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

[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

[mabbo]

bug@5speed:
did you ever get the 4 piston 944 turbo calipers fitted to the front along with the 944 single slider rears? this is one of the options i have been considering..
mabbo

[Wally]

I have had the 23/19 944 MC on the car for a year or two now and have just changed it out to an original bug 19/19mm MC.
Will let you all know how it works out

[Simon]

Originally Posted by mabbo

bug@5speed:
did you ever get the 4 piston 944 turbo calipers fitted to the front along with the 944 single slider rears? this is one of the options i have been considering..
mabbo

I'd get something bigger for the rears (or something smaller for the front), because the rears can handle more braking than you'd expect (Weight distribution stationary is about 40:60 front:rear, and it doesn't change as much when braking since we have a rear-engined car )

[jmd]

wally,
Why if its running, make the change to the other MC?

I am setting up a 4pot porsche caliper (944T) front/rear (bigger front pistons) and have the 944T MC but not installed (its a bare pan at the moment). I have followed all these posts and their multi-directional advice and am still a smidge confused.

Is there anyone running a finished car that uses 69' -ish IRS chassis with a full front/rear 944T brake conversion that is up and running smoothly for a little while that can comment on how it works??

If so, did you replace all the hard brake lines?
Also, did you use the original VW hard lines or did you convert the hard lines from the MC to the Calipers to use 944 stuff?

Is there anyone actually running an MC that is setup with a balance bar / proportioning valve? If so what parts and are there images of this configuration.


As useful as our forum is there is data allllll over the damn place... and all of it is in total bits and pieces with loads of speculation and opinion instead of historic and documented fact... is there one single post for a few things such as "944 Brake Conversions - all you need to know from calipers to MC's" or "944 Suspension conversions - all you need to know from alu arms to steelies to skinny or fat stances (not so important as the brakes)"... this type of 'organized' information would be awesome to reference...

and as much as asking a question around here gets the standard response "Its in the forum look it up"... well, thats all well and good but the community is to support its fellows by organizing and quantifying that data into useful and organized chunks, hopefully validated with user experience and images to support the learning curve...

Is there anything I can personally do to support this effort?

[Wally]

Originally Posted by jmd

wally,
Why if its running, make the change to the other MC?

I still had too much front bias, Weird, but true for me.
The 944 23/19 MC gave a VERY high and super hard pedal, but too little braking force imo.
The 19/19 stock MC gave a little less pedal effort and a normal high and hard pedal. Not the dramatic change I'd hoped for, but its a bit better now.

Sorry that this is probably again confusing wrt others experience
Maybe you can conclude s/th from that (seriously though)