Maybe the guys that have 190 cossies could chime in.
I have been looking for a god LSD for my e30 and not doing too well finding one.
A couple days ago I was talking to a friend about my Mercedes C280 (w202), which has this awesome thing called ASD. Back before I bought the e30, when I wanted to rebuild the Mercedes into a track car, differential modification was one of only a few possibilities. Aftermarket parts are scarce. True LSD's were only put into a few cars.
ASD is an Automatic (Limited) Slip Differential. When the system is off, they are said to have anywhere between 15-35% limit, depending on how old it is and probably engine dependant. Later cars also had ASR, but let's not get into that.
When a wheel slips on ice for example, the ABS sensors sends a signal to the ECU, which then activates a solenoid pressurising the differential. Cylinders inside press on clutches (note: wayd old ASD's probably only had one clutch). How it decides how much pressure should be sent, I don't know, probably spin speed difference, overall car speed etc. but this system is said to provide up to 100% hydraulically driven lock.
The bad thing about ASD is that is takes a couple seconds, then you feel a kick, and get out of whatever situation you're in. The lag is useless for any race-ish application. Also the system is supposed to work only up to 30mph. It is a very complicated system and swaping into a non-ASD car is said to be almost impossible.
But the most awesome thing about the ASD is that it can be made into a standalone hydraulic differential. Basically, you take a small master brake (from a gokart I read somewhere), put a lever pump in the interior, a solenoid connected to an inside buttom for pressure release (no lock - prolongs the life of various parts) and a ball check valve along the lines to hold the pressure you've pumped. Ie. 4 lever pumps = 100% lock, 2 pumps = approx. 50%. You set it for your needs and leave it until you don't need LSD anymore, press the pressure release button and go home.
Yes, like Reebok Pumps.
The sad part is that most of the diff ratios are under 3.0.
So do you guys think this is something worth looking into, somehow fabing it into gods chariot?
I can't really imagine a better differential lock-wise for the price. You should be able to get a good ASD for a couple hundred and there was plenty of them in tthe 90's cars.
I have been looking for a god LSD for my e30 and not doing too well finding one.
A couple days ago I was talking to a friend about my Mercedes C280 (w202), which has this awesome thing called ASD. Back before I bought the e30, when I wanted to rebuild the Mercedes into a track car, differential modification was one of only a few possibilities. Aftermarket parts are scarce. True LSD's were only put into a few cars.
ASD is an Automatic (Limited) Slip Differential. When the system is off, they are said to have anywhere between 15-35% limit, depending on how old it is and probably engine dependant. Later cars also had ASR, but let's not get into that.
When a wheel slips on ice for example, the ABS sensors sends a signal to the ECU, which then activates a solenoid pressurising the differential. Cylinders inside press on clutches (note: wayd old ASD's probably only had one clutch). How it decides how much pressure should be sent, I don't know, probably spin speed difference, overall car speed etc. but this system is said to provide up to 100% hydraulically driven lock.
The bad thing about ASD is that is takes a couple seconds, then you feel a kick, and get out of whatever situation you're in. The lag is useless for any race-ish application. Also the system is supposed to work only up to 30mph. It is a very complicated system and swaping into a non-ASD car is said to be almost impossible.
But the most awesome thing about the ASD is that it can be made into a standalone hydraulic differential. Basically, you take a small master brake (from a gokart I read somewhere), put a lever pump in the interior, a solenoid connected to an inside buttom for pressure release (no lock - prolongs the life of various parts) and a ball check valve along the lines to hold the pressure you've pumped. Ie. 4 lever pumps = 100% lock, 2 pumps = approx. 50%. You set it for your needs and leave it until you don't need LSD anymore, press the pressure release button and go home.
Yes, like Reebok Pumps.
The sad part is that most of the diff ratios are under 3.0.
So do you guys think this is something worth looking into, somehow fabing it into gods chariot?
I can't really imagine a better differential lock-wise for the price. You should be able to get a good ASD for a couple hundred and there was plenty of them in tthe 90's cars.
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