |
|
Appreciate
0
|
05-16-2009, 01:02 PM | #52 | |
Captain
80
Rep 961
Posts |
Quote:
That's the Brabham wheel from the BT92. This is a front wheel and "front" is to the right. The curved CF blades will pull air out of the wheel well. |
|
Appreciate
0
|
05-16-2009, 01:07 PM | #53 |
Major General
374
Rep 8,033
Posts |
I didn't realize those are functional. Are they?
__________________
|
Appreciate
0
|
05-16-2009, 01:37 PM | #54 | |
Major General
812
Rep 7,888
Posts |
Quote:
I do not think the ones on The Brabham would flow as much air. |
|
Appreciate
0
|
05-16-2009, 01:39 PM | #55 |
Captain
80
Rep 961
Posts |
Well, they're going to do something, that's for sure.
As far as the air over the road is concerned, the bottom of the wheel is at a standstill and the top is moving at twice the speed of the car. I'd think that a curved blade like that moving at 200mph or 300mph would definitely pull air out of the wheel well. If you look at a picture of the front of a BT92, the air dam that the factory put in remains unchanged, even though the bumper wrapper is different. If Brabham didn't mess with the under-car airflow, they must have thought that BMW did a good job. It's clear that the Brabham engineers did spend a lot of time dealing with aerodynamics - looking at the rear, they changed the exhaust routing to the middle and put a flat panel ahead of the new rear diffuser to cover the hole left behind when the factory mufflers came out. How's that CFD project coming along? |
Appreciate
0
|
05-16-2009, 01:40 PM | #56 |
Major General
812
Rep 7,888
Posts |
|
Appreciate
0
|
05-16-2009, 02:30 PM | #57 | |
Major General
374
Rep 8,033
Posts |
Quote:
__________________
|
|
Appreciate
0
|
05-16-2009, 02:42 PM | #58 |
Major General
374
Rep 8,033
Posts |
It will go somewhere when I stop driving the car so much.
My friend is waiting for me to obtain some accurate 3-D representations...
__________________
|
Appreciate
0
|
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|