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130 SharesAnyone that has ever owned a vehicle with a manual transmission has probably had to have the clutch replaced at some point. Depending on the vehicle, it will come equipped from the factory with a single mass flywheel (SMF) or dual mass flywheel (DMF). You will find that most of our beloved European cars came stock with a dual mass flywheel and for good reason. Below I will go through the concept, and why you would want to convert from one to the other.A dual mass flywheel is basically two flywheels with springs in the middle to act as a dampener. The two flywheel halves are able to move independently of each other within a limited range. The springs help absorb engine vibration which reduces wear on the transmission and the rest of the drivetrain. The benefits of a dual mass flywheel are smooth operation and dampening of noise, vibration, and harshness (NVH).
Cutaway of a Dual Mass FlywheelA single mass flywheel provides a direct contact between the engine and clutch assembly. Some clutch pressure plates contain springs to help dampen vibrations, but in general, an SMF cannot dampen engine vibration as well as a DMF. They tend to be much cheaper than a dual mass flywheel to replace, and because they are made of one piece they can also be resurfaced if within factory specifications. The construction of a single piece of metal gives it a greater heat capacity to prevent it from warping. It also allows the engine to rev quicker. This is ideal for track cars.As you may have gathered, the main downside in a DMF is cost, since the assembly is more complicated and must be replaced as a complete unit. This is because, unlike single mass conventional clutch and flywheel assemblies, you cannot resurface a dual mass flywheel when you do a clutch job.Conversion Kits.
Update Manager INSITE™ v7.6.0 or INSITE™ v7.6 SP1 must be installed before installing INSITE™ v7.6.1 Administrative rights are NOT needed to install INSITE™ v7.6.1 A new password will not be required if an active subscription to INSITE™ exists. Back to What’s New Agenda. So i'm in a bit of a pickle, the passenger window is down and won't go up either with the passenger switch, driver switch or via the keyfob. A VCDS scan tells me i've got an implausible signal - passenger door.
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One of our Valeo conversion kitsConverting from a dual mass flywheel to a single mass flywheel can be done on most vehicles if a kit is available. EEuroparts has a number of clutch conversion kits available from Valeo, an OE supplier to many luxury European car companies. If you want to convert your car from a dual mass to a conventional single mass flywheel clutch, and we don’t have a kit for you, let us know and we can help you source a high quality kit.The kits consist of a flywheel, clutch disc, and pressure plate. Most drivers will convert based on cost factors, while performance enthusiasts will convert to a single mass flywheel since it can handle increased engine torque and it gives direct feedback to the driver.To Switch or Not To SwitchThe time has come and your vehicle is in the shop for a clutch replacement. The mechanic says your dual mass flywheel needs replacement.
First of all it is recommended to replace the flywheel whenever replacing the clutch. Resurfacing a clutch can still leave hot spots on the flywheel that translates to jutter and vibration.
This is even more important on vehicles with a dual mass flywheel because they can fail and separate if overloaded which will damage the clutch.Keeping with a dual mass flywheel will keep the feel and drivability of the vehicle just as you’re used to. This is a great set up for driving on the street as it helps aid the driver’s comfort. When changing over to a single mass flywheel expect to experience a different feel of the clutch when engaging, increased shifts to keep the vehicle in motion in the low rpm range, and possibly gear rattle from the transmission. Is it most prevalent in first gear? A jutter is usually the result of hot spots on a friction surface (flywheel) where the metal is basically heat treated from being very very hot.
That causes uneven friction levels and generally a slight shudder when launching. When getting a flywheel resurfaced, the shop generally tries to cut deep enough to remove these spots, but because a dual mass flywheel can’t be resurfaced, it most likely will need a replacement. Try not to balance on the clutch at hill starts, and try to keep off the friction zone if possible in parking lots. Here is the flywheel for your car and the clutch kit is here, which includes everything you need including the hardware and slave cylinder. It’s not cheap but our new Affirm payment method can help soften the blow on a purchase like that.Your car is too new for an SMF conversion it seems, but I assume in the next 5 years an OE style (not sport or racing specialty style) will arrive on the market. Good luck, and thanks for shopping.
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The Sachs Performance pressure plate and friction disk is a great way to bridle the power of a tuned engine while maintaining the factory feel of the clutch with the DMF. What you’re looking for is pure friction increase to avoid slipping and that’s what this would do.
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Keep in mind if you really thrash on it you can risk breaking a spring and trashing the DMF regardless of how much friction it can produce. We are actually in the process of adding Sachs Performance products to our site so your comment was in good time!
I will edit this with a part number for future use when we add it.