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Discussion Starter · #1 ·
Hi,

I've recently started to notice that my exhaust has been sitting lower and lower in the cut-out in the rear bumper. While it was in for some aircon work I asked the workshop I've been using recently (the very knowledgable and friendly Mike at www.SportsandClassic.com - Porsche specialists north west, knutsford, wilmslow, alderley edge, manchester, stoke and the whole of cheshire! sports and classic porsche cheshire and knutsford) to have a little look to see if the exhaust mounting brackets could be adjusted up a little. He turned round and told me the exhausts mounts directly to the 'box, and that the tranny mounts had a lot more than the usual amount of play in them. In fact you could move the whole 'box up and down just by pushing on the 'box.

I had been looking for an excuse to the tranny mounts for a while, and I think Tess Tickle actually has a set of Mantis ones for me still (I'll pay you for those Allan :) ). But I have always held off the Mantis ones as I was always unsure about the added vibration that a true solid mount would introduce. This is a daily driver and not a track-only toy like the other guys I know that have these Mantis solid mounts.

So, I set about trying to find an alternative to the soggy standard items. There are no motorsport OEM variant for the 987, unlike the ones available for 996 and 997. So it had to be aftermarket.

After a bit of research I stumbled on the WEVO units: WEVO SS 987 Transmission Mounts

I was blown away by how nicely made they look. Not often you see a part that goes in the grimey bit bolted to the bottom of your car look so good!

In person, they look just as good! No McDonalds QuaterPounder w/cheese counter picture-to-reality letdown here!







So they are SS (or Semi Solid) mounts, which means that in theory they should really tighten down the control of the gearbox under direction changes. Should give more accurate throttle control. Give smoother, easier gearchanges. And reduce/banish axel tramp.

But because of the SS nature it should also reduce the vibrations and noises that can be transmitted through the more traditional solid tranny mounts.

We'll see. They are due to be fitted on Wednesday.

Jack
 

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Cayman The Destroyer!
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Very cool. I have the Mantis solid mounts but I took them out as they do transmit quite a bit of extra vibration. I'll be very interested in your review of the Wevo's
 

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I have the WEVO front motor mount and I am very pleased with it. It is very well made and seems to be very durable. A great value for the money IMO.

That being said, when WEVO says for racing only they mean it. The semi solid front mount added a considerable amount of NVH (noise, vibration and harshness) to my Boxster 3.6l, many would find this objectionable however I do not. It puts the power straight down with nothing being lost. It changed the general feeling of the car from sporty to visceral.

If you are ok with increased NVH then it is the way to go.
 

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This is where we need a before and after dyno. Some folks have reported a HP loss with the solid mounts. Apparently the knock sensors pick up the vibration and retard the spark.

No first hand knowledge, just very reliable second hand.

Cheers,
 

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Discussion Starter · #7 · (Edited)
This is where we need a before and after dyno. Some folks have reported a HP loss with the solid mounts. Apparently the knock sensors pick up the vibration and retard the spark.

No first hand knowledge, just very reliable second hand.

Cheers,
Is that on a 987 or 996/997 set-up? I have heard that from another forum where members were putting non-996 specific SS engine mounts in a 996 and having that problem. I did not find any comments about the same issue with 987 chassis.

I'd be interested to hear from anyone, or pointed in the direction of anyone who has experience of this on 987's.


Mine is now installed, and there has been a large increase in NVH. If this was now being used as a daily driver I might be tempted to take them back off.

Particularly between 4-5000rpm there is a lot of resonance from the engine that is being pushed back into the car.

Landrovered, I'd like to know if you feel the engine now feels less..."balanced" now? There are certain points in the rev range that were always a bit rougher than others, now these points are adding a lot of vibration to the car. Litfing off, and letting the revs drop through 5000 to 4000rpm throws up some really nasty resonance and harmonies.

As ar as the driving/handling experience goes, well typically it rained today so all my usual roads were lethal after the week of glorious sun we've just had, and it's been impossible to drive the car hard. But there is a noticable difference in the feel of the car. It feels much more alive, a lot tauter, and there is no slop in the drivetrain. There was no axel tramp, but it was in the wet, but with some luck the roads will be dry tomorrow and I'll tkae the car to work to get a feel for how it's changed.

More info to come.

Jack

BTW, had a Remus fitted at the same time:

http://www.youtube.com/watch?v=wLHBAvjVioA

:)
 

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Hi Jackwood,

Not to hijack the topic, but u mentioned the remus.:)

Does the Remus sit higher than the stock exhaust, when viewed from the rear?
At what RPM, do you notice the drone?
Did you get it fitted at Mike's?

Thanks.
 

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Landrovered, I'd like to know if you feel the engine now feels less..."balanced" now? There are certain points in the rev range that were always a bit rougher than others, now these points are adding a lot of vibration to the car. Litfing off, and letting the revs drop through 5000 to 4000rpm throws up some really nasty resonance and harmonies.
:)
First the good news. I have found that the WEVO front motor mount settled in over time (two weeks or so)and the NVH has quieted down quite a bit. It is still there but it has gotten less pronounced. I was like you at first, thinking of pulling it out but I gave it time and now I really like it.

I have a lot more vibration at idle than a stock mount, it is not offensive but it is there and you know that something is different in this car the moment you start the motor. In the lower rev range it is fairly consistant and pretty smooth up to about 4k rpms. For daily driving I stay in this area and it is quite bearable, even pleasant.

However...If you put your foot into it, from 3k up to the red line the sound of the engine courses through every part of the car, the sound is a LOT louder than stock and the car sounds like a caged wild animal that wants to get out. It is pure awesome mechanical joy. The torque goes directly to the wheels and does not lose one iota along the way.

As for "letting off" noise and harmonics, I have a single mass flywheel and I get some wierd harmonics from time to time from that but it seems that the occasional shaking and rattling of interior bits has stopped after the mount settled in.

What is interesting as a result of installing the WEVO front mount is an increase in drivability in low revs.

I would give it a few weeks and if you hate them at that point then pull them out. I like mine.
 

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Discussion Starter · #10 ·
Hi Jackwood,

Not to hijack the topic, but u mentioned the remus.:)

Does the Remus sit higher than the stock exhaust, when viewed from the rear?
At what RPM, do you notice the drone?
Did you get it fitted at Mike's?

Thanks.
The Remus is fully adjustable, and I asked Mike (Sports and Classic) to position the tips as central as possible to the cut-out, and he did. The are spot on, all be it that one tip, when viewed from above, sits further back than the other. He said he played with it for ages, but just couldn't get them in line. Looking from the back they look perfect. Only if you stand over them and look down do they look 2-3mm out of line. I'm happy, and I'm fussy, so it must be acceptable :)

Landrovered, thank you very much. Even today, they seem better than yesterday. At motorway speed, between 3-4k the exhaust and mounts are perfect. As good, if not better, than the stock mounts and exhaust.

At idle, yes, the whole car has a mild vibration running through it. It feels like the engine and chassis are one. I like that a lot.

There is no longer a feeling of a pendulous mass suspended between the wheels at the rear either. This is going to require a slight change in driving style as the rear now flicks very quickly from side to side. The more rapid weight transfer feels different, but much better. More tightly controlled.

I am finding the power delivery much more linear. I am not, however, noticing any more low down grunt. I would have to say the reverse. It is very lethargic picking up in 2nd from 1500-3000rpm, but above that it zings around the clock. The exhaust producing the most glorious noise :)

But I don't have a re-map, and not sure if the free-flowing exhaust has reduced back-pressure which is limiting the torque low down. I think a Softronic map is in order next.

I'll let you know how the mounts settle in.

Jack
 

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Wevo makes a good product for its intended purpose. I think that the "controversy" is a "create a crisis" that had more to do with a lack of customer ego stroking than the effectivness of the product.

Everyone makes mistakes, and occasionally some people want to make a big big deal out of it. I have posted this not because I am up on all the details of the poofight on Rennlist. I don't really care.

I am pointing this out because I like my Wevo front motor mount, it works well, I have had no loss in HP in fact just the opposite, my car is faster for getting the power to the ground more directly. I don't want to see a good supplier of innovative products get tarred and feathered by an intermob.
 

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Discussion Starter · #14 ·
I amm not a Rennlist member, so could someone please sumerize the issues for me please? Are the issues 987 or 996/997 based?

So far the conditions I have had the car out in have been poor, plus I have been in the US for several days, so the car say in the airport over the weekend. Yes there is definitely more vibration coming through the car now, and it is making me wonder if there are other issues with my engine as the vibrations in certain ranges are very annoying and intrusive where at other revs, the engine feels sweet.

But I did get onto a damp Silverstone yesterday, and the way the rear changes direction is transformed. Yes the throttle does feel more sensitive. There is no pendulous feel to the rear at all. It just feels tight, firm, and hard as nails :)

It has pretty much ruined the car as a daily driver, and the drive too and from Silverstone was noisy and vibration-ridden, but as a weekend and track toy, it has transformed the car. In a very good way.
 
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