Anyone running Cross-drilled & Slotted Rotors...
Member
Joined: Mar 2010
Posts: 103
Likes: 1
From: Phoenix, AZ
Year: 96
Model: Cherokee
Engine: 2.5l I-4
The problem is at the edges of the little bores. When you break hard and the rotor heats up, these edges cool down faster than the solid area and create stress thru shrinking when cooling more than the solid part. That's what makes these things crack. On slotted ones, yes, they dissipate water and gasses better, and wear on your pads faster. But for off-roading, they'd be less than optimal. The best upgrade for our application is a larger dia solid rotor and maybe dual- or triple piston caliper. But, I seriously doubt, anyone would like that kind of stopping power on a Jeep, if so, you'd have to go all the way and put slicks or Hoosiers on it and Porterfield pads...
Thread Starter
Member
Joined: Oct 2008
Posts: 115
Likes: 3
From: Baltimore, MD
Year: 2001
Model: Cherokee
Engine: 4.0L 242ci 6cyl
OK, so I've been sold on sticking with stock Advance Auto, AutoZone, or Pep-boys rotors, as someone said earlier.."use the money on making it taller", which is next..a RE 3.5 or 4.5 lift.
Now pads: Semi-metallic, Ceramic, Kevlar, Organic, what is the consensus on them?
BTW, thanks guys for all the input/advice...
Now pads: Semi-metallic, Ceramic, Kevlar, Organic, what is the consensus on them?
BTW, thanks guys for all the input/advice...
For a vehicle like the XJ cross drilled and slotted or even just slotted rotors are a waste of money!
they are designed to dissipate heat fast under extreme braking.. and its not true about them cracking that just hear say ive been running numerous cross drilled and slotted rotors on my evo for 3 years with race compound pads running SCCA events or just beating it up on backroads.... and ive never had a problem.. but as i was saying its completely unnecessary for an XJ you will never brake that much and that hard in a car like this to actually get any use out of them it will be pure show on an XJ and u cant even see the rotors...... pointless.... just get a regular rotor and spend your money on something more useful!
they are designed to dissipate heat fast under extreme braking.. and its not true about them cracking that just hear say ive been running numerous cross drilled and slotted rotors on my evo for 3 years with race compound pads running SCCA events or just beating it up on backroads.... and ive never had a problem.. but as i was saying its completely unnecessary for an XJ you will never brake that much and that hard in a car like this to actually get any use out of them it will be pure show on an XJ and u cant even see the rotors...... pointless.... just get a regular rotor and spend your money on something more useful!
Thread Starter
Member
Joined: Oct 2008
Posts: 115
Likes: 3
From: Baltimore, MD
Year: 2001
Model: Cherokee
Engine: 4.0L 242ci 6cyl
if no one said they use them, that means that there's a reason. unless you're driving on 35's at 100 mph and deer keeps popping in front of you, there's no reason to stop on a dime. however, if that's the case, get a 50 cal. mount with digital "identify and destroy" setup.
it will save you brakes.
i myself use stock rotors with vented pads. works wonders for me.
it will save you brakes.i myself use stock rotors with vented pads. works wonders for me.
For a vehicle like the XJ cross drilled and slotted or even just slotted rotors are a waste of money!
they are designed to dissipate heat fast under extreme braking.. and its not true about them cracking that just hear say ive been running numerous cross drilled and slotted rotors on my evo for 3 years with race compound pads running SCCA events or just beating it up on backroads.... and ive never had a problem.. but as i was saying its completely unnecessary for an XJ you will never brake that much and that hard in a car like this to actually get any use out of them it will be pure show on an XJ and u cant even see the rotors...... pointless.... just get a regular rotor and spend your money on something more useful!
they are designed to dissipate heat fast under extreme braking.. and its not true about them cracking that just hear say ive been running numerous cross drilled and slotted rotors on my evo for 3 years with race compound pads running SCCA events or just beating it up on backroads.... and ive never had a problem.. but as i was saying its completely unnecessary for an XJ you will never brake that much and that hard in a car like this to actually get any use out of them it will be pure show on an XJ and u cant even see the rotors...... pointless.... just get a regular rotor and spend your money on something more useful!
CF Veteran
Joined: Apr 2009
Posts: 1,109
Likes: 3
From: Austin, Texas
Year: 1991
Engine: 4.0 I-6 H.O.
I'm curious to know who's running a daily driver with cross-drilled & slotted rotors like these from Summit:
http://www.summitracing.com/parts/SUM-DSEP-5115L/
along with ceramic pads like these, also from Summit:
http://www.summitracing.com/parts/HWK-HB210Z-677/
What are your opinions on performance, stopping distance, and overall improvements compared with stock.
I'm pulling the trigger on new cross-drilled & slotted, or just slotted rotors along with Hawk Performance Ceramic pads either way.
I just want a first hand opinion form guys here who have "actually" used or are using them now, and not an opinion from a googled web page, I've read enough of them.
If you are running either rotor above what kind is it and where did you purchase them.
~Thanks
http://www.summitracing.com/parts/SUM-DSEP-5115L/
along with ceramic pads like these, also from Summit:
http://www.summitracing.com/parts/HWK-HB210Z-677/
What are your opinions on performance, stopping distance, and overall improvements compared with stock.
I'm pulling the trigger on new cross-drilled & slotted, or just slotted rotors along with Hawk Performance Ceramic pads either way.
I just want a first hand opinion form guys here who have "actually" used or are using them now, and not an opinion from a googled web page, I've read enough of them.
If you are running either rotor above what kind is it and where did you purchase them.
~Thanks
unless you race your jeep in some sort of road race you will not see any benefits
see this thread
https://www.cherokeeforum.com/f2/wha...k-these-39531/
Senior Member
Joined: Jan 2010
Posts: 686
Likes: 0
From: Lake Orion, MI
Year: 2008
Model: Grand Cherokee
Engine: 3.0L CRD
OK, so I've been sold on sticking with stock Advance Auto, AutoZone, or Pep-boys rotors, as someone said earlier.."use the money on making it taller", which is next..a RE 3.5 or 4.5 lift.
Now pads: Semi-metallic, Ceramic, Kevlar, Organic, what is the consensus on them?
BTW, thanks guys for all the input/advice...
Now pads: Semi-metallic, Ceramic, Kevlar, Organic, what is the consensus on them?
BTW, thanks guys for all the input/advice...
Junior Member
Joined: Dec 2009
Posts: 80
Likes: 0
From: Herriman, Utah
Year: 1996
Model: Cherokee
Engine: 4.0
OK, so I've been sold on sticking with stock Advance Auto, AutoZone, or Pep-boys rotors, as someone said earlier.."use the money on making it taller", which is next..a RE 3.5 or 4.5 lift.
Now pads: Semi-metallic, Ceramic, Kevlar, Organic, what is the consensus on them?
BTW, thanks guys for all the input/advice...
Now pads: Semi-metallic, Ceramic, Kevlar, Organic, what is the consensus on them?
BTW, thanks guys for all the input/advice...
Senior Member
Joined: Sep 2008
Posts: 680
Likes: 2
From: Phoenix AZ
Year: 1997
Model: Cherokee
Engine: I6ho
For a vehicle like the XJ cross drilled and slotted or even just slotted rotors are a waste of money!
they are designed to dissipate heat fast under extreme braking.. and its not true about them cracking that just hear say ive been running numerous cross drilled and slotted rotors on my evo for 3 years with race compound pads running SCCA events or just beating it up on backroads.... and ive never had a problem.. but as i was saying its completely unnecessary for an XJ you will never brake that much and that hard in a car like this to actually get any use out of them it will be pure show on an XJ and u cant even see the rotors...... pointless.... just get a regular rotor and spend your money on something more useful!
they are designed to dissipate heat fast under extreme braking.. and its not true about them cracking that just hear say ive been running numerous cross drilled and slotted rotors on my evo for 3 years with race compound pads running SCCA events or just beating it up on backroads.... and ive never had a problem.. but as i was saying its completely unnecessary for an XJ you will never brake that much and that hard in a car like this to actually get any use out of them it will be pure show on an XJ and u cant even see the rotors...... pointless.... just get a regular rotor and spend your money on something more useful!
Also, husteling thru waskhes, service roads will fade the brakes to uselessness...
Any one that says that better brakes are a waste of money needs a reality check.
Senior Member
Joined: Jan 2010
Posts: 686
Likes: 0
From: Lake Orion, MI
Year: 2008
Model: Grand Cherokee
Engine: 3.0L CRD
Well, stopping from 80mph to 0mph heats and fades the heck out of mine... the truck actually starts stopping worse towards the end of the ordeal and I have to start grabbing lower gears to help brake.
Also, husteling thru waskhes, service roads will fade the brakes to uselessness...
Any one that says that better brakes are a waste of money needs a reality check.
Also, husteling thru waskhes, service roads will fade the brakes to uselessness...
Any one that says that better brakes are a waste of money needs a reality check.
and 80mph? didn't think there were speed limits that high anywhere in the country. unless you are ducking out from the po-po...
lol
Junior Member
Joined: Dec 2009
Posts: 80
Likes: 0
From: Herriman, Utah
Year: 1996
Model: Cherokee
Engine: 4.0
Well, stopping from 80mph to 0mph heats and fades the heck out of mine... the truck actually starts stopping worse towards the end of the ordeal and I have to start grabbing lower gears to help brake.
Also, husteling thru waskhes, service roads will fade the brakes to uselessness...
Any one that says that better brakes are a waste of money needs a reality check.
Also, husteling thru waskhes, service roads will fade the brakes to uselessness...
Any one that says that better brakes are a waste of money needs a reality check.
Yes I have run them, BUT in my Trans Am for SCCA competition
unless you race your jeep in some sort of road race you will not see any benefits
see this thread
https://www.cherokeeforum.com/f2/wha...k-these-39531/
unless you race your jeep in some sort of road race you will not see any benefits
see this thread
https://www.cherokeeforum.com/f2/wha...k-these-39531/
CF Veteran
Joined: Apr 2009
Posts: 1,109
Likes: 3
From: Austin, Texas
Year: 1991
Engine: 4.0 I-6 H.O.
Senior Member
Joined: Jan 2010
Posts: 686
Likes: 0
From: Lake Orion, MI
Year: 2008
Model: Grand Cherokee
Engine: 3.0L CRD


