Discussion
I have my worn limited slip differential in pieces on my workbench and considering if I should simply buy new discs or take the opportunity to change to a different type of LSD. I can't say I find anything wrong with the current set up, but I haven't much to compare with.
The current unit is a ZF with 45/45 ramps and unknown preload.
I understand that 30/90 are more common ramp angles on Caterhams, and the Titan is by many considered a nicer diff.
The car is a ~270hp CSR mostly for track use with slicks. Any input is appreciated!
The current unit is a ZF with 45/45 ramps and unknown preload.
I understand that 30/90 are more common ramp angles on Caterhams, and the Titan is by many considered a nicer diff.
The car is a ~270hp CSR mostly for track use with slicks. Any input is appreciated!
Speak with Titan. They're really helpful. The choice of ramp angles may also vary depending which friction material you use. They do a neat solution using carbon plates.
Another good source of advice is Phil @ Road and Race Transmissions, who can give you some options to think about.
It ultimately depends how you want the car to drive, i.e. rate of progression of lock up on power, behaviour of the back end when off the power turning into corners, etc, etc.
Another good source of advice is Phil @ Road and Race Transmissions, who can give you some options to think about.
It ultimately depends how you want the car to drive, i.e. rate of progression of lock up on power, behaviour of the back end when off the power turning into corners, etc, etc.
Thank you, fergus.
I've decided to go for a Titan but I can't decide if I should go for carbon or sintered discs. I've been told that the carbon discs require more servicing as carbon residue must be removed when the discs wear. The question is if it's worth it or not?
(My half worn ZF lsd will be up for sale if anybody interested. Please PM me.)
I've decided to go for a Titan but I can't decide if I should go for carbon or sintered discs. I've been told that the carbon discs require more servicing as carbon residue must be removed when the discs wear. The question is if it's worth it or not?
(My half worn ZF lsd will be up for sale if anybody interested. Please PM me.)
nicemd said:
Thank you, fergus.
I've decided to go for a Titan but I can't decide if I should go for carbon or sintered discs. I've been told that the carbon discs require more servicing as carbon residue must be removed when the discs wear. The question is if it's worth it or not?
If you are minded to change out your diff oil regularly, and use what Titan specify, this should ensure that you have minimal additional wear from the "paste" created by the plates. I've decided to go for a Titan but I can't decide if I should go for carbon or sintered discs. I've been told that the carbon discs require more servicing as carbon residue must be removed when the discs wear. The question is if it's worth it or not?
They are probably best placed to comment on the effect of wear on preload on the clutch pack. I wouldn't imagine it will be that noticeable in terms of affecting the breakaway torque too much though, perhaps in the order of magnitude 5 lbs ft between a new set of plates and ones nearing the end of their life (this is a guess). Anything much more than this, and you'd have to questions the choice of material or the bonding techniques used I think.
Also worth asking about the size of the ramp crosspins, as these can add a lot to the strength of the diff.
In terms of ramp angles, see whether you can get a diff supplied with two different sets of ramp angles machined onto opposing sides of each cup. It's then easy to change the behaviour with a single swap (i.e. reverse the cups), rather than needing new cups....
Edited by fergus on Wednesday 4th November 13:53
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