SCCA Laguna Seca Race this weekend 6-7-2014 GT2 class for the 928
06-09-2014, 04:54 AM
#18
Rennlist Member
Thread Starter
No, its because you refused to upgrade the rears, and are now xtremely, violently, front biased at the friction levels that they run. (~0.73 thru peak temps)
Id bet you easily ran a lower system pressure and got more braking, before you overwhelmed a likely 90% front biased config.
I cant fix what refusing to listen to expert advice does.
You will disagree with me.
You will attempt to quote data that has nothing to do with the situation at hand.
You will attempt to suggest the 928 is 'different' somehow.
You will still be wrong, but it won't surprise anyone.
I have customers (former, my day job got too busy and I passed it on) that today run cars wayyyy faster and heavier than you, and last over a season on one set of pads and rotors. The difference being they listened to their vendor.
I have spec class cars a shade slower than you, and still heavier..on OEM calipers and rotors, with the same season-long results, where every 2 weekends was new PFC or Hawk material and rotors.
Didja rub some Amsoil on the pads? It might help.
You were told to expect this outcome going in...so now that it DID, "they were no good" is your play?
Id bet you easily ran a lower system pressure and got more braking, before you overwhelmed a likely 90% front biased config.
I cant fix what refusing to listen to expert advice does.
You will disagree with me.
You will attempt to quote data that has nothing to do with the situation at hand.
You will attempt to suggest the 928 is 'different' somehow.
You will still be wrong, but it won't surprise anyone.
I have customers (former, my day job got too busy and I passed it on) that today run cars wayyyy faster and heavier than you, and last over a season on one set of pads and rotors. The difference being they listened to their vendor.
I have spec class cars a shade slower than you, and still heavier..on OEM calipers and rotors, with the same season-long results, where every 2 weekends was new PFC or Hawk material and rotors.
Didja rub some Amsoil on the pads? It might help.
You were told to expect this outcome going in...so now that it DID, "they were no good" is your play?
Im listening.
But, there was still the same brake pressure at the end of turn 2. pushing as hard as I could. fade was obvious. same as the blacks, PFC-01, etc. if they could stop with more force, especially at the fade point where you are using a lot more foot pressure, it will obviously give more rear braking pressure, because the rears are not fading or anywhere near the temps.
there are lots of heavier cars, that are faster, but they have a lot more hp. the only cars that seem to brake better than mine, are the cup cars and that's obvious why they can do that. lighter, and have double the braking capacity. the heavier cars that brake near the same, with a lot more weight have 15" rotors and PFC 13 pads on slotted rotors.
name a type of car that you think is stopping better with higher speed at the end of turn 2, with the same size rotor and the same weight or more.
are you failing the recognize that if you have brake fade, you are pushing the pedal with a lot of force, and the rears effect should be near the same. at all other times, especially with slicks, if you are threshold braking , the weight transfer is greater , so you need less rear brake bias, especially going into trail braking turns, which is most of them. I don't know how you think that a rear bias can cause the fronts to over heat and groove the rotors so badly. but im interested to hear and listen. my thoughts are that the brake rotor is just too small to handle the task.
I want to hear about a spec class running near my times, that are heavier on OE calipers and rotors and only changing once a season....... are they running ST41?
The mustangs that are quit a bit heavier , are running the big brembos, and 15" rotos (two piece) and the pads PFC 13 are the endurance pads, which are twice as thick too!
Lets take this back to the brake pad choice thread. I want to know what I need to do .... I suspect its a bigger rotor so I don't have to cook them to slow the car down for turn 2 at laguna.
06-09-2014, 04:29 PM
#21
Drifting
wow, looked like your were pushing it pretty hard. Some of those cars could really accelerate out of the corners so fast! that orange 911 seemed to carve everyone up! is there a big difference in hp to wt ratio or are all the cars pretty evenly matched….
just a question from bystander ……thanks for the cool video post !!!!!
just a question from bystander ……thanks for the cool video post !!!!!
06-09-2014, 04:36 PM
#22
Rennlist Member
Thread Starter
wow, looked like your were pushing it pretty hard. Some of those cars could really accelerate out of the corners so fast! that orange 911 seemed to carve everyone up! is there a big difference in hp to wt ratio or are all the cars pretty evenly matched….
just a question from bystander ……thanks for the cool video post !!!!!
just a question from bystander ……thanks for the cool video post !!!!!
. the GT2 cars were all over the map. the leaders are the newest cup cars, which have close to 500hp and are 2700lbs. but , the majority of the field in the middle were near the same HP to weight. tires and set up are the majority of the difference. I'm at about 8:1, while many of the fast vipers and mustangs are more like 7.5:1, plus on the newest tires. (and equipped with real racing brake systems). overall the 928 did amazing as usual. for a car that has all stock components, even original bushings and 20 year old suspension, it did great!
06-09-2014, 05:47 PM
#24
Rennlist Member
Thread Starter
YES! and that reminds me to call Igor to tell him. he remembered that lock up and wanted to know if it was the front or the rear. looked like rear to me. just too bad I couldn't get around him there! that was my chance!!
