First off, im comming from a former auto es, now I have a 5speed ralli-art and im wondering what is a LSD, and what will it do if the ralli-art came with one.?

 

LSD is a limited slip differential. It engages when one tire is slipping, it transfers the power away from that tire to the other tire to get it to engage faster. Basically it helps transfer the power to the ground more because as soon as one wheel starts slipping (essentially losing power) it transfers more power to the wheel that is not slipping.

 

limited slip differential. Read the docs about it on howstuffworks.com for a good intro. Anyway, what it does is proportions power to the wheels that have more traction.

IE: In a RA, 2 wheels get power. If you are cornering, the inside wheel has alot more pressure than the outside wheel. Therefore, the it should get more power. The LDS lets this happen.

Also helps launches and will really help your 1/4 times. will reduce wheel spin any time it happens

 

If you put an LSD in your RA (such as the one that RRM sells) you'd see improved launches, which is better for drags, but your cornering ability would suffer as it would be more difficult for the wheels to move at different speeds. I'm not sure how much it would suffer, though.

 

i disagree wuth the turning statement. The EVO RS has a front LSD and has no problems. What must be differed here is the type of LSD used. That will effect turning and dragging. Just depends what you want your car to do best.

 

it only affects turning at slow speeds...ie. turning from a stop. But its main purpose is to help acceleration/grip to the wheels when launching and turning under acceleration.

 

LSD?

 

dose the RA have a LSD? i dont own a RA so i dont know?

 

nope, the RA does not have a LSD.

 

What kind of system do we have? I think I read somewhere that we have an "open" system. What does that mean?

 

Open differential.. It means that if you hit it a certian way you can sit and spin one tire and the other won't even move. This usually happens when you have a tire with a lot less traction than the other ether from water or oil or situations as such.

 

An "open" type differential consists of a set of spider gears that rotate around one another. Under normal conditions, the load on both drive wheels is near-equal, so power is transfered normally to both wheels. Under hard cornering and or acceleration, the spider gears will rotate around one another, and the power transfered from the engine will take the path of least resistance - in this case the tire that is already loose and spinning. The purpose of an LSD is to "lock up" the spinning wheel to the wheel that has more grip, thus putting the maximum amount of power down to the ground, rather than spewing it up into the air with burnt rubber particles.

 

Thanks quantum & turbonutter, so we lose rubber either 'cause the wheel spins in turns, or get a LSD and lose less rubber with faster exit speeds. Tough choice

 

check RoadRace Motor Sports for LSD's.
They've got two types. A clutch type and.... the other type that lasts longer.

There's a big price difference between the two. I'm wondering if maybe I should go clutch type and replace it after... what is it... 100,000 miles?

 

An open differential allows the front wheels to turn at different speeds in a turn. The inside wheel turns slower than the outside wheel. A limited slip differential still allows this to happen the same as an open differential, however if one wheel is turning MUCH faster than the other, either a clutch or a viscous fluid will transfer power to the other wheel.