Do you need to bleed brakes after a HPDE
05-23-16, 11:10 PM
#1
Driver
Thread Starter
Do you need to bleed brakes after a HPDE
Well I have just completed 2 track days and going on my 3rd this Wed. I am running Motul 600 with Project Mu HC+800 pads on stock rotor. I never experienced any fades whatsoever. Also will 500ml be enough? I am not sure when I should change out brake fluid. Any suggestions?
Last edited by AshyAnklez; 05-23-16 at 11:46 PM.
05-24-16, 06:17 AM
#4
Pole Position
I would bleed just enough to get and air/degraded fluid out of the system. Check for bubbles , once you stop seeing them, move to the next caliper. I usually do this before each day at the track. For example, On race weekends or 2-day track events I bleed at the start of each day. This could take way less than a full bottle and could take more if something really went wrong. Most of the air/degraded fluid in the system is contained to the caliper and the lines close to it. The other lines generally have original spec fluid since the system doesn't really cycle and they are not experiencing extreme heat to boil the fluid. So each time you bleed the brakes your just moving good fluid through the system. I guess you will be out there with Zach, awesome man! Wish I could make it this time, I'm shooting for June/July though, most likely July, you think you might come out to that event?
05-24-16, 06:45 AM
#5
Forum Administrator
iTrader: (2)
My local 15 year-experienced HPDE instructor/ racer's (wife) answer is...
Do you have to? No.
If you want to be super safe, do it both before and after.
Before because during typical street activity moisture and air have worked their way into the system and will compromise the edge of braking performance
After because likely you've overheated your braking system beyond it's normal operating range with a car as heavy as the IS-F and pedal won't be as firm on the street as it could be.
Do you have to? No.
If you want to be super safe, do it both before and after.
Before because during typical street activity moisture and air have worked their way into the system and will compromise the edge of braking performance
After because likely you've overheated your braking system beyond it's normal operating range with a car as heavy as the IS-F and pedal won't be as firm on the street as it could be.
05-24-16, 03:19 PM
#6
Driver
Thread Starter
05-24-16, 03:24 PM
#7
Driver
Thread Starter
I would bleed just enough to get and air/degraded fluid out of the system. Check for bubbles , once you stop seeing them, move to the next caliper. I usually do this before each day at the track. For example, On race weekends or 2-day track events I bleed at the start of each day. This could take way less than a full bottle and could take more if something really went wrong. Most of the air/degraded fluid in the system is contained to the caliper and the lines close to it. The other lines generally have original spec fluid since the system doesn't really cycle and they are not experiencing extreme heat to boil the fluid. So each time you bleed the brakes your just moving good fluid through the system. I guess you will be out there with Zach, awesome man! Wish I could make it this time, I'm shooting for June/July though, most likely July, you think you might come out to that event?
I got to ride with Zach the last time we were at AMP in April. I will try to make July.
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05-24-16, 03:32 PM
#8
Driver
Thread Starter
My local 15 year-experienced HPDE instructor/ racer's (wife) answer is...
Do you have to? No.
If you want to be super safe, do it both before and after.
Before because during typical street activity moisture and air have worked their way into the system and will compromise the edge of braking performance
After because likely you've overheated your braking system beyond it's normal operating range with a car as heavy as the IS-F and pedal won't be as firm on the street as it could be.
Do you have to? No.
If you want to be super safe, do it both before and after.
Before because during typical street activity moisture and air have worked their way into the system and will compromise the edge of braking performance
After because likely you've overheated your braking system beyond it's normal operating range with a car as heavy as the IS-F and pedal won't be as firm on the street as it could be.
Whats the point of upgrading to Motul 600 if I have to keep changing out fluid before and after?
05-24-16, 03:58 PM
#9
Forum Administrator
iTrader: (2)
My wife is a real "change it before it becomes a problem" type person when it comes to track stuff so take that into account with her answer. She uses the Castrol SRF fluid which is $60+ a qt, but her track car isn't street legal so it's typically only a bleed 'before' for her.
05-24-16, 05:15 PM
#10
I use the Motiv speed bleeder. The calipers on the ISF were designed with easy access in mind. Bleeding brakes and changing pads is really, really simple. Going on track costs a lot of time and money. If you aren't willing to commit both, stay at home for everyone else's safety, lest you turn your ISF into a 4000lb missile you can't stop.
05-24-16, 06:21 PM
#11
Pole Position
You get the higher boiling point. Like I said, you don't need to change it out, just need to do a slight bleed to get the air and fluid out of the caliper, it usually is barely enough to fill the bleeder bottle. If you have dough to go through a whole bottle, go ahead. I don't do it.
05-24-16, 06:43 PM
#13
Pole Position