Suspension & Brakes Springs | Shocks | Handling | Rotors

dimpled vs. cross-drilled rotors?

Thread Tools
 
Search this Thread
 
Old 07-26-2005, 12:34 PM
  #81  
TECH Fanatic
 
pimpmaro's Avatar
 
Join Date: Feb 2003
Location: Columbus, OH
Posts: 1,586
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Judd
I really recommend the ducting, cheap, easily reversible and no drawbacks on the street.
What about when it rains and the duct throws a nice cool splash of rain water on hot brakes?
Old 07-26-2005, 03:04 PM
  #82  
TECH Apprentice
iTrader: (7)
 
nytmare1's Avatar
 
Join Date: Sep 2004
Location: Fredericksburg, VA
Posts: 342
Likes: 0
Received 1 Like on 1 Post

Default

Originally Posted by pimpmaro
What about when it rains and the duct throws a nice cool splash of rain water on hot brakes?
I wouldn't think that would be a problem considering the brakes are exposed to the elements already. Plus, considering the hose is ribbed... I'd have to think that any rain deflected into the hose would most likely not make it all the way up. Now, it may be different if you drove into a huge puddle, but I still don't think it would have any ill effect on the rotors.

Marc
Old 07-26-2005, 06:06 PM
  #83  
Staging Lane
 
PrototypE's Avatar
 
Join Date: Apr 2004
Location: Last seen: lurking
Posts: 62
Likes: 0
Received 0 Likes on 0 Posts
Default

I would think there would have to be a LOT of water moving through that tube very quickly for that to be an issue.
Old 07-26-2005, 06:10 PM
  #84  
TECH Fanatic
 
pimpmaro's Avatar
 
Join Date: Feb 2003
Location: Columbus, OH
Posts: 1,586
Likes: 0
Received 0 Likes on 0 Posts
Default

Well, my concern is that ducts are designed to concentrate airflow (a fluid) and in the event of splashes or puddles, it would concentrate the water and dump it on the rotor instead of the ambient splashes it's accustomed to. It was just a concern of mine.
Old 07-26-2005, 06:13 PM
  #85  
Staging Lane
 
PrototypE's Avatar
 
Join Date: Apr 2004
Location: Last seen: lurking
Posts: 62
Likes: 0
Received 0 Likes on 0 Posts
Default

Let's see some pics of your new ductwork setup, Judd!

Last edited by PrototypE; 07-26-2005 at 06:26 PM.
Old 07-26-2005, 09:07 PM
  #86  
TECH Senior Member
iTrader: (2)
 
JasonWW's Avatar
 
Join Date: Sep 2004
Location: Hou. TX.
Posts: 6,814
Likes: 0
Received 3 Likes on 3 Posts

Default

On my duct idea, I would be using the factory T/A air inlet below the front turn signals. It is higher and more forward than the duct inlets normally mounted under the car. I just can't see it scooping up a bunch of water.
Old 07-26-2005, 11:23 PM
  #87  
TECH Senior Member
iTrader: (18)
 
DONAIMIAN's Avatar
 
Join Date: Jun 2002
Location: NW Houston, TX
Posts: 10,036
Likes: 0
Received 0 Likes on 0 Posts

Default

If I was to do ducts, im just gona hack up my front bumper and quater panels and install NACA ducts, label it a race car and call it a day. (ive been toying a lot with the idea).
Old 07-27-2005, 01:03 AM
  #88  
TECH Fanatic
iTrader: (1)
 
Judd's Avatar
 
Join Date: Nov 2001
Location: Cumming Ga.
Posts: 1,231
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by PrototypE
Let's see some pics of your new ductwork setup, Judd!
You can check out the link to my CarDomain page but remember that I've changed the scoops and air dam since then and it looks a heck of alot better now. I will try to get some up to date pics on there soon. Right now I'm in the midst of fighting Murphy off. He has really whooped up on my butt lately, my Firebird busted an axle Sunday and the fuel pump went out in my wife's daily driven Mustang later that day.

As far as the question on water hitting hot rotors, I have something like 20K on the car with the ducting under there. Plenty of rainy days in those 20K miles too!
Old 07-27-2005, 07:38 AM
  #89  
TECH Senior Member
iTrader: (2)
 
JasonWW's Avatar
 
Join Date: Sep 2004
Location: Hou. TX.
Posts: 6,814
Likes: 0
Received 3 Likes on 3 Posts

Default

Originally Posted by stang killer
If I was to do ducts, im just gona hack up my front bumper and quarter panels and install NACA ducts, label it a race car and call it a day. (I've been toying a lot with the idea).
Sounds like you are describing Jon Aadland's brake ducts. LINK

There's no need for all that cutting of the body work and if you have cruise control the module is going to prevent you from running the duct tubing to the rotor on the drivers side. You would have to mount the duct tubing real low to get it around the tire and then it would probably get tore up in short order. Like in this pic:

It looks like it's hanging too low in my opinion.

Going through the frame rail looks like the hot ticket. It's super clean and you can't even tell the car has ducts until you take one of the wheels off.
See how clean and tidy this duct design looks? And no rubbing when you turn the wheel.


Now, of course, you don't need to run 2 ducts, just one to the rotor hat will do the job.
Old 07-27-2005, 03:01 PM
  #90  
TECH Senior Member
iTrader: (18)
 
DONAIMIAN's Avatar
 
Join Date: Jun 2002
Location: NW Houston, TX
Posts: 10,036
Likes: 0
Received 0 Likes on 0 Posts

Default

I dont have cruise control anyways, and it would prolly be through the frame also. I thought about using the opening under the turn signal, but I didnt think it would pull enough air. With the way the bumper is designed on the pontiacs, I could see the fog light opening being the best bet. With the shape of the bumper I could see the air passing right over the holes on the sides.
Old 07-27-2005, 08:33 PM
  #91  
Staging Lane
 
PrototypE's Avatar
 
Join Date: Apr 2004
Location: Last seen: lurking
Posts: 62
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by stang killer
I thought about using the opening under the turn signal, but I didnt think it would pull enough air. With the way the bumper is designed on the pontiacs, I could see the fog light opening being the best bet. With the shape of the bumper I could see the air passing right over the holes on the sides.

Indeed, my thoughts exactly Stang Killer. You don't have cruise control? Did you remove it? I don't think I've ever seen a T/A without cruise.

Judd, I did check out your older setup, but I'm sure everyone wants to see pic's of your NEW setup!

Bummer about your axle, dude. Hmmm.
Can't expect too much of an s-10 ten bolt, I hear.
Old 07-27-2005, 09:04 PM
  #92  
TECH Senior Member
iTrader: (2)
 
JasonWW's Avatar
 
Join Date: Sep 2004
Location: Hou. TX.
Posts: 6,814
Likes: 0
Received 3 Likes on 3 Posts

Default

Originally Posted by stang killer
I dont have cruise control anyways, and it would prolly be through the frame also. I thought about using the opening under the turn signal, but I didnt think it would pull enough air. With the way the bumper is designed on the pontiacs, I could see the fog light opening being the best bet. With the shape of the bumper I could see the air passing right over the holes on the sides.
I think the air would get sucked into the hole just fine, but the opening is only about 20% larger than the cross section of 3" hose, so that's a bit smaller than the underbody scoops a lot of guys use. You could use the turn signal opening and mount a new light into the smaller hole beneath it.

You could use the fog light holes also, but you would have to take the front end off to modify the metal bumper. You'd need to drill 2 large holes in it and seal off the back side and ends. Then all the air going into the bumber will be forced into the frame rails. It's a lot more work, but if you still have the foglights, they will block most of the air.
Old 07-27-2005, 09:19 PM
  #93  
TECH Senior Member
iTrader: (2)
 
JasonWW's Avatar
 
Join Date: Sep 2004
Location: Hou. TX.
Posts: 6,814
Likes: 0
Received 3 Likes on 3 Posts

Default

Here is a pic comparing the sizes. Now the small lower hole is a bit larger than 3" tubing so you can see that the hole above is is quite a bit larger and the fog light hole is WAY larger.
Name:  frontholesizes.jpg
Views: 468
Size:  36.4 KB

I'm sure the fog light hole would force the most air to the rotor, but I think the smaller hole would still get the job done (considering almost no air is getting to the rotor right now) and with a grill would look totally stealth.
Old 07-31-2005, 03:19 PM
  #94  
TECH Senior Member
iTrader: (2)
 
JasonWW's Avatar
 
Join Date: Sep 2004
Location: Hou. TX.
Posts: 6,814
Likes: 0
Received 3 Likes on 3 Posts

Default

I mentioned I cracked my RotorPros with the heavy bedding session of the Carbotech Panther Pluses. I got 3 cracks in the outer half of each front rotor. Here are the pics.
Name:  CrackedRotor1.jpg
Views: 1855
Size:  119.7 KB
Name:  RotorCrack1.jpg
Views: 655
Size:  128.5 KB
Name:  RotorCrack2.jpg
Views: 489
Size:  47.6 KB
Old 07-31-2005, 10:28 PM
  #95  
TECH Fanatic
iTrader: (1)
 
Foxxtron's Avatar
 
Join Date: Sep 2002
Location: Brisbane, QLD, AUS
Posts: 1,747
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by Bad30th
Someone please tell me why the most expensive and best brakes I can buy for my car (Baer or Wilwood) are drilled and/or slotted.

Marketing ? I doubt it. If a solid rotor was better they would be solid. Why are there no $2000 aftermarket solid brake rotors ?

FWIW, I never noticed any difference between new stock brake rotors/pads and new blingy stuff.

Bad30th
I may be a little late spotting this thread, however if you've ever seen a silver '99 Z28 around north county, then you've seen a $2000 plus brake system that has floating blank rotors (no cross-drills, no slots, no dimples, etc.). It is also a brand that has been used for a majority of vehicles in different sanctioning bodies (including Speed World Challenge).

Stoptech allows you to get blank friction rings. Their sales staff even admit that those features are mostly looks, with the exception that slots have an ability to constantly wipe the face of your pads, thus shortening their life.

The only pads that require drilled rotors would be Pagid, since they warn that they severely outgas for most of their pad life, but why spend the money on them, since their performance hasn't been proven to last longer than ones that don't.
Old 12-03-2005, 12:49 AM
  #96  
12 Second Club
iTrader: (18)
 
steveo346's Avatar
 
Join Date: May 2005
Location: San Antonio,Tx
Posts: 2,124
Likes: 0
Received 1 Like on 1 Post

Default

well i recently warped the **** outta my front rotors so im gonna end up buying some cheap and decent cross drilled rotors from pepboys....i think their called stoptech im not sure but their $48 bucks each...and they can also get me the hawk hps pads
Old 12-03-2005, 01:02 AM
  #97  
TECH Fanatic
iTrader: (1)
 
Foxxtron's Avatar
 
Join Date: Sep 2002
Location: Brisbane, QLD, AUS
Posts: 1,747
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by steveo346
well i recently warped the **** outta my front rotors so im gonna end up buying some cheap and decent cross drilled rotors from pepboys....i think their called stoptech im not sure but their $48 bucks each...and they can also get me the hawk hps pads
I doubt they're stoptech's rotors for that cheap, since StopTech sells their blanks through their own website and/or company. You're probably talking about ProStop rotors.

Their description of their EBC rotors are simply a joke. If you'd like to not only warp, but also crack your rotors, definitely go for the cross drilled, slotted, dimpled, and other useless rotor face patterns because those rotor face patterns definitely weaken the rotors srtucture and cause stress risers, not to mention the rotor face patterns cause premature and uneven pad wear.

Read the Brake FAQ sticky for more details.
Old 12-04-2005, 12:51 AM
  #98  
Copy & Paste Moderator
 
VIP1's Avatar
 
Join Date: Apr 2002
Location: Eastern MA
Posts: 9,716
Likes: 0
Received 187 Likes on 141 Posts

Default

Originally Posted by Foxxton
Read the Brake FAQ sticky for more details.
....Or actually read the thread to which he/she replied.



Quick Reply: dimpled vs. cross-drilled rotors?



All times are GMT -5. The time now is 01:49 AM.