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Cayman ComparisonsThis sub forum is for messages specifically about comparing the Cayman to other cars. For example how the Cayman compares to the 350Z or S2000 or SLK, etc.
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It does not have an LSD; it has an software program that imitates one -- applying braking to the appropriate rear wheel...
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
The real consideration (for me, at least) would be to upgrade the ECU of the 135i through a Dinan-authorized BMW dealer (such as mine). My wife took our BMW in for service a few weeks ago and spoke to our salesman about the 135i on my behalf. He suggested a 135i with the Dinan software upgrade ($1900), which does not alter the warranty of the vehicle (if done by an authorized dealer). The result:
1. BMW 135i (well-optioned) -> $41,000 - $1500 (discount from dealer) = $39,500
2. Dinan upgrade = $1900
3. Total = $41,400 (plus tax, etc.) and 385 HP and 420 lb/ft of torque!
He suggested a 135i with the Dinan software upgrade ($1900), which does not alter the warranty of the vehicle (if done by an authorized dealer).
You might want to read the fine print there. Dinan warrants its parts. If your Dinan part causes, for example, brakes to fail because you have more HP than the car was designed for, I doubt Dinan is going to cover the brakes. Nor will BMWUSA, most likely, cover them either as the damage was caused by an aftermarket part.
Further, look carefully at the BMW dealers. Not all BMW dealers are Dinan dealers and if you break down and no Dinan dealer around, the other BMW dealers may not touch your car. After all, they are not a Dinan dealer for one reason or the other.
Just something to think about. There are no free rides
You might want to read the fine print there. Dinan warrants its parts. If your Dinan part causes, for example, brakes to fail because you have more HP than the car was designed for, I doubt Dinan is going to cover the brakes. Nor will BMWUSA, most likely, cover them either as the damage was caused by an aftermarket part.
Further, look carefully at the BMW dealers. Not all BMW dealers are Dinan dealers and if you break down and no Dinan dealer around, the other BMW dealers may not touch your car. After all, they are not a Dinan dealer for one reason or the other.
Just something to think about. There are no free rides
That still doesn't discount the fact you can have a BMW 135i w/stage2 Dinan kit offering; 404HP / 453TQ (crank), weighing in at 3200lbs, with a comendable suspension tune........ for the Price of a Cayman S!
Obviously, the CS has a handling advantage, but as we just saw... you cannot hold your head to high, this is a BMW with a moonroof that just equaled a Cayman in handling. But let not us also forget, OMG... a 404HP spartan bimmer..??
This car is a winner! Hopefully I'll own both someday!
That still doesn't discount the fact you can have a BMW 135i w/stage2 Dinan kit offering; 404HP / 453TQ (crank), weighing in at 3200lbs, with a comendable suspension tune........ for the Price of a Cayman S!
That is not my point.
In case you missed it, the point is that BMW does not cover the Dinan parts but rather Dinan does. If a Dinan part causes problems, then I wouldn't hold my breath that BMWUSA covers it. Dinan is still aftermarket.
Not all BMW dealers are Dinan dealers. Many are not and that is another issue.
In case you missed it, the point is that BMW does not cover the Dinan parts but rather Dinan does. If a Dinan part causes problems, then I wouldn't hold my breath that BMWUSA covers it. Dinan is still aftermarket.
Not all BMW dealers are Dinan dealers. Many are not and that is another issue.
Oh, I guess you missed my point. The Dinan upgrade was ancillary to my argument. The 135i doesn't need a Dinan stage to beat/match the Cayman S, either....! So why not make it more obscene by spending that saved $7k on Dinan mods. You can't touch that.... a freaking GT entering the Sports-car arena...???
Need I mention a Cayman is a mid-engine flat-6, cult status Porsche, that is universally heralded as one of the greatest handling cars ever made...
...then have it stagnate and usurped by vanguard engineering from BMW. Simply put, Porsche hit an engineering wall or devoted too much of their resources into the Panamera. Encroaching on Audi, MB and BMW territory..?
Your point on warranty is moot. It doesn't matter that on rare occasions, Dinan will void their 4 year warranty on their aftermarket parts.... its that you already saved $17k in not buying a Cayman S and can have a 404HP BMW that gets 30mpg and tears it up on the track.
Still wouldn't buy a BMW over a Porsche. Lest we forget, according to the recent Top Gear magazine, the CS spanked even the BMW M3 on the track. Must have something going for it. And for around 10 grand, you can turbocharge the CS and have 425 RWHP. We will see as time passes which is best remembered. The Audi R8, with all it's hype, already seems to be all but forgotten. I've been reading this same stuff for about 40 years now, about the newest sports car that was sure to kick Porsche's rear end, but still Porsche hangs in there and survives. I've seen Porsche at death's door at least twice. Look at the power house it has now become, with the resources of Europe's largest automobile manufacturer at it's disposal. Who knows what it will become. If they make VW as efficient as they have become, look out Toyota.
One more thing. You can take a Subaru and make it accelerate like a Ferrari 599. I know that this would not change my mind about purchasing a 599. That is, if I could afford one. Unfortunately, the CS will continue to be grossly handicapped as long as the 911 is around, as a previous poster pointed out. And I suppose that the 911 and Cayman will be ignored a little until the Panamera is fully developed. Who can blame Porsche for building the Panamera. Look at the money the Cayenne made them. It is a business after all, with profit being the bottom line. If folks were so upset with the products that Porsche are selling these days, they can vote with their right foot and buy something else. But that is definitely not happening.
its that you already saved $17k in not buying a Cayman S and can have a 404HP BMW that gets 30mpg and tears it up on the track.
I was responding to uboatcommander bringing up warranty information.
You responded about something else. I tried to clarify I was only talking about potential problems with aftermarket warranties. Nothing more.
I, for one, could care less a BMW costs umpteen thousand dollars less and goes 0 - 60 in 2.8 seconds and top speed of 412 mph. I was talking aftermarket warranties, not arguing if one car was faster than another, their relative costs, or whatever.
Interesting: I was in the US when this was on and missed it; just caught it on YouTube.
I looked at a then top of the range 1 series before I chose the Cayman 2.7. In 130i M Sport form it was still quicker than the Cayman, but the combination of 18" wheels, run flat tyres and M Sport suspension produced an atrocious ride on UK roads. I mean you started to try and steer around anything bigger than a 50p piece to save further damage to your spine, and fast 'B' road stuff was limited by the wheels spending more time in the air than on the tarmac. The PASM Cayman is sublime in comparison.
Either BMW have massively imprived their suspension or running this 'test' on Silverstone's
smooth tarmac has negated the effect of the Porsche's chassis superiority.
SS7
PASM - Porsche Active Suspension Management
This active damping system offers continuous adjustment of individual damping forces based on current road conditions and driving style.
The driver can choose from two setup modes, ‘Normal’ and ‘Sport’, using a separate ‘damper’ button on the center console. ‘Normal’ mode is designed for general road driving and circuits with uneven tarmac. ‘Sport’ mode is intended for smoother track surfaces, where the harder settings help eliminate pitch and roll.
In either mode, PASM continuously evaluates the current conditions while automatically selecting the corresponding damper rates from the respective set of mapped values.
A range of sensors are used to monitor the movement of the body under acceleration, braking and cornering maneuvers, as well as on poor road surfaces. The PASM control unit then evaluates this data and modifies the damping force on each individual wheel in accordance with the selected mode. The result is a significant reduction in body movement as well as a better grip on the road.
For example: if ‘Sport’ mode is selected, the suspension is automatically set to a harder damper rating. If the quality of the track surface falls below a certain threshold, the system immediately changes to a softer rating within the ‘Sport’ setup range. When the quality of the tarmac improves once more, PASM automatically returns to the original, harder rating.
Need more information about PASM? Click this link: FAQ for PASM
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Carrara white pauper's 2.7
Snickers wrapper in the door bin
Flies on the number plate
Church's scuffs on the kickplate
'Goodwood' umbrella in the back
I was responding to uboatcommander bringing up warranty information.
You responded about something else. I tried to clarify I was only talking about potential problems with aftermarket warranties. Nothing more.
I, for one, could care less a BMW costs umpteen thousand dollars less and goes 0 - 60 in 2.8 seconds and top speed of 412 mph. I was talking aftermarket warranties, not arguing if one car was faster than another, their relative costs, or whatever.
I guess you not getting the overall picture. Voiding of the Dinan warranty is only a potential problem if you mess with Dinan's warranty rules. It has happened but very rare... so lets endlessly talk about something that might happen given enough fault on the owner.
You can also void your Porsche's warranty if you do something stupid aswell...
I was responding to uboatcommander bringing up warranty information. 
