Excuse the ignorance but can someone give a brief rundown how these works to alleviate ABS issues.

 

I'll try to answer that seriously because I take it as a serious question.

The new 997 Cup Cars use dual manual master cylinders with a bias bar for braking. That setup is a purist setup and also very effective under skilled feet. This solution means NO ABS -- you eliminate the ABS controller entirely. But in the grand scheme of things people will argue that not having ABS is just as fast but it will obviously increase the number of flat spotted tires.

In my personal opinion, going the speeds I go with my 996 and using ABS ESPECIALLY during trail braking in decreasing radius turns, I want the ABS!

The low-buck option is clearly dual manual masters and learn how to be a better driver. If you want ABS, that is what this thread is about.

 

I should add that the 997 cups don't have ABS because of racing restrictions, not because non-ABS is faster.

 

Right. Thanks Darren. I though the implication was to run the Tilton setup in conjunction with the ABS and that's why I asked my question. I tend to agree on the ABS choice. I'd rather have it than not. Therefore my question still stands.
What system (short of the Bosch Motorsport one) would / could one use on a project car?

 

Patrick, you can run the Tilton dual master cylinder setup in conjunction with the ABS. It will be better than having a proportioning valve (regardless of whether or not it is adjustable) and will be more flexible than using a "balanced" set of front & rear calipers.

 

I know that TRG uses some BMW ABS controller on Koni cars (Porsches) and I'm super curious which one and how that all works.

 

My implication was ditch the ABS if you can't afford a good one, and run a manual adjutable prop system.

ABS is much easier to screw up than get right.

 

If the 'good one' is only the Bosch Motorsports then that's a difficult choice Vaughan...but is it the only good one?
What about the BMW one and what sort of $$ ?

 

Not ever having played with a Tilton type setup I wonder on how you would actually dial it in? Is it a matter of driving until you flat spot each tyre and dial it back a bit? I know that sounds stupid but I have no idea how this would work in setting up.

 

First you have to size the master cylinders for your application. Tilton will help you do this and get you close. Then you have an adjustable bias bar on the pedal assembly which you use to further fine tune the distribution. On my Acura installation I also used a limiting valve (don't call it a bias valve) like Vaughn pictured above that runs to the rear brakes. I use the limiting valve for quick adjustments.

As far as dialing it in you have to see which brakes lock up first. You want the fronts to lock up first because when the rears lock up first that's a great way to spin.

In the rain you can dial in a little more rear brakes because you don't get the same weight transfer to the front of the car.

Properly done this type of setup is very adjustable. It's the way Real Men drive! I'm a girl though I want ABS

 

^^^^^^^^^^^ Instead of Darren, we will call you Darrica or Danica now. (closet girl name).

 

Also please note that some of the 997 Cup guys are retro fitting a 996 Cup ABS unit to their cars... mmmmm!

Darren, you need to fill me in where we left off, I have an older 996 Cup ABS unit, think we last spoke regards the wiring?... I'm heading to SPA at the moment and then onto Nurburgring, will be another week before I return, need to catch up.

 

The other one is a reprogrammed BMW unit, not one off the shelf of your local BMW dealer. The most important part of it is the software although all is needed plus a wiring harness custom made for your car plus possibly lines depending on which system you currently run.
Cost ? Figure $7500.00 +/- depending on what you have to start with and what your needs are. There are a few sources for it if interested PM me for more details and even to arrange getting it installed in your car.

 

O.F.V. I'm a bit off from pulling the trigger just yet. I am going to do some more research, but by all means pass on your opinions or experience.

 

I've driven or built cars with all of the systems discussed here so far, what opinion or experience would you like to know ?

I guess my first thought would be do you really need it ? Are you experiencing "black ice" feeling ? If you have to ask what that is then you are probably not experiencing it.
Running slicks or equally sticky tires ?
Does the race group you run with allow alternate systems ?
Do you drive very bumpy tracks ?

If you answer is yes to all or most of those then the alternate ABS system is for you, figure out a way to pay for it and make it happen, you won't regret it. There are people down under that can install it and it's no problem to get it shipped to you.