macr88

Link to info on the new PF11's in this thread HERE


Below is what this post was originally about, suspension related issues which I thought were brake related issues at first.


I recently ran the 97's in front and Cobalt XR5's in back and was having rear ABS issues.
I'm assuming this was happening because of the difference in torque curves?.

Was curious if there's anyone out there running or has run 97's front and rear and if so what your take on them was.

This is in reference to stock brakes and not BBK's as I'm sure 97's would be totally fine with BBK's.


I've only been able to talk to one other person about this and will most likely try 97's on the rears as well but wanted to see if anyone else has had experience with these.

I originally had XR3's in front with the XR5's

Thanks />/>/>


edit: I think I found the problem

After further thought and some looking into the car this evening I think it may have been an issue with the new sphericals being too tight.
I installed the rear lower control arm sphericals and bsk which consists of 5 tight sphericals.

With the dampers all the way soft I used to be able to easily push the back of the car up and down, now it takes quite a bit of effort to compress the suspension and the way it returns is wonky as well.

With the rear unloaded and less spring rate to overcome the stiction of the bearings I think the rear tires were just floating over bumps and loosing traction.


I'm going to loosen them up a bit and hopefully I'll be back in business again, this last track day sucked as far as times go was only able to pull off a high 2:07, I should have been in the 2:03-4 range this time.

I'm also going to see what force is needed before they breakaway just for my curiosity

I hate changing multiple things, especially when things go backwards.


edit 2, it was the BSK
Installed a new version 2 BSK and was back in business. 11/17/13 at Thunderhill I pulled a 2:03.9 back to back and the last session of the day I beat that following Matt but my data logger was off.
The brake pads are awesome for sure, carbotech and cobalt have nothing on performance friction.

06Estukay

I'm running PFC06 in the front, and PFC 97 in the rear. Haven't had any abs problems at all. I've also run pagid rs29's up front with PFC97 rears, and no problems there either. On top of that, I've tried both carbotech xp8 and xp10 rears with both the pfc06's and pagid rs29's up front. The carbotech xp's did cause a bit of initial rear brake lock (abs'ing) upon initial application.

I would agree that the torque curves are different, and are causing some havoc... The pfc97's have a very, very flat torque curve with a slight rise with temperature. If I had to guess, I'd say that cobalts have a larger increase of torque over temperature vs the pfc's.

Are your rear abs issues occurring during brake application, or deeper in the brake zone?

macr88

Deeper in the braking zone.
Are you running a BBk? They said the 97's were the only thing available

06Estukay

Yes, I'm running a BBK. PFC makes both the 97 and the 01 compound for the front s2000 caliper. Try throwing the PFC01's on there!

Sounds like the cobalts have more of a rising torque vs temperature curve compared to the PFC's.

macr88

They don't stock PF01's for the S2000 or at least that's what Performance Friction said. Some distributor may have ordered them a while back and still has stock I suppose. Where do you get your performance friction pads from?

afzan

Raceshopper.com

I'm running 08 (bbk) / 97. Love em, they stop way better than 06estukay's 06/97 combo />

macr88

Waiting for raceshopper to get back to me but they only listed the street pad and the 97's

boyguan

i tried to order some pfc01 and no one has it. i think that it is discontinued. my friend had them on his car and the bite was amazing compared to my carbotech xp10.

not sure what to try next

macr88

This is what raceshopper replied with

"97 only: If you need something higher you might try the Hawk DTC-70, it is similar friction to the 01."


I'm sure if there was enough demand they'd make it but I doubt that'll be the case, I think I'll try the 97's all around and go from there.

06Estukay

Ahh they must have ran out of stock of the PFC01's, and decided to not replace it. PFC will make them, but there is a minimum o order quantity of like 10+.