I was thinking (and I don't know if I'm thinking correctly) that with most of my direct radiator airflow now blocked off by oil/trans coolers, I should go ahead and have UpRev turn on the fans full blast at all MPH settings (but still ramp up with water temp initially), just to provide some "pull" to get through the layers of radiators and help flow move in the right direction instead of deflecting off to the sides.

Yes AutoX. I was running the first half of the day staged and waiting. The second part on the flip course was pretty much back to back runs for about an hour and some change. Its a really good way to get to learn the car and learn how to control it I think. I will say this, even though I didnt really see fuel starvation... If you spin the car completely around it will stall and be a little hard to start for a few seconds. lol

Say it with me!

Clutch in on a spin! Clutch in on a spin!

I like: "In a spin both feet in!"

Same, although I found a strange thing with my group that I go out with:

They never bothered to explain the REASONING behind "In a spin, feet in". If they had, I may have survived my wreck at VIR.

Does that mean that you're posting... from beyond the grave?

Correct.

Be spooked.

Sent from my Galaxy S3

Do those Carbotech pads make a lot noise and dust or are they ok for street use too?

They make a lot of noise and dust. No, they are not OK for street use, because they only work properly at temperature.

Ask bladesofchaos (he has special characters in his name, cant remember what they are) what happens when you use XP8's as your DD pads. When I took them off of his car, the material buildup was so aggressive, they dug what were probably 1/2" wide, and 1/8" DEEP grooves into his brake rotors and ruined them, simply because they werent getting hot enough to shed the pad material properly.

There ARE street-style Carbotechs. Just not the XP line...they are for the track, and track only.

thanks that's GTK! My Z is not a daily driver but most, if not all driving is on the street. I'm changing the front rotors out and was wondering if I should change the pads while I'm at it. If it's going to be dusty and noisy, I'll just keep the OEM pads and swap them out if I plan on a track day.

Just swap the pads out the night before your track day.... no reason to squeal all summer :tup:

Edit: i run XP8's all the way around. Perfect for summer tires.

I never had trouble streeting XP10/XP8s aside from dust/noise. They worked great even cold. I didn't drive the car a ton on the street though so that may be why I never had rotor problems. Swapping to Bobcats is where it's at though. :)

It's not necessarily recommended to run the same compound all around. Better to run a more aggressive compound up front. This will cause the front end to lock up before the rear end, preventing a mid-corner breaking spin. Just FYI..

Blades used his car as a DD, so...that could explain it.

New here, and just bought my Z, but I have a lot of track experience, and race spec miata also. Two things I would say are:

1. Try to never ever come to a complete stop with hot brakes. Slow down to a very slow speed, and try to let the car coast to a stop if safely possible. Then pop it in gear...this keeps pad material from transferring to rotors, which believe it or not, causes more "pulsating brakes" than actual warped rotors

2. I can't stress this enough...It's called a cool down lap for a reason! You should, if possible, NEVER use the brakes, or at most use them minimally. Doing that should tone down your driving on that lap, and give it time to cool down.

Fun thread to read, and great forum. You will see me more often now, as we are trying to get the car ready for 2015 One Lap of America.

Tracy

^ Very good stuff above, I do both religiously now.

For similar reasons, at the end of a session I always just drive in a small circle at low speeds for a few minutes in the parking lot (away from everyone else) to let my car cool a bit before turning it off and parking it (letting the car rest in gear, not brakes).

^ I do the same thing, for some reason I always go counterclockwise too so it's like 15-20mph nascar laps :driving:

Yea I'm always baffled by the cool down lap how many people come flying past me. I put it in fifth and cruise in.

I run XP12s front and rear. but, I have stoptech trophy brakes also, so that might make a difference. They perform splendidly, except when I run my 245 rain tire RE11a's. Then they tend to flat spot the tires unfortunately. :(

before I got phunk's fuel system fix, I would just drive off the track and to the gas station after every session and let them cool that way.


btw, with the akebono's, at the very first sign of any fade at all, immediately get off the brakes and back it way down and go to the pits. my first track day in the car 4 years ago and I got a tiny bit of fade and backed off/ by the time I got to the pits a half mile later, it took me 50 feet to stop from 10mph. When they do go, they go quickly with very little warning.

My goal during a cooldown/checker flag lap is to go as fast as possible without braking. More speed = more cooling. I'm usually at least one gear up from normal too though.

Yeah same here. I still speed up and slow down and follow a line, but I try to run at a pace where downshifting + engine braking can let me not touch the brakes. It's easier/faster/safer to cool off the engine in the paddock than brakes.

For experienced drivers, I think it's less a problem. You know how to diagnose handling issues :)

:tup:

I like this guy...

A cool down lap can help, but you don't really need if if you just park, turn off the car, and put the car in gear. Thus no pads are touching the rotor and the car can cool off.

This worked well for me during my sessions, running XP10s front and rear.

The pads are almost always at least partially touching the rotor, just not with any real force. Even if we assume that you manage to knock them away just right (slalom the car a bit before parking to try to induce pad knockback?) to get a tiny gap going on all 8 pads, it's still better to give the brakes a cool-down lap than to come in off a hot lap and park immediately.

The rotor will cool all the way down from hot-lap temps to ambient temps either way. The difference is that the more of the cooling that's done while rotating (cooldown lap) instead of fixed (parked), the more even the cooling is. While parked different areas of the rotor cool at different speeds thanks to the shapes and positions of the caliper, pad, wheel, suspension, etc which will absorb heat at different rates and/or block off ambient wind cooling. Having different parts of the rotor cooling at different rates is going to stress the rotor more than having it cool off evenly while spinning.

good info especially if you have blanks...

tried to teach the wife this for our 13 R/T which the rotors are warped already....

I have to say thank you all for putting all this information in one place. I have read through almost all of this thread and I have come up with the following items I still think I need.
Carbotech Brake Pads Sport Front - Pads XP10
$199.00
Carbotech Brake Pads Sport Rear - Pads XP10
$166.00
Motul RBF 600 Performance Brake Fluid 2 Qts
$34.50

I am going to try to make it out to NJ Motorsports Park a few times this year. It will be my first time a track, and I want to have a good safe track car.

My car is a 2011 Nismo with the Nismo pads but I don't want to test them on the track. I have already installed a 24 row oil cooler and soon will have installed the CJM Fuel starvation kit. The only other performance changes are Stillen G3 intake and Berk Test pipes. The rest of the car is OEM.

My one question is since I will be already draining all the brake fluid should I change out the brake lines to SS or is there really no benefit since the car isn't old and doesn't have many miles on it?

Im not an expert my friend but i think you have to put the SS lines if you can to track your car. Today i buy mines from Z1 with the Motul Brake fluid!!! because i want to put my car ready for a track day in March.

The SS lines are mostly for pedal feel/response. Less mush in the system than having the rubber expand against the pressure. They're not strictly necessary right off the bat.

When I cooked my fluid for the first time I changed the fluid and got some confidence back. But the SS lines I got full confidence back.

Just go Motul 660 not the 600, or even Endless fluid. You will cook the 600 easily with those pads. Mushy horrible brakes is something you will experience inevitably, but the less the better.

The SS brakelines are a quick cheap safety upgrade, first thing a lot of guys do. I would highly recommend it. If a $25.00 brake line is the difference between a rubber line exploding and a SS line not exploding, then it's a definite buy at $25.00.

Thanks guys!

FWIW, you need to be sure flush and bleed the system more often with 660. It is even more hydroscopic than 600 is. Once the water content gets above a very very low percentage, its boil point comes way way down.

Has anyone actually burst a brake line? I've never heard of it. I could see it if the lines were old and the rubber was dry and weak. But surely not a line in good shape on a well-maintained or relatively-new car?

I've never heard of anyone actually rupturing an OEM brakeline that wasn't a million years old. Could happen though I suppose.

Yup I flew off the track at pocono. I was less than 3 feet from the wall once I stopped, never been the same since

From a blown brake line? That's a serious Code Brown moment. :eek: