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New PSD in action!

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Old 11-15-2019 | 02:42 PM
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Default New PSD in action!

Hi All

After many many hours of fault finding, I now have:

1. A rebuilt PSD by Harald Stein
2. A new solid state LAS from John Speake
3. A repaired ABS ECU (pin 15 fuse) by John

No more error message!

But.....how do I know the LSD is working? I've read on here somewhere about finding a gravel area, but being on a small island, we don't have many of those. Even if we did, what am I looking for in new car behaviour?

Thanks!

John
Old 11-15-2019 | 02:49 PM
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With the rain that is coming down in the UK at the moment just mincing the throttle should see the green light come on. That is an indication that the PSD is doing something but exactly what is a mystery given it can apply lock up anything between the range of zero to 100% depending on what the ABS computer has determined is needed to get things under control.

Not everyone likes this- I think that for its day it was brilliant and still is.
Old 11-15-2019 | 02:50 PM
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Originally Posted by FredR
With the rain that is coming down in the UK at the moment just mincing the throttle should see the green light come on. That is an indication that the PSD is doing something but exactly what is a mystery given it can apply lock up anything between the range of zero to 100% depending on what the ABS computer has determined is needed to get things under control.

Not everyone likes this- I think that for its day it was brilliant and still is.
Ooooo, there's a green light?

The PSD hasn't worked since I bought it.....
Old 11-15-2019 | 03:08 PM
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Originally Posted by jchasty
Ooooo, there's a green light?

The PSD hasn't worked since I bought it.....
Let's hope the little green light still works!

It is a very reliable system providing the fluid is changed every couple of years or so just as you would [should?] your brake fluid given the stuff is hygroscopic [i.e. absorbs water].
Old 11-15-2019 | 03:13 PM
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Thanks Fred - will give it a boot-full tomorrow and see what happens - plenty of rain in Dorset!
Old 11-15-2019 | 03:32 PM
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Originally Posted by jchasty
Thanks Fred - will give it a boot-full tomorrow and see what happens - plenty of rain in Dorset!
As long as you do not end up in the middle of Lulworth Cove-
Old 11-15-2019 | 03:35 PM
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Originally Posted by FredR
As long as you do not end up in the middle of Lulworth Cove-
Now that would be a story!
Old 11-16-2019 | 10:45 AM
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Went out for a "spirited" drive in the New Forest and plenty of flashing PSD lights and strange noises behind me, so assume it's working!



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Old 11-19-2019 | 10:15 AM
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John,
I see you brought some forest home with you!

Yes - mud, grassy verges all will work well for PSD testing. I'm originally from Southampton - so I know you have just endless options for this...

Though likely quite rare for you - ice patches would be ideal too.

Alan
Old 11-19-2019 | 11:29 AM
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I did some brake torqueing to 6K rpm and the green PSD light was lit like a Christmas tree with 2 solid black marks on the pavement.
Old 11-19-2019 | 12:05 PM
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Originally Posted by jchasty
Went out for a "spirited" drive in the New Forest and plenty of flashing PSD lights and strange noises behind me, so assume it's working!


Love them in white, is you ride height stock? Looks great!
Old 11-19-2019 | 02:28 PM
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Originally Posted by Alan
John,
I see you brought some forest home with you!

Yes - mud, grassy verges all will work well for PSD testing. I'm originally from Southampton - so I know you have just endless options for this...

Though likely quite rare for you - ice patches would be ideal too.

Alan
Thanks Alan - Southampton to Arizona is quite a journey!

Old 11-19-2019 | 02:28 PM
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Originally Posted by Taguid
I did some brake torqueing to 6K rpm and the green PSD light was lit like a Christmas tree with 2 solid black marks on the pavement.
Hey, what's "brake torqueing?"
Old 11-19-2019 | 02:32 PM
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Originally Posted by C531XHO
Love them in white, is you ride height stock? Looks great!
Thanks! Yup, set up by Paul Anderson, so should be spot-on

Would you believe me if I told you it was a wrap? GP White turned into Pearlescent White - saving up for an L947 Perlmutt Weiss re-spray...!
Old 11-20-2019 | 10:44 AM
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Originally Posted by jchasty
Hey, what's "brake torqueing?"
Sort of a 'poor man's launch control.'

Put an automatic in gear.
Stand on the brakes.
Floor the accelerator.
When the revs get way up, release the brakes.
Leave big smoky burnouts.

Caution:
Doing it much will destroy your tires (Captain Obvious, at your service).

However, it's also REALLY hard on the transmission. Do it enough (maybe once, maybe more than once) and you will find out how much a trans rebuild costs.


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