340Elise

Hi All,

I am just about done with my PCCB conversion and now I need to bleed the brake lines and top it off, or change the brake fluid completely.

Could someone tell me a brand of brake fluid that I can mix with what I have that I can buy at my local auto parts store? Or, if I can't mix it, then a decent brand that is approved for the 997 GT3 that I can buy at my local parts store?

I also put in stainless steel braided lines since I was already in there, and I captured about 75% of the brake fluid that was released/contained within the calipers and OEM rubber lines. In total, approximately 8 ounces drained out, but I have 6 ounces of that.

I will order the good stuff later if need be, but I need a quick source for now. If a standard GT3 "street" grade is not available then I will wait, but I was hoping to do some minor testing tomorrow.

Thanks in advance for any help you can offer.

Stephen

911/Q45

Any DOT 3 or 4 is compatible with any other, just stay away from DOT 5.

mooty

any motorcycle shop should have motul 600, that's DOT4.

while DOT 3 and 4 is interchangeable, somehow porsche service manual insiste 997 and 996 use DOT4. i heard that from my dealer and they will not put DOT 3 in the car.

340Elise

Thank you! Motul 600 would be perfect, but I missed the boat on that one if it is only going to be at a motorcycle shop.

I think I will wait until Monday and just get the Motul.

Stephen

OldGuy

I use the ATF Blue but I was thinking of changing to that $75 a quart stuff (castrol?) becuase
part of the reason PCCBs go bad is because Porsche guys think they are high performance brakes and use them as such. The Brake fluid in our stock cars is not good enough and starts to boil. that throws off the ABS system and it will eat the PCCBs up overmodulating the pads. Putting in the right brake fluid REALLY helps the whole PCCB story too.

C.J. Ichiban

+1 og

340Elise

I certainly plan on putting in a better fluid in the future, and I am currently researching that. For now I just want to pick up some fluid that I can mix with the stock stuff for now.

PCCB's, to me, have these 3 advantages over the stock brakes, but not much else (of course they also have disadvantages, but seem to be an excellent choice for what I am trying to achieve and my current skill level):

SIGNIFICANT reduction of rotating unsprung mass (44 lbs, ask me how I know), and ALL of it (worth mentioning anyway) is in the rotors only (Did you ask me how I know?).

More fade resistence (based on what I read, but not sure how much).

Hardly any brake dust! Really? That is a nice bonus that I just learned about recently; I gotta see this for myself.

That is about all I can think of right now.

John Boggiano

You will get brake dust when you use it on track, but less than with other brakes. On the road, I get almost none.

Oh, and you forgot feel. The PCCBs are really feelsome and there's real pleasure in modulating the pressure with them in a way that steel brakes (all of my experience at least) can't match - they are a precision instrument.

OldGuy

Stephen How do you know?

todinlaw

I use Motul 600 for the track and street and have no complaints. Never any fade and I really hammer my pads and rotors. So for the money I think its a good value and safe if you bleed then after heavy use.

340Elise

Because I did the conversion myself and weighed all of the parts taken off, and all the parts going on. All were weighed on the same scale at the same time and with several different techniques, and multiple times, to ensure that the results are accurate.