LSD and sway baby

[Mike Usiskin]

Hi folks,

Now I know many of you imagine I know all about LSD (Obviously I couldn't comment in the clear) but I'm not clear wether I want one in my uber 'T'. I'd like to add anti-roll bars front and back as well to sharpen her up a tad but what is 'anti-sway bars" Is that just an americanism? info needed people.

ta

[Mick Cliff]

Sway bars are an Americanism for ARB's I believe.
I also think the Americans sometimes call them 'Charlie bars' [why?].

You'd be advised not to trust my beliefs and seek confirmation from "those that know"

[jamie]

Mike,

LSD, Charlie... Speed... err...

I don't know where I'm going with this...

Anyhow, if you plan to fit a factory rear ARB, do yourself a favour and check your mounting-point situation beforehand. You need two mounting brackets which are welded just to the rear of the torsion bar. Being a T, you might not have them.

Then you need two peg-like things at the end of the banana arms. If you don't have these, you'll need them welded in as well. Difficult to explain, but there's a flat bit that you drill into, and another bit behind that supports the back of the peg. Mine didn't have the back bit, so after months of accumulating all the correct bits, I had to abort the project. As a result, I currently have almost all the bits needed for an early rear ARB setup, sitting in my shed, doing nothing...

Which is annoying.

Undecided on diffs. I love them, and the same thought has crossed my mind before, but in a 911 surely just asking for 'the bad thing' to happen.

[johnM]

As mike and jamie have said its not a five minuet job to install rear anti roll bars, you can see what jamie was on about in this picture the red circles are the welded on ball for the anti roll bar links to fit on and the green circle are the mounting points for the bar onto the chassis.



As to LSD these are getting very expensive and when you find one they are more often than not in a sad state of disrepair, they need to be set up correctly and once you are in your gearbox you may as well have it pulled apart and checked to make sure its all ok. You can buy new LSD units and there are a couple of different types on the market Mike Bainbridge has fitted quite a few to various cars most being historic rally cars. I would have one in my car but can not justify the cost, for road driving my hunch would be that they make little difference I would think that they come into there own once you have your car sideways, I had a couple of caterhams one had no LSD and one did, I track dayed both cars and they were both great, the one with the LSD was more controllable and progressive once sliding but for the most part it made little difference for fast road use. Maybe someone with more experience with LSD's in early Porsches can give some more relevant advice.

Kind Regards

[Nick Moss]

With the amount of traction that a 911 has, you really need a lot of power before you need an LSD, unless you are using the car on low friction surfaces. A new Quaife LSD is not expensive, at £811, but, as John says, there is a bit of setting up involved. We are doing one for Ferry Man's hot rod as I type.

[Alan @ CanfordClassics]

Hi Mike,

With regards to the rear anti roll bar, do not worry too much if you do not have the mounting brackets there are straight forward to add.

I had a Gripper LSD in my 71 car but Mike B has just changed it for me and I have now gone with a factory Porsche LSD. My original LSD has just 2000 miles on and has been stripped correctly lubricated and set up correctly and will be for sale soon.

If you want to test drive an early car with LSD feel free to pop down again as my car will be back on the road next week

Thanks

Alan

[pete917]

I have just blueprinted a G50/00 for a G50 conversion from my original 915. I have installed a Quaife. £800. Have not driven it yet but am looking forward to the experience. Will let you all know how it feels once its done.