captainOCD

My Charger has an electric pump with a hydraulic rack. I was curious and dug around in the service manual for it, and apparently it operates the same way, it always is running. I always figured it was watching the steering angle sensors for changes, but guess not. Today I learned.

The Forgotten On

IIRC there is a kit for the 911 using a Prius pump for electric power steering. It's about time someone made one for the 928!

Clever use of the smaller 78-79 vacuum door lock reservoir in place of the original one too.

One thing I am curious about is the ABS.

Without getting into specifics did you take one out of another car along with its computer and wire it in place of the factory unit with fresh rear lines or did you go a bit more exotic?

It sounds like a worth while update if it can react quicker and with more accurate modulation.

andy-gts

WOW, just read the thread and I admit I am more focused on getting an 89 gt but this is soooo cool and glad to hear the engine didnt need too much , the monster gts Greg built was soooo powerful , I only chose to bring the GTS back to Greg as he knew who could use that creation best, I was never using its potential......!!!!!!! pushing that engine was intoxicating to say the least, I am following along drooling !!!!

GUMBALL

Just curious (if that is not classified) are these shocks 2 way or 4 way adjustable ?? Are the fronts the same ??

GregBBRD

Two way. All four shocks are the same.
Plenty of adjustment, unless you have a full on race car, with data, in my opinion.
If we need more, I have spare canisters with high and low speed.

GregBBRD

And just think, Andy, I'm trying to "find" 10% more horsepower....and loose 10% of the weight of the vehicle.

GregBBRD

For sway bars, I'm starting out with the stock pieces, and only adding the more robust, adjustable, gorgeous drop links that Hans SerVass builds.

Like everything Hans makes, these kits are very close to perfection, out of the box, and require a very minor amount of hardware changes, to meet my specifications.
Stainless spacers, Stainless monoballs, fully adjustable for both length and leverage.
And, very important, the rear drop links are incredibly stronger than the stock drop links, which are prone to bending and breaking.


Fantastic pieces!
If you are trying to improve the handling of your 928, these pieces should be at the very top of your list
(Corner balancing a 928 is futile, without adjustable drop links, which are essential, in order to be able to set swaybar preload to zero.)






Hans' Front Sway Bar Drop link Kit



Han's Rear Sway Bar Drop Link Kit

MattiasH

This will be a very interesting thread to follow. A track day car that still should be able to be driven on the road is also my goal, with a much smaller budget. I will be here and look for inspiration

Interesting location for the steering pump. The pump itself looks similar to ones used in Peugeot or Citroën. I decided to buy a pump from Mercedes A-class, which seems to be used by BMW motorsport.

GregBBRD

The front brakes are relatively simple, for now. (So the stock 17" wheels will still fit onto the car.)

I substituted 332mm x 32mm front rotors for the original 322mm x 32mm rotors and spaced out the stock GTS front calipers to compensate for the bigger rotor.
I chose to initially use a very heavy duty rotor, for this application, so the weight savings is minimal.
If this proves to be an adequate amount of braking, we may try a lighter duty rotor and save a more significant amount of weight, later

Brake lines are Goodridge, of course (I'm a stocking Goodridge dealer.)
Brake pads are Pagid.
Wheels bearings were removed, cleaned, inspected, and repacked with new seals.


332mm x 32mm front discs with a custom aluminum center hat.

GUMBALL

To quote Mark Donahue (regarding the Porsche 917-30) . . . . . . "when I can spin the tires at the end of the straight, then I have enough horsepower"

Also, in regard to the braking system. May I suggest drilling a small (3/32") breather hole in the center of the dust cap. We found that when the brake assembly got hot, it would blow the dust cap off, or try to push the seal out.

GregBBRD

Thanks for the tip!
Although I've never had that issue, it's super easy to do, with virtually no downside.

dr bob

It really needs to have a fluid-recovery vent, so when the system cools off and the fluid goes back to normal size, it draws the 'lost' liquid back in. Or remote the whole reservoir to somewhere it can be cooled, and run at half level with at least the same mass of fluid. so room to expand without loss..

GregBBRD

That is correct, about the original fitment of the pump.

I bought my first kit from LN Engineering/BRS, for a 996/997 mechanical pump retrofit. That is the pump they used and it fit very nicely in the location I had chosen for it.
The "kit" they supplied, for use in a 911, was very nicely done.

However, since I had to make a new bracket to support the pump, needed to isolate the pump from radiating noise, and had to change the hoses, the wiring, etc., I found myself just using the pump and mounting clamps out of the "kit".
It's more practical, for my own use, to just make up my own "kit".

The Forgotten On

I bought 2 sets of them front and rear for both of my cars in the last group buy he did. They really are quite nice and highly recommended if you can get a set!

GregBBRD

ABS:

I've spent a few weeks trying to figure out how to approach this subject, without giving away days and days of proprietary information about mounting, sensors, sensor mounting, loom routing, etc.

I think I'll just post this:



And simply say that if anyone ever wants to install a modern, adjustable ABS system into their 928, I have the ancillary pieces made up that you need to accomplish this task, which will save you days and days of work.