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I see Eurocar Boutique is expecting the 9ff power kit to be available in mid sept., but does anyone know when they will have the 9ff LSD in stock? Also, I've read somewhere that it is a clutch type unit. Is this confirmed? How about cost?
LSD - Limited Slip Differential
A limited slip differential (LSD) is a modified or derived type of differential gear arrangement that allows for some difference in rotational velocity of the output shafts, but does not allow the difference in speed to increase beyond a preset amount. In an automobile, such limited slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity.
The main advantage of a limited slip differential is found by considering the case of a standard (or "open") differential where one wheel has no contact with the ground at all. In such a case, the contacting wheel will remain stationary, and the non-contacting wheel will rotate freely– the torque transmitted will be equal at both wheels, but will not exceed the threshold of torque needed to move the vehicle, thus the vehicle will remain stationary. In everyday use on typical roads, such a situation is very unlikely, and so a normal differential suffices. For more demanding use however, such as driving off-road, or for high performance vehicles, such a state of affairs is undesirable, and the LSD can be employed to deal with it. By limiting the velocity difference between a pair of driven wheels, useful torque can be transmitted as long as there is some friction available on at least one of the wheels.
To see the installation of a LSD style unit Click Here -> Article Forthcoming Stay Tuned
Sounds like a call to Eurocar Boutique is in order, or at least an email. Farnbacher-Loles (another site sponsor) also has LSD's available. I don't know the differences between the two.
LSD - Limited Slip Differential
A limited slip differential (LSD) is a modified or derived type of differential gear arrangement that allows for some difference in rotational velocity of the output shafts, but does not allow the difference in speed to increase beyond a preset amount. In an automobile, such limited slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity.
The main advantage of a limited slip differential is found by considering the case of a standard (or "open") differential where one wheel has no contact with the ground at all. In such a case, the contacting wheel will remain stationary, and the non-contacting wheel will rotate freely– the torque transmitted will be equal at both wheels, but will not exceed the threshold of torque needed to move the vehicle, thus the vehicle will remain stationary. In everyday use on typical roads, such a situation is very unlikely, and so a normal differential suffices. For more demanding use however, such as driving off-road, or for high performance vehicles, such a state of affairs is undesirable, and the LSD can be employed to deal with it. By limiting the velocity difference between a pair of driven wheels, useful torque can be transmitted as long as there is some friction available on at least one of the wheels.
To see the installation of a LSD style unit Click Here -> Article Forthcoming Stay Tuned
Farnbacher Loles
Farnbacher Loles launches Power Plus
Our exclusive new line of “Power Plus” kits will give you the extra performance you seek with the uncompromising quality and proven results that has made Farnbacher Loles the leader in Porsche performance.
I thought about calling or sending an email, but I was hoping that someone already knew or that ECB would respond so that the latest information could be shared with everyone.
I have sent Farnbacher-Loles an email asking about the LSD but they don't reply.
LSD - Limited Slip Differential
A limited slip differential (LSD) is a modified or derived type of differential gear arrangement that allows for some difference in rotational velocity of the output shafts, but does not allow the difference in speed to increase beyond a preset amount. In an automobile, such limited slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity.
The main advantage of a limited slip differential is found by considering the case of a standard (or "open") differential where one wheel has no contact with the ground at all. In such a case, the contacting wheel will remain stationary, and the non-contacting wheel will rotate freely– the torque transmitted will be equal at both wheels, but will not exceed the threshold of torque needed to move the vehicle, thus the vehicle will remain stationary. In everyday use on typical roads, such a situation is very unlikely, and so a normal differential suffices. For more demanding use however, such as driving off-road, or for high performance vehicles, such a state of affairs is undesirable, and the LSD can be employed to deal with it. By limiting the velocity difference between a pair of driven wheels, useful torque can be transmitted as long as there is some friction available on at least one of the wheels.
To see the installation of a LSD style unit Click Here -> Article Forthcoming Stay Tuned
Farnbacher Loles
Farnbacher Loles launches Power Plus
Our exclusive new line of “Power Plus” kits will give you the extra performance you seek with the uncompromising quality and proven results that has made Farnbacher Loles the leader in Porsche performance.
<p style="MARGIN-BOTTOM: 0pt">Here's the scoop.<o></o>[/quote]
<p style="MARGIN-BOTTOM: 0pt">9ff previously offered a Porsche motorsorts GT2- based LSD which was then modified to fit the Boxster (and Carrera). This unit retaled for $3300. Unfortunately, this unit does NOT fit in the Cayman....sigh.<o></o>[/quote]
<p style="MARGIN-BOTTOM: 0pt">So, 9ff designed their own LSD for the Cayman - which was integral in helping their 430HP CR42 fight off Porche's 997 GT3. I'm sure some of you have seen these resulst wherein the CR42 had a 1 sec lower lap time than the 997 GT3.<o></o>[/quote]
<p style="MARGIN-BOTTOM: 0pt">This LSD is now available for the demanding driver who needs maximum traction.<o></o>[/quote]
<p style="MARGIN-BOTTOM: 0pt">The price for a single unit however reflects the proprietary design and runs a wallet-draining $5200 (plus shipping). However, we at eurocar boutique anticipate the demand from Cayman drivers who are unsatisfied to pegleg around the track. We can offer the unit for $3500 but it entails an order of TEN units. We are willing to do this – but it would be helpful to get 5 drivers in a group buy to make this happen.<o></o>[/quote]
<p style="MARGIN-BOTTOM: 0pt">So who is interested? <o></o>[/quote]
<p style="MARGIN-BOTTOM: 0pt">We have 10 cayman powerkits and two 4.1L engines inbound this month. It would be great to ship it all together if possible, but the real issue is demand. Does anybody want one? The line forms at the left.<o></o>[/quote]
BTW – the standard setting is 25/40 acell/decel, but it can be set up to 60/80.[/quote]
A limited slip differential (LSD) is a modified or derived type of differential gear arrangement that allows for some difference in rotational velocity of the output shafts, but does not allow the difference in speed to increase beyond a preset amount. In an automobile, such limited slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity.
The main advantage of a limited slip differential is found by considering the case of a standard (or "open") differential where one wheel has no contact with the ground at all. In such a case, the contacting wheel will remain stationary, and the non-contacting wheel will rotate freely– the torque transmitted will be equal at both wheels, but will not exceed the threshold of torque needed to move the vehicle, thus the vehicle will remain stationary. In everyday use on typical roads, such a situation is very unlikely, and so a normal differential suffices. For more demanding use however, such as driving off-road, or for high performance vehicles, such a state of affairs is undesirable, and the LSD can be employed to deal with it. By limiting the velocity difference between a pair of driven wheels, useful torque can be transmitted as long as there is some friction available on at least one of the wheels.
To see the installation of a LSD style unit Click Here -> Article Forthcoming Stay Tuned
I have sent Farnbacher-Loles an email asking about the LSD but they don't reply.
They are probably busy prepping cup cars, which is a big part of their business. try calling 203-798-2929. Ask for Spencer or Kip. They are both very knowledgeable.
Why is there more lock up when decelerating? I would think the other way around would be more forgiving.
There is lock up on both accel and decel. You want the differential to lock on deceleration to prevent the tail from squirming under hard braking. You would notice it mostly at the end of a long straight where it is bumpy in the braking zone (e.g. Lime Rock Park).
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