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-   Group Buy & Product Dev. FC RX-7 (https://www.rx7club.com/group-buy-product-dev-fc-rx-7-268/)
-   -   Front Diff Mount Prototype (https://www.rx7club.com/group-buy-product-dev-fc-rx-7-268/front-diff-mount-prototype-997329/)

blmcquig 10-10-12 06:37 PM

yeah, my bushing is thunking like crazy too. I'm positive that this would sell like crazy. I'm sure that nearly every FC owner probably needs to replace their mount. Hopeful that this comes to fruition very soon.

Romanator 10-16-12 05:15 PM

My car is going into storage for the winter in 3 weeks. I will gladly purchase one but will only be able to test it's potential in May of next year. Will be watching this and waiting for updates on this part.

Level Zero Motorsports 10-18-12 08:42 PM

We haven't forgotten about the mounts, but they've been on the back burner for a while as we deal with a new machine and a second shop for it. Things are finally starting to settle back down and with all of the overtime we've been putting in, we should be able to start working on r&d projects again soon.

wheezle 10-19-12 11:08 AM

I am interested in this once it comes available.

stilly415 10-21-12 12:11 AM

nice

JWteknix 11-18-12 07:53 AM

bump for the month

midnightbluefc 11-19-12 03:14 AM

i think the tabs off the actual subframe are going to snap off or become an issue where the mount is going to just slide up and down

Romanator 01-14-13 12:18 PM

any update on this ???

Level Zero Motorsports 01-18-13 03:43 PM

We've had a few installed in cars for testing. Fitment is good and although there is an increase in vibration/noise the guys testing them don't mind. Right now we are waiting for more distance to be put on the cars. This is a part that is already highly prone to breaking and we're not willing to risk selling something that hasn't been tested well enough.

Turtle13 01-20-13 06:00 PM

If it works I will buy one asap. I'm pulling my diff tomorrow to find out if mine is busted. I will most likely need one based on my amount of clunking. I will order this one asap!!!

Gregory Casimir 02-28-13 12:21 PM

What's up with the test vehicles? Any track days on this part cause I need to replace mine ASAP.

Alexsrx 03-26-13 11:26 AM

Any update on this? Still quite interested in getting one if it goes into production

my88vert 04-04-13 03:04 PM

Bump! Any updates?

fbse7en 04-05-13 01:06 AM

My diff's thunking too! Grr! Updates?!

Level Zero Motorsports 04-10-13 02:33 AM

I've been analyzing one of the test mounts and it's still holding fine, but they bushings have more wear then I wanted to see. I'm trying to increase the size of the bushings to help decrease wear. I'm hoping to be ready to tool up for these soon. We've had a few new projects pop up and as a result we are a bit short on time right now.

blame 04-22-13 08:53 PM

1 Attachment(s)
it seems to me that the stock mounts are so prone to failure because of the shearing force being applied to the bushing, one side of the bushing being forced one way, and the other side forced the other way. with the way your bushings are laid out (one end facing the diff side, one end facing the subframe side) i think that the same shearing force will be there.

your mount looks way beefier than the stock and will probably last a whole hell of a lot longer with sustained abuse, but what if you changed the orientation of the bushing to make it a compressing force instead of a shearing force?

please excuse the horribly tragic ms paint skills.. i am no artist as you can see..
Attachment 674533

if the bushings are like this, then when the diff wants to go one way and the subframe another way, the bushings will just compress in the tube they're stuffed into instead of trying to rip in half. now i am no engineer by any means, so if there is something completely wrong with my thinking here then by all means slap me upside my head.

i was just looking at my stock diff mount the other day as i was reinstalling it and thought this might be a way to eliminate the shear problem that might be the cause of the short lifespan of the mounts

-sean

BurntOrangeT2 05-06-13 12:44 PM

Bump for a response to a decent post that is unmotivated by any other reason, that I can see, than to get this product to be have better and more effectively.

Level Zero Motorsports 05-08-13 02:07 AM

Sorry for the delay in getting back to you guys. This time of year is always really busy due to everyone trying the get their projects done and cars back on the road.

Blame you are on the right track, but there just isn't enough room to do it like that. At least not to my standards. The other problem is all bolts need to be properly isolated from metal on metal contact to prevent noise.

assad112000 05-10-13 01:08 AM

im interested in this too

czarlos 05-10-13 01:23 AM

I need one in my life! I don't want an OEM one if theyre prone to breaking haha

fbse7en 06-08-13 01:07 AM

The OEM mount is straight embarassing!

sharingan 19 07-02-13 01:18 PM

Pretty sure I just broke my mazdaspeed mount and that was WITH a pinion snubber, this product is sorely needed.

assad112000 07-03-13 03:44 PM

PBM finally came out with theres and its only $50. kills the competition

cone_crushr 07-03-13 11:17 PM

^...right up until you rip the tab off your subframe.

midnightbluefc 07-04-13 12:28 PM


Originally Posted by sharingan 19 (Post 11510230)
Pretty sure I just broke my mazdaspeed mount and that was WITH a pinion snubber, this product is sorely needed.

dont say shit like that! its supposed to be bulletprooF!!!!! i got the competition mount with a PRELOADED snubber... my feels good. i had to throw like 5 shims on there for it to totally smash the snubber. there was like no room to thread the shim tho, managed to get a turn and a half on it tho

midnightbluefc 07-04-13 12:31 PM


Originally Posted by cone_crushr (Post 11511561)
^...right up until you rip the tab off your subframe.

Oh yea i can see that happening with it....




http://www.gtfactory.jp/cms/e107_fil...1_dsc04905.jpg

sharingan 19 07-08-13 12:48 PM

Sorry to say, but the mazdaspeed unit is far from bullet proof. It's simply a moronic design which has very little shear strength, odd considering that is the one force acting on the mount.

I sure as hell won't be buying another one (mazdaspeed) since they are over $100 now and I would prefer to have a Level Zero prototype over the PBM piece, but it looks like I'll have no choice since I'm not going to throw money down the drain on another mazda unit and this is the only one available....

sharingan 19 07-08-13 12:52 PM

And as far as breaking the tabs off, a little gusseting of the stock tabs will go a long way toward fixing that, might as well since you have to drop the subframe to replace this crap anyway.

rotorhead_izzy 08-06-13 11:53 PM

If you needed another test mule, I'd test one for you. Car is autox'd on a regular basis, drive it on the street quite a bit too

Level Zero Motorsports 08-08-13 01:46 AM

Right now we are booked up on the cnc mill. Once we have an open slop I'm hoping to get 5-10 beta versions done.

rotorhead_izzy 08-08-13 09:32 AM

Keep me in mind, I'll put it thru its paces

MaczPayne 08-09-13 09:44 PM


Originally Posted by sharingan 19 (Post 11514929)
And as far as breaking the tabs off, a little gusseting of the stock tabs will go a long way toward fixing that, might as well since you have to drop the subframe to replace this crap anyway.

I removed the factory mount from my subframe, and substituted one made from 3/16" steel plate.

fbse7en 08-12-13 09:32 PM

*Bump*

Has anyone actually ripped the tab off the subframe? People keep talking about it but I've never seen a single pic of such a failure anywhere online...

Kappa 08-12-13 10:17 PM

sub

misterstyx69 08-12-13 11:33 PM


Originally Posted by fbse7en (Post 11545530)
*Bump*

Has anyone actually ripped the tab off the subframe? People keep talking about it but I've never seen a single pic of such a failure anywhere online...

There IS a pic on forum of one ripped off.

Will this part ever be produced???My cars' gonna get registered as an antique!..lol!

yudaya 08-29-13 11:18 AM

I've ripped the mounting point off twice! Had to get rid of the solid steel mount, not only for it breaking subframes but I read that having a solid mount can oval out your ring gear I don't know how true that is..but I got tired of breaking stuff, and I didn't want to risk having to source another t2 diff

atli126 08-29-13 12:45 PM

ttt any new updates on this. I Have a solidish setup and a clunk now

RotaryEvolution 09-23-13 12:24 PM


Originally Posted by fbse7en (Post 11545530)
*Bump*

Has anyone actually ripped the tab off the subframe? People keep talking about it but I've never seen a single pic of such a failure anywhere online...

i have seen it on 2 cars personally. though not common it gives an idea of the forces that can be present to do such damage.

midnightbluefc 09-24-13 03:31 PM

mine wasn't ripped off but it was slightly bend out where the little oval washer holds the mount in place

jdmtovar 12-26-13 03:36 PM

broken tabs here as well!

Tanj! 01-07-14 05:43 PM

Updates? Will be assembling a new subframe in the next 30 to 45 days and am still waiting for a suitable part to replace the OE style.

atli126 02-24-14 09:37 PM

Would like to know also!

m@nu 05-26-14 07:29 AM

interessting ... !

rotorhead_izzy 05-26-14 08:40 AM

Any updates on the mount?

cab91089 06-03-14 09:00 AM

If the mount works out good I'll take one when I swap my diff out for an LSD unit!

atli126 06-09-14 07:56 AM

This is such a shame. All this interest but no followup by the seller...

cone_crushr 06-09-14 08:19 PM

The front diff mount is definitely a weak spot in the drivetrain design, but I believe the LZM mount design is a nonstarter. Solving this problem is harder than it looks.

Level Zero Motorsports 06-09-14 10:05 PM

Not enough hours in the day. We don't release products until everything is perfect, suppliers are nailed down and we know we can meet deliver obligations. There are 6 small bushings used in the current design. They are made one at a time on a manual lathe. Urethane is difficult to machine at the best of times, when it gets small and accuracy is required it is damn near impossible. We've looked into having them made for us, but the cost of tooling up will signification add to the final cost.

We have a few other products we need to get launched right now, but the diff mount is on the active product development list.

trueimport 07-12-14 11:58 AM

I have this prototype on my car as we speak. I hope to have my car mobile by months end. Once I get some seat time I'll give feedback on the mounts performance. For now I can comment on fitment and quality which both are top top top notch. I also had LZM make me a set of delrin upper rear diff mounts/dushings as well as a set delrin subfram bushings. Again the quality and fitment are outstanding.

atli126 04-11-16 10:50 AM


Originally Posted by trueimport (Post 11767230)
I have this prototype on my car as we speak. I hope to have my car mobile by months end. Once I get some seat time I'll give feedback on the mounts performance. For now I can comment on fitment and quality which both are top top top notch. I also had LZM make me a set of delrin upper rear diff mounts/dushings as well as a set delrin subfram bushings. Again the quality and fitment are outstanding.


This post was 2 years ago any update? I really need a good solution to my Mazdacomp front mount I've already broken two now


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