AP Racing Big Brake Kit Installed!

Skeeterbop · 01-13-2011, 01:04 PM

Quote:

Originally Posted by Valentino

Congratulation on this marvels BBK. You got one of the best. if not the best.

I don't think cross-drilled are for looks. I think that cold air inter the vent in between the disk,and hot air exits the disk throe the holes. and i also think it's good for wet weather. their lighter too.

cross-drilled also have their down side. they crack.

I don't really want to turn this into a debate. but i searched and found this nice write up Cross Drilled VS Slotted Rotors

Valantino

Corect me if I'm wrong, but I could have sworn that the original purpose of the slotted and cross drilled rotors was originally to help with degassing. Back in the day when the pads would heat up the slots and holes would give the gas from the pads somewhere to escape which helped prevent a decrease in breaking performance. Also from what I've been reading, is that the slots still help keep pads clean, but the original reason of the slots and hole isn't really needed with pretty much any street pad any more and would generally be for looks more than anything else. Again I could be wrong and if so feel free to correct me. Also I'm assuming that since these fit the sport package equipped 370 it will also fit the NISMO model as well.

AP - Chris_B · 01-13-2011, 03:32 PM

Quote:

Originally Posted by Skeeterbop

Corect me if I'm wrong, but I could have sworn that the original purpose of the slotted and cross drilled rotors was originally to help with degassing. Back in the day when the pads would heat up the slots and holes would give the gas from the pads somewhere to escape which helped prevent a decrease in breaking performance. Also from what I've been reading, is that the slots still help keep pads clean, but the original reason of the slots and hole isn't really needed with pretty much any street pad any more and would generally be for looks more than anything else. Again I could be wrong and if so feel free to correct me. Also I'm assuming that since these fit the sport package equipped 370 it will also fit the NISMO model as well.

I am going to have to sit down soon and do a full, top/down write-up on this topic. In the meantime, I'll say that cross-drilling was developed initially a long time ago to reduce rotor weight. Benefits that were discovered were increased pad bite (more leading edges), better wet performance, (slightly) better cooling and elimination of pad off-gassing effects.

Pads today off-gas very little -- at least after their initial green bedding. But the other benefits remain. They are not ideal for racing or hard track use as the holes add stress risers, which can result in premature cracking. But for street and high-performance use, QUALITY drilled rotors usually perform great.

Looks? Well, that's up to you!

Vegitto-kun · 01-13-2011, 03:43 PM

Quote:

Originally Posted by AP - Chris_B

I am going to have to sit down soon and do a full, top/down write-up on this topic. In the meantime, I'll say that cross-drilling was developed initially a long time ago to reduce rotor weight. Benefits that were discovered were increased pad bite (more leading edges), better wet performance, (slightly) better cooling and elimination of pad off-gassing effects.

Pads today off-gas very little -- at least after their initial green bedding. But the other benefits remain. They are not ideal for racing or hard track use as the holes add stress risers, which can result in premature cracking. But for street and high-performance use, QUALITY drilled rotors usually perform great.

Looks? Well, that's up to you!

drillers rotors are bleh.

one full day of francorchamp spa tracking and our GT-R's rotors were cracking. so we went AP racing J-hooks.

and extremely pleased

AP - Chris_B · 01-13-2011, 05:01 PM

Quote:

Originally Posted by Vegitto-kun

drillers rotors are bleh.

one full day of francorchamp spa tracking and our GT-R's rotors were cracking. so we went AP racing J-hooks.

and extremely pleased

Glad you are enjoying them! The J-Hooks have been a big success for many GT-R owners.

Skeeterbop · 01-13-2011, 09:25 PM

Quote:

Originally Posted by AP - Chris_B

I am going to have to sit down soon and do a full, top/down write-up on this topic. In the meantime, I'll say that cross-drilling was developed initially a long time ago to reduce rotor weight. Benefits that were discovered were increased pad bite (more leading edges), better wet performance, (slightly) better cooling and elimination of pad off-gassing effects.

Pads today off-gas very little -- at least after their initial green bedding. But the other benefits remain. They are not ideal for racing or hard track use as the holes add stress risers, which can result in premature cracking. But for street and high-performance use, QUALITY drilled rotors usually perform great.

Looks? Well, that's up to you!

That would be awesome. I'm up for learning what ever I can

Vegitto-kun · 01-17-2011, 01:06 PM

AP racing on the dezir prototype?

the J-hooks on the GT-R

dirty as hell though

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01-17-2011, 01:06 PM	#6 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 263	AP racing on the dezir prototype? the J-hooks on the GT-R dirty as hell though