333pg333

btw Tony. A 1.75 sec improvement is great first time out. What times are you doing to put this into context?

TonyG

I have. I have had several track 951's with factory ABS. And I have taken all of them out. That's how bad they are. The cars, in the hands of an experienced driver, are considerably faster without the factory 951 ABS.

Why? Because the factory 951 ABS system is extremely slow in its activation with far too small of a pulse, occurring way too slowly, and is far to easy to activate.

In short, on a race track it's junk.

TonyG

Dubai944

Is the S2 ABS the same system as the 951?

Olli Snellman

Yes it is

All '87 & '88 arms does not have holes for the sensors. My son's '87 Swiss import model had not them and also my '88 US model lacks them as well. Non ABS arms can be easily modified to accept sensors. Same thing with non ABS '87 and newer spindles.

I would like to know the part numbers of ABS pieces Tony used, We are going to install ABS to son's project 951, but at this point it would be easy to use Boxster parts instead of 944 S2 system we have.

Dubai944

Good demonstration of ABS vs non-ABS

docwyte

So if the car already has factory ABS, all that needs to be changed is to swap the stock ABS pump over to the 986 one?

TonyG

From a 1:28.8 ish to a 1:26.7 ish

It's very substantial.

The top super fact POC GT2 cars (highly prepared 996 cup cars/996GT3 cars with excellent drivers (quite a few professional)are turning from high 1:23's to an average of a mid 1:24's.



TonyG

TonyG

Yes.

A 2-row (the pins on the connector) 986 pump.

Note: You will have to rearrange the brakes lines where they enter the stock pump so that they align with the correct respective ports.

Also you will have to know how to pinout the 986 wiring harness so you connect up your wheel sensors, as well as a abs light, and finally an aftermarket OBD2 female diagnostic plug so that you can take your car to someone that has the factory Porsche software and PCMCIA card setup to reset the ABS and troubleshoot it if necessary.


TonyG

Dubai944

So the pump is wired for power only? There is no seperate ABS Controller needed as with the stock system?

marcoturbo

Tony, where does your 986 pump sit ? Is it as big as the factory 951 unit ?

Thanks

JET951

Thats a great Picture. But even with ABS it would seem that vehicle on the left(dog) is still going into the wall(water) lol

TonyG

That is correct.


TonyG

TonyG

I don't have a stock 944 ABS pump handy, but from recollection, the 911/986 ABS pumps are smaller.

Mine is located on the center tunnel under the dash.


TonyG

Dubai944

Sounds like an easy improvement for those of us with factory ABS. Personally, I haven't found the factory system completely worthless. I did do some tests originally with it disconnected, but although I was able to match my times with a bit of practise, I was never able to eliminate the occasional lockup and flat spotting race slicks is too expensive for me so I have continued to run with it.

This does sound like a real performance improvement though. What's the bet there is suddenly a shortage of 986 ABS pumps?

Dubai944

Sometimes it doesn't matter how good your brakes are, you are just going too damn fast...lol