87944turbo

Are there any reasons out there not to run solid engine mounts? I understand that there is more vibration involved with this setup. But I am more concerned with whether or not it will cause problems with other parts. For example, if you are you using solid engine mounts, should you be using solid transmission mounts as well?

Eric in Chicago

I dont see a good reason to run solids on a street car. The downside of solid engine mounts is they will vibrate much more, things in your engine bay will become loose. Unless your perpared to nut and bolt your car a couple times a year, I dont think it is worth it. Solid trans mount is not needed for a street car, again, transfer of energy to other parts will happen (think cv bolts, suspension bolts,etc). With that being said, solid engine mounts did not make the car shake like a cement mixer, I really did not notice that big of a diff. last season (I have a race only car) I bought the Lindsey super mounts which do have a little rubber and are not pure "solid" mounts.

87944turbo

Thanks Eric, I was trying to make this a one time fix. I hate the thought of replacing these things more than once. But I don't like the thought of other things virbating loose either!

theedge

The Supermounts are an option...

87944turbo

your right edge. I should have mentioned that I asking b/c I was looking at a pair of used solid mounts that are about the same price as a pair of aftermarket rubber mounts.

User 41221

Solid mounts are a TERRIBLE idea in a street car, especially if you don't also run a solid tranny mount. Two big problems top be concerned about. First, the increased vibrations are a major concern, especially for the plastic oil pickup tube, which get old and brittle and will crack, causing you to lose your oil pressure. Race tracks are generally have a much smoother surface than streets, so its not nearly as big a concern for track only cars.

Secondly, and at least just as importantly, if you run solid engine mounts, you HAVE TO (repeat that as many times as you need to until it sinks in) run a solid tranny mount. The driveline in a 944 is designed to "float" at the three points. If you remove two of the three floating mounts, ALL the movement gets transferred to the third and the whole thing will act like a pendulum, which will result in damage and unpredictable behavior.

Regards,

87944turbo

Thanks sh. What your saying does make sense. And is what I was afraid of. If you take something that used to move and make it stationary, that motion has to go somewhere as you said. Looks like I will be sticking with regular mounts then. I just don't understand why the genuine rubber mounts are twice as much as the aftermarket ones???

theedge

Because the aftermarket stock ones are peices of **** that wont last 5k miles.

If you want stiffer front mounts, look at the Lindsey Racing Supermounts. Theyre harder rubber, so they flex and dampen some vibration, but they are as mushy and flexable as OEMs.

User 41221

I have to take issue with the "aftermarket is $h!t" comments. I have run aftermarket mounts and had very good luck with them, and I have also run Porsche factory mounts and had them fail after a relatively short time. I have also aftermarket mounts and had them fail after a very short time as well. What I have found is that the German made OEM mounts that you can get on evilbay for around $90/pair seem to hold up as well as anything else, and some of them that I have bought appear to have the factory part number rubbed off, which makes me suspect that they come off the same assembly line.

The Lindsey Super mounts intrigued me for a while, but for the price, I decided to just stick with the same aftermarket ones I always run, and haven't had any real problems with it. YMMV, so don't hate me if you take my advice and then decide I am wrong! lol

Regards,

APKhaos

If you go with harder-than-stock/softer-than-solid engine mounts like the Lindsey, then you might want to think about stiffening your trans mount as well. Urethane potting does a nice job while still providing ample vibration damping.

Sam Lin

What plastic oil pickup tube? Where can I buy one?

Sam

User 41221

lol... I'll stay away from the beer before posting next time. Sam's right, its not plastic, its metal. I've seen three of them fail tho, and they do fracture like plastic, either with a linear crack in it, or a shear fracture near the base.

Regards,