928cs

Does this kind of update make sense for a street car, or is this only for a racing car?
What kind of money are we talking about for a complete kit, to replace an S4/GT/GTS system?

Great work, I'm sure.

Darklands

I can read:"Only for race" on the pump. In Germany I think not street legal!

MattiasH

If it is the Bosch Motorsport ABS M5, it seems you can buy it for 5775€ before tax.
https://www.kmpdrivetrain.com/produc...abs-clubsport/

Wonder if it is possible to have a less advanced system with a smaller price tag.

andy-gts

I smell money flying around.......whew.......very cool

GregBBRD

Price a new vehicle that will perform as well as this car...and look as great as a 928.
Difficult to find....and definitely not cheap!

And creating a one off 2021 928, by hand......using modern technology to build the ultimate 928....isn't going to be cheap, by definition.

Fortunately, most of the technology to accomplish this extraordinary project exists and is used every day on multiple other vehicles. (Bosch packages very evolved ABS systems and offers them for sale, because there is a demand.)

Adapting that technology to a 27 year old car is the puzzle.
And admittedly, that takes thought and time.

GregBBRD

Very doubtful that someone with a stock 928 street car would benefit from this....right up to the point where they need to make a panic stop to "save" their precious 928 from becoming junk.
A 40 year old, three channel ABS system isn't going to outbrake any modern car...
Smile as you go into their rear bumper.

Sorry, I haven't even thought about prices for anything I've developed, for this car.
I'm not "marketing" here...not in the least.
I'm simply showing a project which challenges my abilities and therefore interests me.
I'm hoping that others will enjoy reading about this vehicle, too!

928cs

I do and thank you for sharing.
In my mind, a modern ABS would make sense for a pure racing 928, providing a more efficient and tunable system than the original.

GregBBRD

We've got more than one of a fully evolved 928 in the queue....mostly street cars. There's no doubt that all of these cars will get a more modern ABS/braking systems.

Having the lowest priced modern economy car outbrake almost every original 928 ever made makes little sense.

Doubling the original power output of an early 928 has become simple, for us. Building a car that can corner at over one "G" is also a simple thing to do, given modern rubber.
Leaving the original ABS/braking system, given the new abilities of power and handling that we can build, makes even less sense, to me.

GregBBRD

Certainly, one could "borrow" a more modern ABS system from some other vehicle and use it in a 928.
Will it ever be programmed for the weight, individual corner weights, and vehicle dynamics of a 928?
No.
And because it is not specifically tuned for a 928 application, could it be potentially dangerous in its characteristics?
Possibly.
ABS braking is tuned to work at the "limits" of the vehicle's performance, by definition.
Incorrect "tuning" or incorrect vehicle application (I put a Mercedes system out of the junk yard into my 928, by golly!) would almost certainly be an issue, at these limits.

Unless someone has Bosch specifically program/tune a system that is unique for a 928.....and then two obvious problems comes up.....which model 928.....and what does that cost?

Bosch has packaged such a system.
Modern ABS, which a current technology car would have stock, and made it programmable for specific vehicle weights and dynamics.
And it's adjustable, for different weather/driving conditions.

Does it get any better than this?

GUMBALL

I agree with you on the limits of the original ABS systems. When we ran the 1988 Canadian Rothmans Turbo Cup series, the top level drivers in that series (Spenard, Goodyear, Nierop, Adam) told me that they could control the braking threshold level better than the ABS system, consequently, they turned it off. . . . . that was 1987-1988 technology.

Tony

So, is there a chance of you being able to add traction control with this new system now?

GregBBRD

Not by me...there's a limit to what my tiny mechanic's brain can do!

We will still be relying on the "right foot" traction control.

GregBBRD

Probably the same generation as a 928.
Porsche didn't bother running two brake lines to the rear wheels on a 911 until a 1995 993 Twin Turbo....everything before that was still 3 channel, with the rear wheels hooked together.
Pretty crude, by today's standards.

The Forgotten On

You can "easily" do that with a standalone system like a Link G4 Thunder https://dealers.linkecu.com/G4PlusThunder

All you need is an ABS signal to the ECU and you can either program it to either cut fuel, timing, or both.

I plan on doing this in own car by adding rear ABS sensors, hubs, and half shafts, and then connecting them to the ECU.

If you already have a car with ABS its even easier as you already have the basic hardware installed.

The hardest part of going standalone is getting a correct base tune for the engine though....

Tomkat80222

I just assumed since Porsche was using the ABS sensors to activate the PSD that they would activate the breaking on an individual rear brake. I guess at the time the main interest in ABS was to keep the front wheels from locking up for better directional control and stopping distance.