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YOUR RESEARCHHard rubber vs standard motor mounts
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Install track wheels and tires
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I did install a light weight flywheel and sport clutch at the same time, as well as a second gear detent mod, and I installed my track wheels and tires, so all in all the whole package feels razor sharp, but NVH is simply not an issue.
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I suspect used Wevos would sell easier, due to the repalceable pillow, than used RS mouns, but I may be wrong.
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Thankx guys, looks like Porsche Rs mounts are the way to go...I will check into this in the very near future.
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And, while I'm at it, I might try to fill the voids in the 2 engine mounts to stiffen them up.
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I did install a light weight flywheel and sport clutch at the same time, as well as a second gear detent mod, and I installed my track wheels and tires, so all in all the whole package feels razor sharp, but NVH is simply not an issue.
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Suggestion
I raced my 996 for two years on stock mounts, and it wasn't until I was pushing the car REALLY hard (like running 1:56's that the need for the RS mounts came into play.
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Since I lowered my C2 with PSS9s, I was thinking of installing the "Hard Rubber" motor mounts as shown by deutschepartsusa on ebay, on "sale" this week. Are these the same as RS mounts anyone know? Or a different one altogether. I know they are not the same same as the OEs but others have given them high marks for quality. They do not look like the ones that Gert sells. Are the standard OE's oil filled?
The OE's are oil filled. I just blew one out jacking up the car- it is a little scary to see oil streaming out from under the car! I too am thinking about solid rubber mounts as I think it will stiffen my cab's chassis up a tiny bit.
I have RS mounts. The stiffer mounts help a lot when the car is being pushed. The car feels like its really screwed together. No flexing of the motor when on brakes or gas. A worthwhile mod if you are tracking your car. Shifting accuracy may improve a small amount as well. (Ive had mine for a couple years now so I dont really remember how the shifts felt before)
I am installing my RS motor mounts as early as this weekend. $400 from suncoast, which includes a bagfull of mounting hardware.
You don't say what the price is on the fleabay parts but if the savings are less than $200 then I would just go with the factory stuff. It will last ten years or more so amortized over time the savings won't buy a case of beer per year. At least not where I live.
As far as impressions go - I'm doing a liteweight flywhee, sport clutch and 2nd gear detent at the same time, so the car is going to feel very different all around and I'll be hard pressed to attribute any one sensation with any one mod...at least at first.
I've heard only good things about the RS mounts, and now that I have them in my hand I can see they are very similar to the RS mounts I installed in my 911 many years ago...and I liked those a lot., so I'm pretty stoked.
This DIY transmission mod seems worthwhile - check it out.
http://www.6speedonline.com/forums/9...-urethane.html
I plan to do the same. 3M Window Weld costs $25. And, while I'm at it, I might try to fill the voids in the 2 engine mounts to stiffen them up. If the results are similar, I've saved myself $375 vs the RS mounts.
That procedure is not even a bit transferable to a hydraulic motor mount, the GT3 trans mount is totally (totally) different than a 996 motor mount. Chalk and Cheese.
But besides that...it's a ghetto fix man. Like we're in Cuba or something.
Whatev though - give it a shot. My guess is you'll make a mess and spend $25 doing it....and you still won't have a working motor mount.
Here is a good read about eBay motor mounts...https://rennlist.com/forums/996-forum/636542-look-what-happened-to-my-engine-motor-mount.html
This is probably not the best place to skimp.
This ^^^ If you're not tracking the car, I'd stick with the stock mounts, or at least not change them out till you have a mount fail. I raced my 996 for two years on stock mounts, and it wasn't until I was pushing the car REALLY hard (like running 1:56's that the need for the RS mounts came into play.
The stock TT mounts aren't much, if any, stiffer than the standard mounts. I believe the mounts that come with the X73 suspension are the RS mounts. If so, that is the way to go for a street car that occasionally sees the track.
I installed them a couple of weeks before the rest of the suspension went on and they made a big improvement.
They even tighten up the handling on a cab.
Hmmm, so for someone who does track his car the RS mounts sound like a very good thing....interesting. Difficulty of the install???? Approximate expense one should expect to see, anyone, if you have an indie shop do the work? And, while I get the idea that the car will feel tighter, more screwed together, less shifting of weight transfer?????? Any idea as to whether this will actually shave time off a lap (Pete?), or is it simply a feel thing? Thank, in advance.
The mounts are rather easy to install. You need to support the engine and swap them one at a time. An indy can do this in an hours time. However if you like to wrench then you can DIY.
The only way the mounts will improve a lap time is by giving you more confidence due to the improved feel of the chassis. The factory mounts allow a lot of flexing and this becomes very apparent on the track. The motor will be planted in the rear which gives the feeling that the car is one solid unit. To me, it actually felt like the suspension was stiffened since the motor is not able to twist around. You will notice a difference over bumps as well...again no flexing. There is a very distinct difference between RS and factory mounts.
My original motor mounts are 10 years old, and though still intact, I also feel they are way too flexy now that I have the PSS9s on, with bigger ARBs. As long as the inner car vibration is not increased significantly, I'd like the motor to rotate less on the mounts & give a more solid feel. Deciding on just new standard, TTs, or RS mounts..
I did mine in about 30 minutes and I had never done it before. Really easy DIY. All you need is a floor jack to support the motor while you make the change, and a 16" or longer extension for your socket wrench to reach the nut on the bottom. You go up from underneath between the bumper and exhaust.
There are a number of DIY's on Renntech and 6speed.
I agree with the "solid" comments. I also think the gear shifting is better for some reason. I had a SSK prior to adding the mounts and I can feel the gear better. There is a little more vibration inside the car too. I would say it helps in lap times but it's splitting hairs....but it is a confidence builder which lets push harder.
There are threads floating around which discuss this, and my take-away was that the RS mounts are the best combination of stiffness and vibration damping.
Rennline are solid methinks, and its agreed that solid mounts transmit way too much vibration through the car, even to the point of jeapordizing the electronics.
WEVO makes a semi-solid, but the price isn't that much better than the Porsche parts, and you know Porsche (which employs some of the best engineers in the world and has 2/3 of a century of very successful racing experience) makes a good semi-solid motor mount.
What's it called again.....? Oh yeah - RS motor mounts!
Well, I *just* finished installing a set of the RS motor mounts, and by just I mean a few hours ago, and I can report that the increase in NVH (noise vibration harshness) is barely noticeable, at least to me.
I did install a light weight flywheel and sport clutch at the same time, as well as a second gear detent mod, and I installed my track wheels and tires, so all in all the whole package feels razor sharp, but NVH is simply not an issue.
Highly recommended. $400 at Suncoast.
Interesting. I bought some TT mounts and installed them but I didn't notice any size difference and the ride didn't seem all that different either.
I'm wondering if I actually got TT mounts(had no reason to doubt the seller). hmmm....
Also read conflicting info on whether TT mounts are solid or fluid filled...
You see, that's my point. The WEVO mounts are exaclly the same price as Porsche RS mounts.
Nothing against the WEVO mounts, but why wouldn't you buy the Porsche part instead?
based on recommendation from several people i know. WEVO mounts seem to be better - they transfer less vibrations at idle and they do not fail. nothing against RS mounts, as well. i was only against using liquid glass in the stock mounts instead of oil, it sounds a bit extreme.
Also, the Wevos have individually repalceable pillows, don't they? Since my mounts are not "bad", I could install the Wevos, and if I don't like them, put new stock (or old ones) back in and sell the Wevos. I suspect used Wevos would sell easier, due to the repalceable pillow, than used RS mouns, but I may be wrong.
EDIT: the 997SS mounts do not appear to have replaceable pillows, like the earlier Wevos do. Now I AM confused. If the RS mount is a 964 part, then why wouldn't the (cheaper) replaceable pillow mounts fit the 996? Anyone?
I've had the WEVO mounts in my car for over 2 years now. Noticeable improvement on track. The NVH increase on the road is perceptible, but only barely. I have been very happy with them. Just my 2 cents.
