((think the idea was that the air flow resulting from linear car travel was so much higher than rotor induced airflow that it really didn't matter. That was confirmed by a rotor manufacturer... also I guess that in the s2000 no air is being re-directed through the hub to the internal rotor vents. >>

I don't know who confirmed this but I am absolutely shocked that this was the consensus. Surely there must have been comments such as my own? I'll have to look up the thread. Whoever told you that it didn't matter is wrong. Using curved vane rotors improperly will not help the car's braking action, IF (big IF) that is why you made such a mod. Luis this is very well established braking technology. I didn't realiize that you had this set up and hope that you don't take offense at my comments. I don't know how you use the car, if it's for casual use you basically just got ripped off and lied to by the uninfomed and incompetent. If you do or plan to do lots of track stuff then I'd ditch that setup. Also, curved vane discs tend to have longer vane section than straight vaned discs. This makes them heavier for otherwise the same construction. So your 7 ounce (if I recall corretly)weight difference may not be apples to apples.

<<But it still doesn't make sense to me. >>

Well it will sink in if you give it a chance. I have measured tons of discs to the ten thousandth of an inch. There are lots of books about this stuff and many websites out there.

<<Porsche is rice? Ferrari is rice? Lotus is rice? >>

Why in the world would you say this? Those companies have engineered their braking systems and don't do things like make their discs underweight by drilling. If they want holes they cast them in and/or upsize the disc so there is no problem. Get it?

<<I suppose you are right. From a hardcore racer perspective those statements are legitemat>>

My undergraduate degree is in Engineering. I don't like mods that don't work. Lots of folks put things on their car that don't work. That's okay. But don't claim it's better than stock or proven mods and expect no reaction. Had I seen the thread on the curved vane disc in time I would have tried to help. Just as I have tried with the splash shield thing.

Stan

 

Stan, thanks for the info. Have you written any books? I can see from your postings that you have a deep understanding of automobile concepts. Also, when are you buying your S2000

 

[QUOTE]Originally posted by E30M3:
[B]((think the idea was that the air flow resulting from linear car travel was so much higher than rotor induced airflow that it really didn't matter. That was confirmed by a rotor manufacturer... also I guess that in the s2000 no air is being re-directed through the hub to the internal rotor vents. >>

I don't know who confirmed this but I am absolutely shocked that this was the consensus.

 

With all due respect, I will be dropping out of this thread.

Stan

 

The discussion was between myself and Luis (or was it Pepe, whoever got the Spoon rotors). I believed the directional vanes would have an effect, he didn't.

I posed this question to Mark Joseph (MD of Disc Brakes Australia, and this was his response:
The main reason for the curved vents is for strength, and to help eliminate
brake squeal.

Many rotors crack radially, (in a straight line from centre to outer
diameter). The curved vent helps eliminate this cracking, and also dampen
any brake squeal from disc pads.
The only time directional vents help in cooling is on high performance
vehicles travelling 200 plus km's. Eg Super V'8s, Indy car etc.

DBA's Longlife Gold drilled slotted rotors have non-directional vanes.

 

Hey Wayne, do you know if you can get them in red?