I just read through the entirety of BADNEW5's 700awhp or bust thread, and watched the two videos right at the end of his grenaded center diff.
I spend most of my time doing 4x4 and offroad type stuff, so when I saw the vid of his diff (I've not yet been that far in to my SV25) I realized something...
The machinework for a helical LSD would be damn near impossible. A clutch type LSD is rumored to be available through Australia but that's some serious money... I don't think anyone has thought of a ratchet-type LSD.
They're most commonly used in 4x4 stuff, as under power they are a positive-engagement spool and when coasting they disengage and ratchet (hence the name) and allow the two sides of a differential to rotate in opposite directions or at different speeds. Basically exactly what we want; the VCU makes up for that little bit of slip we would need when turning under power, so our ideal arrangement is positive engagement between the transmission and the VCU under power.
I don't know how many of you have seen what a ratcheting LSD looks like, but they're very simple. They are usually composed of two high-grade steel slugs that replace the spider gears in a differential and they have little nubs that engage the side gears. When I saw the vid BADNEW5 posted, I instantly recognized the guts of a standard open differential.
If we could find a company that could machine just those two center pieces (I forget off the top of my head what they're called) to replace the spider gears, we could effectively have an LSD center diff with a very simple - and stout - package.
BADNEW5's videos:
http://www.youtube.com/watch?v=UwFToHUCFZ8
http://www.youtube.com/watch?v=UWXdrpdJA6U
Standard Detroit EZ Locker (with epic Paint text pointing out the engagement method/function of parts)
Credit goes to Detroit for unmodified pic.
I know this will probably get torn to pieces, but all of the potential group buy threads I've seen were for far more complicated LSD setups. The ratcheting locker is a very simple way to get a basic LSD. I'm posting this in the general chit chat forum just to get the idea out there, not because I think everyone will jump on the wagon.
I'm not sure what it would take to machine a simple set just for testing purposes (the real deal is a hunk o' forged steel, very pricey initial setup) but I don't think it would be that bad. The advantage to these is that they *only* replace the spider gears (the tiny ones that ride on the round bars you can see in BADNEW5's videos) and utilize the stock crosspins (there are five in a 'Trac center diff) for engagement.
I spend most of my time doing 4x4 and offroad type stuff, so when I saw the vid of his diff (I've not yet been that far in to my SV25) I realized something...
The machinework for a helical LSD would be damn near impossible. A clutch type LSD is rumored to be available through Australia but that's some serious money... I don't think anyone has thought of a ratchet-type LSD.
They're most commonly used in 4x4 stuff, as under power they are a positive-engagement spool and when coasting they disengage and ratchet (hence the name) and allow the two sides of a differential to rotate in opposite directions or at different speeds. Basically exactly what we want; the VCU makes up for that little bit of slip we would need when turning under power, so our ideal arrangement is positive engagement between the transmission and the VCU under power.
I don't know how many of you have seen what a ratcheting LSD looks like, but they're very simple. They are usually composed of two high-grade steel slugs that replace the spider gears in a differential and they have little nubs that engage the side gears. When I saw the vid BADNEW5 posted, I instantly recognized the guts of a standard open differential.
If we could find a company that could machine just those two center pieces (I forget off the top of my head what they're called) to replace the spider gears, we could effectively have an LSD center diff with a very simple - and stout - package.
BADNEW5's videos:
http://www.youtube.com/watch?v=UwFToHUCFZ8
http://www.youtube.com/watch?v=UWXdrpdJA6U
Standard Detroit EZ Locker (with epic Paint text pointing out the engagement method/function of parts)
Credit goes to Detroit for unmodified pic.
I know this will probably get torn to pieces, but all of the potential group buy threads I've seen were for far more complicated LSD setups. The ratcheting locker is a very simple way to get a basic LSD. I'm posting this in the general chit chat forum just to get the idea out there, not because I think everyone will jump on the wagon.
I'm not sure what it would take to machine a simple set just for testing purposes (the real deal is a hunk o' forged steel, very pricey initial setup) but I don't think it would be that bad. The advantage to these is that they *only* replace the spider gears (the tiny ones that ride on the round bars you can see in BADNEW5's videos) and utilize the stock crosspins (there are five in a 'Trac center diff) for engagement.