bigturbo

Are there any companies that make poly insert motor mounts or metal one or any other upgraded motor mounts for the T2?? I have an 87

bigturbo

Oh also how much extra vibration is felt with the rotary engine with solid mounts??? I used to have a set on my jetta and I didnt notice much diffference at all. I dont drive the RX every day but I do like to drive it on weekends. WOuld these be good for that.

Mint87RX7

www.banzairacing.net

bigturbo

thanks man for the link. So does anyone have solid or poly engine mounts?? One of my stock mounts are broken and I figured I would upgrade while Im at it.

Mint87RX7

no but i want to get those and his transmission mounts before summer. when i was at the shop he said it made a huge difference on the cars hes put them on

ddub

Scalliwag sells completely solid engine, tranny, and differential mounts. I'm running all of them, vibration doesnt bother me and only becomes noticeable at about 55mph and up.


http://cgi.ebay.com/ebaymotors/ws/eB...category=50454

http://cgi.ebay.com/ebaymotors/ws/eB...category=50454

http://cgi.ebay.com/ebaymotors/ws/eB...category=50454


You can also PM him and get a somewhat better price I think, or a package price.

lnlycrpr

I have em. take the link to Banzai Racing. They are really good quality mounts. There really isn't much of a difference at all (vibration) but you'll feel the difference in driving. Especially since you have a broken mount. Very easy to install also. I like em so much I'm gonna switch to the poly tranny mounts real soon. I'm not sure about the solid mounts, i've heard there a little harsh... but that is just from reading i have no personal experience with them.

fe1rx

A real engine or transmission mount isolates vibration with a rubber (or urethane) block that can move in tension, compression and shear. The bolt does not pass right through the rubber. Stiffer versions, if that's what you want, are available from Mazdaspeed.

The Banzai Racing transmission and engine mounts are urethane blocks with a bolt through them. In compression, the bolt will go loose. In tension the bolt will eliminate all compliance. In shear the bolt has to tilt in the mounting holes. In short, the Banzai Racing mounts are crap.

LookThatsMe

http://www.rx7.com/store/rx7/fcengine_accessories.html

fong

iTrader: (77)

any second opinion about these comments?

BlueTII

I guess you have not seen our design. It is impossible for the bolt to loosen up under compression due to the internal locking feature of the top cap. Compliance/flex is what is eliminated, which happens to be the goal. "In short" the stock mounts are crap, our mounts reduce the amount of energy lost to drivetrain movement, but if you like your stock mounts we are not forcing you to install ours. We simply designed a much more durable part, which increases performace to replace a well known weak, failure prone factory component. So as long as you like replacing the factory mounts every 5-10K miles (or every week if you are over 400rwhp) then just keep buying the mounts from Mazda, they will love you for it

fe1rx

If the goal is to remove compliance, why not go to a solid mount?

If you can "stiffen or soften" the mounts by tightening the the bolt more or less this implies that by compressing the urethane at all from its static position the bolt will become loose (ie. no tension in the bolt). Obviously if you stiffen them enough that they never compress under engine torque the bolt never becomes loose but then again the urethane does nothing but act like a solid mount. I see that your engine mounts have a threaded top cup so the nut does not become loose, but this is not true of your transmission mounts from what I see.

Your mounts have one thing going for them - they are red!

BlueTII

The bolt does act as a conduit for a slight amount of vibration to be transferred, however the polyurethane acts as an isolater. The solid aluminum mounts are a direct conduit for vibration, this is why our mounts do not cause exteme vibration at 55mph as do the solid mounts.