Lightweight single-mass flywheel for 987.1
- Thread starter tcreswick
- Start date
Brian_Innes
Member
If I were modding a 987 Cayman I would definitely do this. The OE dual mass flywheel is a nothing but a pain for modifiers who intend to track their cars, or partake in competitive motorsport. The dual mass flywheel is a myriad of negatives, it's delicate, makes blitz standing starts risky, is heavy, complicated, and liable to shear unexpectedly. When first installed by Porsche in 911's, the dual mass flywheel caused all sorts of problems. It's fine for normal touring use and isolating the vibrations and clutch pedal loads for the driver. I know they are standard everywhere now but I still don't like them.
I wouldn't worry too much about reports of torsional vibrations on the crankshaft. Just do it and enjoy the free revving, responsiveness of a lightweight flywheel. The idling lumpiness is also a minor issue.
If you do decide to go ahead with this, another mod I would do on a 987 Cayman for track day use, is to beef up the engine and transmission mountings. They are weak on the 987 Cayman and not up to competition use. The front engine mount particularly is a hollow rubber affair with all the robustness of a fruit pastille. It causes judder and axle tramp on blitz starts off the line. You'll break something eventually. If you are not intending doing road touring with your car, fit the black insert version, which is the strongest one, to the front engine mount together with the lightweight flywheel and your 987 will be transformed. Helps the feel of gear changes on the manual too I understand.
Brian
I wouldn't worry too much about reports of torsional vibrations on the crankshaft. Just do it and enjoy the free revving, responsiveness of a lightweight flywheel. The idling lumpiness is also a minor issue.
If you do decide to go ahead with this, another mod I would do on a 987 Cayman for track day use, is to beef up the engine and transmission mountings. They are weak on the 987 Cayman and not up to competition use. The front engine mount particularly is a hollow rubber affair with all the robustness of a fruit pastille. It causes judder and axle tramp on blitz starts off the line. You'll break something eventually. If you are not intending doing road touring with your car, fit the black insert version, which is the strongest one, to the front engine mount together with the lightweight flywheel and your 987 will be transformed. Helps the feel of gear changes on the manual too I understand.
Brian
Thanks Brian that's helpful. My car is quite well set up for track work but the DMF has been bothering me for some time. I'm not too fussed about blistering standing starts, but you certainly can feel the DMF and engine mounts on the occasional quick getaway.
I'm curious if you'd leave the stock clutch plate or go with the sachs sprung plate - that seems to be the compromise that some people have opted for.
I'm curious if you'd leave the stock clutch plate or go with the sachs sprung plate - that seems to be the compromise that some people have opted for.
Brian_Innes
Member
If it were me, I would go for the Sachs clutch plate.
Rationale being that you may as well upgrade everything you can on the same job while you are in there.
Brian
Rationale being that you may as well upgrade everything you can on the same job while you are in there.
Brian
Hi Brian,
I'm looking at getting this done next week but haven't been able to source the sprung clutch plate. I was looking at this thread as the reference https://rennlist.com/forums/987-981-forum/957212-porsche-987-cayman-s-sport-clutch-and-single-mass-flywheel-package-install.html but can't seem to track down a UK supplier.
Can anyone point me in the right direction?
Tim
I'm looking at getting this done next week but haven't been able to source the sprung clutch plate. I was looking at this thread as the reference https://rennlist.com/forums/987-981-forum/957212-porsche-987-cayman-s-sport-clutch-and-single-mass-flywheel-package-install.html but can't seem to track down a UK supplier.
Can anyone point me in the right direction?
Tim
Brian_Innes
Member
Tim,
Have you checked-out RPM-Technik? www.rpmtechnik.co.uk
They do single-mass lightweight flywheel packages for CSR versions of the Cayman. They used to sell a 987 CS version of the CSR.
Maybe worth checking with them.
Brian
Have you checked-out RPM-Technik? www.rpmtechnik.co.uk
They do single-mass lightweight flywheel packages for CSR versions of the Cayman. They used to sell a 987 CS version of the CSR.
Maybe worth checking with them.
Brian
Hi Brian that's helpful thanks.
Looks like they do have it here https://rpmtechnik.co.uk/shop-product/csr-lightweight-flywheel/ - any idea how that flywheel compares to the Aasco?
Looks like they do have it here https://rpmtechnik.co.uk/shop-product/csr-lightweight-flywheel/ - any idea how that flywheel compares to the Aasco?
Brian_Innes
Member
Tim,
No idea, sorry.
RPM Technik have long experience with lightweight flywheels on Caymans so I'd go along with what they recommend.
The Cayman Owners Club had an open day at their premises last January. Maybe worth checking CoC website for any relevant info.
Brian
No idea, sorry.
RPM Technik have long experience with lightweight flywheels on Caymans so I'd go along with what they recommend.
The Cayman Owners Club had an open day at their premises last January. Maybe worth checking CoC website for any relevant info.
Brian
Resurrecting this thread again as I've finally sourced all the flywheel and clutch parts (happy to share).
I want to get the engine and gearbox mounts done at the same time, but I'm having trouble getting a recommendation for semi-solid mounts for a 987 and where to buy them.
Can anyone make a recommendation?
I want to get the engine and gearbox mounts done at the same time, but I'm having trouble getting a recommendation for semi-solid mounts for a 987 and where to buy them.
Can anyone make a recommendation?
https://www.wevo.com/Products/ChassisProducts/WevoChassisProducts-BoxsterSSEngineMounts.htmtcreswick said:
https://rennpart.com/product/wevo-semi-solid-transmission-mounts-986987/
http://www.tarett.com/items/986-987-981-products/986-987-981-engine~trans~brakes~electrical/semi-solid-987-986-eng-mount-detail.htm
http://www.design911.co.uk/fu/pt856_864_-cma81-cmo82/Porsche/Boxster-986-987-981/Engine-Mounts/
http://www.planet-9.com/987-cayman-and-boxster-competition/86380-wevo-motor-mount-transmission-mounts-your-experience.html
Hope these are of some use.
Ray
Thanks Ray, although I'm aware that Design 911 have the transmission mounts, but the only (front) engine mount they have is the OEM part. Having spoken to them, they don't have a semi-solid front mount.
The first Wevo mount you've linked is (I think) for the wrong generation so not a direct replacement for the 987. Regardless, I was ideally looking for a UK/EU source rather than importing from the US. Obviously I can do the latter, just hoped there might be someone in the UK stocking these parts given that it's a pretty common upgrade.
The first Wevo mount you've linked is (I think) for the wrong generation so not a direct replacement for the 987. Regardless, I was ideally looking for a UK/EU source rather than importing from the US. Obviously I can do the latter, just hoped there might be someone in the UK stocking these parts given that it's a pretty common upgrade.
crafty72
New member
tcreswick said:
I recently installed this engine mount in my car (yellow) and their semi-semi solid gearbox mounts, apart from some added NVH around 2,000 rpm I am very happy with them.
http://www.function-first...ns/engine-mount-insert
I have a couple of the RSS transmission mounts that I had on my Cayman R for around 3000 miles. You are welcome to try them and send a few beer tokens if they Are satisfactory. The shafts were shortened to fit the Cayman installation and they did a great job tightening everything up. Pm me if interested.tcreswick said:
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