Miata Turbo Forum - Boost cars, acquire cats.

- Race Prep (https://www.miataturbo.net/race-prep-75/)

- - NA / NB engine drop mounts (https://www.miataturbo.net/race-prep-75/na-nb-engine-drop-mounts-89332/)

Quote:

Originally Posted by Blackbird (Post 1343129)

The drop mounts are meant to lower the CoG, but the design offers more than just that.
One of the most common issues you'll run into while driving hard is that the OEM motor mounts (and the replacement "competition" mounts from Mazda) allow the engine to move A LOT.
This in turn causes the engine to torque over so much that when you're trying to shift, the next gear is just not there, causing you to miss the shift you're going for.

By stiffening the mounts you're keeping the motor and trans where they should be, and with the added benefit of lower CoG, it's a win-win situation :)

Ahh, not sure how familiar you are with the MT-82 6 speed in the mustangs, but that's a pain i'm all too familiar with haha. Thanks for the reply.

Not familiar with the Mustang issues, but ghost shifts in tracked Miatas are a very common problem.

Yep. You have to anticipate it. If you do, it's OK. Concentration drops a bit and you either miss the shift, or worse, money shift.

Or, you get motor mounts that prevent the issue and improve CoG while at it :)

So are they available yet?

Quote:

Originally Posted by Chilicharger665 (Post 1343953)

So are they available yet?

this

A week ago I said "in 2-3 weeks", this has not changed :)

Yep, as soon as we have final pricing.

Quote:

Originally Posted by Blackbird (Post 1343958)

Yep, as soon as we have final pricing.

I'm sure it will cost less than a money-shift. :)

So what's the difference between these and the supermiata competition motor mounts besides lowering the engine 1/2"? Are they more forgiving in terms of nvh? Would the 70a duro version be good for say my turbo NB daily driver? I have newish Mazda comp mounts in now but I'm tired of missing shifts. Will these cost less than the supermiata mounts? If the 70a is daily drivable I'll order a set asap!

Quote:

Originally Posted by 92turbomiata (Post 1344208)

Similar design, and with the same durometer bushings probably the same NVH. That said, he's mentioned a lower NVH version that would be more appropriate for a DD.

Quote:

Originally Posted by 92turbomiata (Post 1344208)

In the order you were asking -
* Lowering the engine is not a small difference (!), we also spent some time into reducing the weight of the mount which why they are shaped differently.
* The standard 70A version is going to be similar in terms of NVH, but we're also working on a lower NVH version.
* Depending on your preferences, some people would be A-okay with the additional NVH, some people will complain about anything more than stock... How it works for YOU is an individual thing.
* No, they won't, I expect them to cost a touch more because there's a bit more fabrication involved in the making of our mounts, but only *A TOUCH* more.
* Wait for the low NVH version, it's going to be the missing link between any existing aftermarket mount and the Mazdacomp mounts that are still too soft, we'll have them prototyped within a handful of days, we're only missing one part which should be here shortly.

Are the bushings universal between the setups to swap out should we desire an increase/decrease in stiffness?

No, the low NVH version uses a different bushing altogether.

Finished the second prototype including the low NVH bushings and drove right straight to my powder coaters, should be back soon and then straight off to testing.

I took a quick pic of the bottom of the car before we sent the part out to powder coating to show the way the oil pan lines up with the subframe -

https://cimg5.ibsrv.net/gimg/www.mia...5f38ea3174.jpg

Looks awesome! You can throw a set in with my rollbar shipment :)

Your bar is at powder coating and we should have it shipped to you in a few days :)