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solid tranny mounts
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CBass  



Joined: 03 Nov 2002
Posts: 2807
Location: Vancouver, Canada

PostPosted: Tue Aug 22, 2006 4:01 pm    Post subject: solid tranny mounts Reply with quote

Made up a set of these today for my car. Only thing I can say is wow... Acceleration really hits harder and the car not only feels faster, it's noticebly faster. I had to let off in some of the twisties tonight and even got a little sideways accelerating in only a slightly brisk manner around a tight corner.

Anyone interested enough to see pics?
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morghen  



Joined: 21 Jan 2005
Posts: 8177
Location: Romania

PostPosted: Tue Aug 22, 2006 5:05 pm    Post subject: Reply with quote

yes !
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pcarfanatic  



Joined: 18 Nov 2005
Posts: 6
Location: South Africa

PostPosted: Tue Aug 22, 2006 5:07 pm    Post subject: Reply with quote

Cannot wait!!!! Yes please!
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Peter_in_AU  



Joined: 29 Jul 2001
Posts: 2742
Location: Sydney, Australia

PostPosted: Tue Aug 22, 2006 5:13 pm    Post subject: Reply with quote

and a price for a set
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Chrenan  



Joined: 15 Jan 2003
Posts: 3899
Location: Canada

PostPosted: Wed Aug 23, 2006 12:00 am    Post subject: Reply with quote

Will they work on a 1980 5-speed? Price for a set? Any noticeable increase in harsh vibrations? Do you need to be running solid engine mounts as well?
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Raceboy  



Joined: 01 Mar 2004
Posts: 2321
Location: Estonia, Europe

PostPosted: Wed Aug 23, 2006 1:00 am    Post subject: Reply with quote

On a dog-leg it's shouldn't bring any noticeable increase in vibrations or noise because tranny is mounted onto the torsion bar carrier. On Audi-type noise/vibration will probably be louder.
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Lizard  



Joined: 03 Nov 2002
Posts: 9364
Location: Abbotsford BC. Canada

PostPosted: Wed Aug 23, 2006 1:12 am    Post subject: Reply with quote

he has a snailshell in his car right now,

I would be afraid of breaking the tranny case,
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-nick  



Joined: 16 Nov 2002
Posts: 2699
Location: Cambridge, MA

PostPosted: Wed Aug 23, 2006 1:25 am    Post subject: Reply with quote

I'm squinting my eyes at the thought too. In addition to stress on the trans case, the torsion bar carrier is mounted to the body with flexible mounts. Any twist from the engine is going to be transmitted into twisting the whole torsion carrier - which includes the attached control arms. This could do really funny things to the handling when you're on/off the throttle going around a turn.

I would think it should be more of an all or nothing deal with solid mounts - with the snailshell you also need solid engine mounts and solid torsion carrier mounts, with the Audi trans you just need the additional solid engine mounts.

I've heard of 911 folks tearing through the engine case with solid mounts. Our block is iron, which should alleviate that problem, but the gearbox is susceptible to cracking the aluminum case.
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Min  



Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada

PostPosted: Wed Aug 23, 2006 1:59 am    Post subject: Reply with quote

I guess we'll find out if cbass breaks something. Always good for someone to guinea pig these sorts of idea's.

Min
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StienbargerR  



Joined: 28 Oct 2005
Posts: 1362
Location: Richmond, IN

PostPosted: Wed Aug 23, 2006 6:12 am    Post subject: Reply with quote

I'd like to see it. If it is sucessful, I might make a pair myself, that is if it fits the 4 speed trans.

Ryan
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morghen  



Joined: 21 Jan 2005
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Location: Romania

PostPosted: Wed Aug 23, 2006 8:03 am    Post subject: Reply with quote

pictures please....sounds interesting...but not realy beliveble that the car is actualy faster.
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simsport  



Joined: 06 Nov 2002
Posts: 573
Location: UK Warrington

PostPosted: Wed Aug 23, 2006 9:34 am    Post subject: Mounts Reply with quote

There is a cheaper way of tightening the snailshell mounts.
Take a short strip of flat steel bar, approx 1/8" thick and cut so it is a little longer than the outside metal case of the gearbox mount. Drill a hole to take the mount center bolt and run the bolt through that hole.

What it does is limit the 'inwards' movement of the rubber mount, and as you have one on both sides it keeps the box steady whilst still allowing a small amount of movement overall.

I ran my supercharged car this way for several seasons, I also had Vibratechnics engine mounts.

Cheers
Simon
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NEMESIS  



Joined: 29 Jul 2006
Posts: 296
Location: BamaLamaDingGone, of course!

PostPosted: Wed Aug 23, 2006 1:06 pm    Post subject: Re: Mounts Reply with quote

simsport wrote:
I also had Vibratechnics engine mounts.

Cheers
Simon


Wouldn't happen to have a part number for those mounts would you? I can't find an alternative to stock in this item anywhere.
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Min  



Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada

PostPosted: Wed Aug 23, 2006 1:12 pm    Post subject: Re: Mounts Reply with quote

NEMESIS wrote:
Wouldn't happen to have a part number for those mounts would you? I can't find an alternative to stock in this item anywhere.


http://www.vibra-technics.co.uk/parts/part-details.asp?id=362

Min
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CBass  



Joined: 03 Nov 2002
Posts: 2807
Location: Vancouver, Canada

PostPosted: Wed Aug 23, 2006 1:45 pm    Post subject: Reply with quote

I hadn't intended on making sets for sale actually, and I can't guarantee that doing this won't horrible #### up the rear suspension or crack the tranny case... Oh well, you only live once. The vibration isn't bad at all. You can only really feel it when slipping the clutch or blipping the throttle at a stop. I do get vibrations around 2800-3200rpm, but I think that's because one of my motor mounts has gone bye bye.

Backstory is, motor mounts have gone bad, I need the car to commute and I didn't like the interesting new noises my transmission was making as a result. It's a temporary fix until I can get new motor mounts.

It's a really simple mount, just a block of 3x2" billet aluminum 2" wide. I took measurements off of a stock mount and made a solid piece that would fit in the same space.

Not having access to a decent metric stud, I tapped the bottom for 1/2"-13NC and used a bolt with loctite and a lock washer. I reused the original bolt for the transmission.

Only issues were the locating tabs for the mount. There are a couple of raised bumps that are to keep the steel bracket of the original mount from spinning and the flange face on the transmission has a lip at the very top to keep the rubber from twisting.

You'll have to forgive the poor quality of the pics, taken with a camera phone and a lamp from underneath my car.







So I guess the theory is that the tranny being rigidly located and the engine not being rigidly fixed will cause metal fatigue and break things? I might just try on some solid motor mounts and see how bad the vibration really is
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