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Old 06-01-2012, 03:40 PM
  #16  
NJ-GT
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Originally Posted by mdrums
I've been using Pro Speed RBF 683 and have not boiled it. Indy, NASCAR lots of ALMS and Rolex teams have switch over to this fluid.

I found SRF to feel more mushy all the time and sometimes I had thought I boiled it but really didn't. Pro Speed have less oxygen in it, it's the least compressible fluid on the market and it really good for your seals. I'm completely sold on Pro Speed 683
any brake fluid in the Cup of Coffee is gooood.
Old 06-01-2012, 03:46 PM
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Izzone
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Originally Posted by TRD0524
On most proper race rotor setups you can use the hats and do not have to replace them (AP, Brembo, PFC, Alcon, Endless). Some designs allow the hats to last longer than longer due not stressing the hats so much. In professional motorsports, the AP design is the most popular because it has almost 0 stress to hats by keeping the "float" on the brake disc and does not carry any of the of the extra weight of the PFC mounting system.
AP design is good, but it requires a bit more precision when installing the hardware since the hardware takes the torque of the stop

Also I believe AP / Brembo require new hardware when changing rotors

I like simple
Old 06-01-2012, 04:29 PM
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Doc GTO
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Originally Posted by mdrums
I've been using Pro Speed RBF 683 and have not boiled it. Indy, NASCAR lots of ALMS and Rolex teams have switch over to this fluid.

I found SRF to feel more mushy all the time and sometimes I had thought I boiled it but really didn't. Pro Speed have less oxygen in it, it's the least compressible fluid on the market and it really good for your seals. I'm completely sold on Pro Speed 683
Ditto with the new Prospeed 683. It has a ~480 wet boiling point as well.
Old 06-02-2012, 12:18 AM
  #19  
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SRF here, never had problems on my GT3.

GT2 had problems, but found out that the car couldn't stop with Pagid yellows
Old 06-03-2012, 01:03 AM
  #20  
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Originally Posted by NJ-GT
You should try the PCCB with PFC-08, the bedding-in procedure on PCCB requires 50 iterations of go/almost-stop from 80mph down to 20mph, I have it written somewhere, makes a huge difference. The best pads I have used with CCB are RS29 and RS19, but PFC-08 seem to be a better pad.
Has anyone run any of these pads that NJ-GT talks about on their PCCBs?
Old 06-03-2012, 10:42 AM
  #21  
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Stujelly- I don't think you are boiling your fluid, sounds like simple brake fade. With that said I am currently using Endless RF650 after I found out it was factory fill in Cup cars. Previously I used SRF and was perfectly happy with it as well.
Old 06-03-2012, 10:58 AM
  #22  
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Originally Posted by NJ-GT
any brake fluid in the Cup of Coffee is gooood.
I'm just going to take the brakes off the car....slows me down too much.
Old 06-03-2012, 04:15 PM
  #23  
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Originally Posted by savyboy
Stujelly- I don't think you are boiling your fluid, sounds like simple brake fade. With that said I am currently using Endless RF650 after I found out it was factory fill in Cup cars. Previously I used SRF and was perfectly happy with it as well.
Agree with Endless RF650. Running it in my RS. Did track day at over 100F yesterday and had absolutely no fade and no problems. Except for ripping off the front plastic brake ducts....but that was my fault! Even with no brake ducts, wow.
Old 06-03-2012, 05:14 PM
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Originally Posted by mdrums
I'm just going to take the brakes off the car....slows me down too much.
Mike, put that car on the dyno, and put it on the scales with a full tank of gas, it would be a good start to check where it stands. Then suspension and weight can be dialed better, right now you cannot corner weight your car, and that makes a decent difference in track pace.
Old 06-03-2012, 05:59 PM
  #25  
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RF650 here as well. Been using it for two years now and no boiling and no change in the pedal as the day goes on. This fluid works well with PFC08's.
Old 06-03-2012, 09:16 PM
  #26  
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Originally Posted by savyboy
Stujelly- I don't think you are boiling your fluid, sounds like simple brake fade. With that said I am currently using Endless RF650 after I found out it was factory fill in Cup cars. Previously I used SRF and was perfectly happy with it as well.
I guess I should have bought your old mov it set up.

I only happened at the last session of each day. I think you are right about fade vs boiling. I am going to start looking for a way to get more air to the brakes.

Anyone know of any good DIY on getting more air to the front brakes?
Old 06-03-2012, 09:21 PM
  #27  
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I found another post on the endless fluid, looks like there are 2 schools of thought here. SRF and Endless. Thinking of trying the endless. I experienced what fc racer was talking about in his post, still good bite, but longer pedal travel.

https://rennlist.com/forums/997-gt2-...id-review.html
Old 06-03-2012, 10:00 PM
  #28  
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where do you buy the endless fluid??
Old 06-03-2012, 10:06 PM
  #29  
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Originally Posted by fc-racer
RF650 here as well. Been using it for two years now and no boiling and no change in the pedal as the day goes on. This fluid works well with PFC08's.
if there are no proper ducts and cooling any fluid will boil. with proper cooling any racing fluid should be fine. all we talk about if a difference in boiling point of 50-80 degrees. it is nothing if there is no proper airflow there to cool down rotors.
Old 06-03-2012, 11:27 PM
  #30  
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Originally Posted by NJ-GT
Mike, put that car on the dyno, and put it on the scales with a full tank of gas, it would be a good start to check where it stands. Then suspension and weight can be dialed better, right now you cannot corner weight your car, and that makes a decent difference in track pace.
I'd love to weight it...I think Vortex in Tampa might be able to set up scales. I haven't found a all wheel drive dyne in Tampa yet. I'm only rear wheel drive but PDK computer freaks if front wheels are not moving. I'd love to do a couple dyne runs to see where it's at...just not sure where to go and get this done.


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