BTKUSA Diff mount with bushing

[Turbro]

Anyone use this yet? Thinking of picking this up

Looks like a badass solution for those who don’t want solid mounting. I can’t stand solid mounting. I prefer having a bushing solution.

https://builttokillusa.com/products...al-mount-g-series-m240i-m340i-m440i-a9x-supra

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[itzTang]

cant even compare to https://www.rapiddesigns.us/store/p/a90-supra-differential-brace
@rwense

 

[rwense]

Anyone use this yet? Thinking of picking this up

Looks like a badass solution for those who don’t want solid mounting. I can’t stand solid mounting. I prefer having a bushing solution.

https://builttokillusa.com/products...al-mount-g-series-m240i-m340i-m440i-a9x-supra

While I applaud the machine work of it (ngl it looks pretty damn cool), I think its overkill.

Take it for what you will (cause at the end of the day its my company) the Rapid Designs brace is everything you need and nothing you dont while being at the lower end of the cost spectrum. Ive had numerous people tell me they have zero change in NVH. I also have only noticed a tiny bit of it in my own car but thats only past 60mph while under deceleration or a bit in 6th. Its important to note my car also has a half-cage, subframe bushings, transmission bushings, and I normally have the rear carpet off. If you dont have any of those I HIGHLY doubt you'll feel a difference.

 

[Turbro]

cant even compare to https://www.rapiddesigns.us/store/p/a90-supra-differential-brace
@rwense

Sold out :/

While I applaud the machine work of it (ngl it looks pretty damn cool), I think its overkill.

Take it for what you will (cause at the end of the day its my company) the Rapid Designs brace is everything you need and nothing you dont while being at the lower end of the cost spectrum. Ive had numerous people tell me they have zero change in NVH. I also have only noticed a tiny bit of it in my own car but thats only past 60mph while under deceleration or a bit in 6th. Its important to note my car also has a half-cage, subframe bushings, transmission bushings, and I normally have the rear carpet off. If you dont have any of those I HIGHLY doubt you'll feel a difference.

Ya my Mkiv has solid diff bushings. Huge mistake lmfao. Removing them now as it’s so fucking loud like straight cut gears. Didn’t wanna go that crazy with the MKV but if nvh is minimal I’ll just get yours.

It sounds like the brace works because the diff still has rubber mounts which absorbs the nvh I assume

 

[swrdply400mrelay]

Sold out :/




Ya my Mkiv has solid diff bushings. Huge mistake lmfao. Removing them now as it’s so fucking loud like straight cut gears. Didn’t wanna go that crazy with the MKV but if nvh is minimal I’ll just get yours.

It sounds like the brace works because the diff still has rubber mounts which absorbs the nvh I assume

They’re sold in batches via group buy. Check with @rwense when the next one opens.

 

[Habu]

While I applaud the machine work of it (ngl it looks pretty damn cool), I think its overkill.

Take it for what you will (cause at the end of the day its my company) the Rapid Designs brace is everything you need and nothing you dont while being at the lower end of the cost spectrum. Ive had numerous people tell me they have zero change in NVH. I also have only noticed a tiny bit of it in my own car but thats only past 60mph while under deceleration or a bit in 6th. Its important to note my car also has a half-cage, subframe bushings, transmission bushings, and I normally have the rear carpet off. If you dont have any of those I HIGHLY doubt you'll feel a difference.

I personally don’t mind some NVH. If it makes the car more visceral (more in tune with the engine, drivetrain, body) I’m fine with it. It’s a damn race car anyways at the end of the day.

 

[rwense]

Sold out :/




Ya my Mkiv has solid diff bushings. Huge mistake lmfao. Removing them now as it’s so fucking loud like straight cut gears. Didn’t wanna go that crazy with the MKV but if nvh is minimal I’ll just get yours.

It sounds like the brace works because the diff still has rubber mounts which absorbs the nvh I assume

I totally understand haha. But you're correct!

Ill be doing another group buy toward the end of the month or early next month. Ill post in my thread

https://www.supramkv.com/threads/rapid-designs-a90-supra-differential-brace.34406/

 

[Turbro]

I personally don’t mind some NVH. If it makes the car more visceral (more in tune with the engine, drivetrain, body) I’m fine with it. It’s a damn race car anyways at the end of the day.

For me the MKV is the comfy quieter weekend car for me. The Mkiv is the crazy monster that is a little much to drive haha.

 

[stormgreysupra]

A lot of positive feedback from the X3/4M community on this product. I haven’t seen many people running them on the Supra yet but it’s also the brace I have been looking to put on my car.

 

[lucky phil]

This looks a more sensible design than the other available option here. For starters it has a rubber damper which is good. People don't seem to realise that part of the rationale for elastic mounts is to not only reduce cabin noise and vibration for comfort but to also offer some protection for the chassis components. The elastic bushes not only dampen vibrations which cause driver discomfort but also fatigue cracking in the long term and also absorb the shock loading directed to the chassis through the hard mounts. So it's like the difference between hitting an object with a 5 pound hammer directly and hitting the same object with a piece of rubber protecting it. Same impact pressure but the rubber absorbs the impact and helps protect the object. A very basic and unsophisticated example but none the less somewhat apt. So for suspension bushings it's chassis isolation and protection from road shocks and for the driveline it's from the torque shocks esp in a manual. Bolting some rigid lump of aluminium to a fixed chassis member no matter how "cool" it looks is what we used to call "Battleship engineering" in the aviation business. Crude. Just because it fits easy for the home mechanic and "looks cool" doesn't mean it's a smart move for a road car. Race cars don't matter, they trade off all sorts of things for rigidity including chassis cracking.
Not a huge fan of the name though. "built to kill" for gods sake. Can no one come up with a name with any class these days.
Phil

 

[Habu]

This looks a more sensible design than the other available option here. For starters it has a rubber damper which is good. People don't seem to realise that part of the rationale for elastic mounts is to not only reduce cabin noise and vibration for comfort but to also offer some protection for the chassis components. The elastic bushes not only dampen vibrations which cause driver discomfort but also fatigue cracking in the long term and also absorb the shock loading directed to the chassis through the hard mounts. So it's like the difference between hitting an object with a 5 pound hammer directly and hitting the same object with a piece of rubber protecting it. Same impact pressure but the rubber absorbs the impact and helps protect the object. A very basic and unsophisticated example but none the less somewhat apt. So for suspension bushings it's chassis isolation and protection from road shocks and for the driveline it's from the torque shocks esp in a manual. Bolting some rigid lump of aluminium to a fixed chassis member no matter how "cool" it looks is what we used to call "Battleship engineering" in the aviation business. Crude. Just because it fits easy for the home mechanic and "look cool" doesn't mean it's a smart move for a road car. Race cars don't matter, they trade off all sorts of things for rigidity including chassis cracking.
Not a huge fan of the name though. "built to kill" for gods sake. Can no one come up with a name with any class these days.
Phil

That makes sense for the most part. I personally use Polyurethane mounts and so far haven't seen any issues for the time being. (about 10K miles so far). Im not too concerned about it. Im not really a fan of the BMW stock mounts in my opinion (too much play). I do know some of their higher end cars like their CS/CSL models do utilize a stiffer rubber based mounts. (not poly) Same for Porsche. As for the diff, I do get wheel hop occasionally..and it does flex a bit.

 

[mojo_jojo77777]

Sold out :/

There is actually a gold one on ebay right now, that seems like someone bought but never installed.

https://ebay.us/m/aPeLjp

 

[rwense]

There is actually a gold one on ebay right now, that seems like someone bought but never installed.

Oh huh it looks like you're right. Never thought I'd see one of my products on ebay so fast lol.

OP here's the link:
https://www.ebay.com/itm/1883800672...KsF/PRldNqCLJoYZC60+Wlcw==|tkp:Bk9SR57KhPbEZw

 

[Turbro]

Buying group is open today. Went ahead and got one new

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