early 944 brakes, stock MC....dosent feel right

[jrinlv]

Sorry I'm too lazy to go look at what you want to do with your car but most "pro" drivers hate anti lock brakes, they say it takes the control away from the driver, but for the street no problem. Just a thought, take care and good luck. JR

[1303R]

what "pro driver's"? i wonder why most modern cars have them fitted?

[super vw]

All the GT3 Porsche Factory CUP cars have ABS. works fine... better really once you know how to use it. all you do is mash the brakes and you can never lock up .

[Bug@5speed(US)]

I also have been following this thread, and while my car is still on block, I am very interested.

I have installed the front 944 N/A set up on my car but not run it yet. Intent is to play with the piping and run the 944 MC with a proportioning valve.
I have been pondering a few things. Since this car will run about 75% track (HPDE) and 25% street, my focus is on getting the car set up properly.

From my previous experience playing with different piston calipers, as well as sized, I know first hand the impact this can have on bias as well as feel.

I was thinking of changing to the 4 piston similiar sized (diameter) 944 turbo set up for the purposed of feel. My experience with different track pads on dual piston sliding has been that they tend to be very on/off switch like. With the multi pistons it seemed more progressive and the feel was nicer. Again some of this is a function of the pad (usually carbotech XP series, which have a high initial bite).

So without rambling to much, any thoughts on using a 4 piston front and single piston rear with 944 MC? Which way to pipe, and if prop valve needed.

VR
Alex

[1303R]

the trouble with four piston calipers is you need the hubs that go with them from what i've heard, or some sort of conversion caliper mount. the rears are same hole spacing thou, so they easier

[speedy]

well with that setup i don't think you will be needing the bias valve .
the surface area of the pistons on the front will be quite large compared with the standard giving you a larger front bias ,I run 996 4 piston calipers all round and really like the feel of them , like you said they are not grabby at all plus mine were from a rear engines porsche i would think was more suitably set up for a rear engined car.Im sure mr porsche did all the calculations for me .
To use the bias valve you will have to slightly over bias the back with larger rear pistons on the calipers or improve the grip on the front end to such an extent the rear looses grip first , personally i will be after a balance bar setup when i get round to the next stage in my cars evolution as when sorting the bias it is cheaper altering the bar with a spanner than swapping the calipers etc .
As for the m.c acording to my calculations i does not matter which way round it is just the 23mm piston will supply more fluide but will not alter bias, i use a 19/19 with my setup

[Bug@5speed(US)]

With regard to using the 4 pistons, I should have mentioned ditching the old and starting over via one of the many ways: 944 T spindles, or Machined beetle.

I have seen a kit that wilwood makes for the 944 but seems to pricey, maybe I could talk to Lanner to effectivlye do the same for cheaper, Rennlist approx 8-900.

I will leave the rears alone, 944 NA, as they are quite large, and don't think heat dissapation will be an issue. I can probably play around with rear bias thru pad bite, friction coeffecient of the pad. I

I have both type I and the 944 23/19 MC's so I could play around with that also. Not to sure how the bar setup works but I assume this is with independent front and rear MC's

Again, figured I would ask since pedal feel is an attribute that I rank high.
VR
Alex