Its come to light this evening that some types of caliper mounting brackets could be unsafe! the ones in question are the same as attached to my TT and if the majority of the votes say they are NOT safe i will be removing them!!

 

I purchsed the Evo brembo calipers, discs and mounting brackets 3rd hand from a member and had no worries when attaching them to my car, I did ask for a 2nd opinion from my mate in the fabrication trade to see if the were ok, we both said as the bolt is going right through the bracket and into the caliper it could never come off even in the unlikley event of the weld breaking!

 

Please dont think i am trying to defend my self, i need to know if they are safe for me also.

 

I am happy with mine at the moment and i know that a lot of people have these type of brackets attached so can we have a discussion on your views please.

 

Its weird that no one mentioned when I had fitted these brackets they could be unsafe, they left it till I had them for sale?????

 

here are the brackets below and the way they are attached

 

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Edited March 30, 201015 yr by daZvert

Daz,

I have looked at the brackets manufactured, and the quality in my eyes is first class. I will be taking them to work in the morning for my x-ray department, my welding and my heat treatment depatrment to get their opinions. Not looking to hang you buddy, just a few extra eyes to see what they think. I work in the aviation industry, and have some very gen people working with me. Maybe as a thought i could get them de-brittled, then hardened and tempered, just a thought.

 

Al.

For me personally and it is only my own thoughts, i am not a lover of welded pieces of metal that will hold something fairly weighty and stop it from any movement during force.

The bracket to hub is IMO 100% bob on, the caliper to bracket, wouldn't be for me personally.

Only thing i noticed was the back of the weld seemed ground off to make it square with the edge of the bracket?

 

A machined block of good quality material with no welds though more expensive, is the only way i wanted to do the GTR relocation kits i done, but as said above, based on my own thoughts and fears of repercussions.

 

So please don't take this as an expert veiw or gospel :-)

smithy

Edited March 30, 201015 yr by Smithy

This is what you call a caliper bracket, No welds here :D milled from scratch. Cost a pritty penny. £300 No chance in bending these puppies. The 90degree angle gives them super strength along with the thickness.

 

 

Why on earth do you want to go and put some German porsche calipers on your car, you should give them too me, ill make a nice toast holder out of them for you :innocent:

Also we have a tensile testing machine.

 

Al.

My mate did actually quote me about £300 to get the ones mentioned in 1 piece! I think to be on the safe side i will get some made, If you could let us know what they are made of Jimmy and i will get some fabricated. Nice brackets by the way :bow:

do you know what steel they were made from jimmy?

 

 

they saw you coming...................!

 

but i suppose 300 is a good price to pay for public liability insurance ;)

 

lol You gota do things properly. and this is how its done. Mild steel!!! Sprayed with hammerite so they dont rust like the above pic, like i said milled from scratch and NO WELDS. Calipers cost me £100, brackets, £300 discs £550 pads £200, front and rear ducting fook all..... lol well 40 odd quid.

Also we have a tensile testing machine.

 

Al.

 

that would be cool to know what these break at.

but first you need to calculate the forces applied to the brackets from a 300zx ;)

Also we have a tensile testing machine.

 

Al.

 

now that's what I'm talking about :D

 

Al, you should see if your aero buddies can make a safe caliper bracket, I'm sure you would make a nice profit on the side doing that. especially if people know they are getting good quality items that have and can be tested.

The welded part of a fabrication is the strongest, in some cases stronger then the material itself. The weakness is the srrounding element. The heat anneals the weldded area, then the further out from the weld, the more brittle it becomes. This is why, when you see a welded item crack/break, it is in-fact, the edge of the weld, not the weld itself.

Al.

that would be cool to know what these break at.

but first you need to calculate the forces applied to the brackets from a 300zx ;)

 

I actually reckon the lugs on the hub would snap before the brackets give way, IMO, IMO, Dont shoot me down!! :whistling:

I actually reckon the hub would snap before the brackets give way, IMO, IMO, Dont shoot me down!! :whistling:

 

well they are only shitty cast aluminum anyway LMAO!!!!

well they are only shitty cast aluminum anyway LMAO!!!!

 

lol im off to bed.....

These are the brackets I had made for the AM callipers I fitted..............

Cast aluminium, very brittle indeed!!!

 

Al.

Daz,

I have looked at the brackets manufactured, and the quality in my eyes is first class. I will be taking them to work in the morning for my x-ray department, my welding and my heat treatment depatrment to get their opinions. Not looking to hang you buddy, just a few extra eyes to see what they think. I work in the aviation industry, and have some very gen people working with me. Maybe as a thought i could get them de-brittled, then hardened and tempered, just a thought.

 

Al.

 

Spot on mate, glad you like them, yes bud let us know how you get on, I would like the one`s on my car tested too, and will get some 1 piece made up if they are poor :thumbup:

lol im off to bed.....

 

Night bud.

 

I think if the metal is of good construction, i cant see there being a problem, go out to a empty carpark, and do some hard braking, see if they warp or snap, make sure you have a goooooood looooooong distance in front of you when you brake

If you get some brackets machined from a billet of aluminium or steel, all corners and intersections must have a minimum radius set by design, again to prevent cracking. A flaw can start from a machined item with a very small radius or no radius at all, same theory as bending sheet metal, small bend radius->liable to crack, large bend radius->not liable to crack.

Al.

These are the brackets I had made for the AM callipers I fitted..............

 

:bow:

well they are only shitty cast aluminum anyway LMAO!!!!

 

 

Exacly

The welded part is only a spacer, so the welding itself is not taking any great load.

 

Paul

The welded part is only a spacer, so the welding itself is not taking any great load.

 

Paul

 

Thats been my thought all along! they cant move anywhere:cool3:

 

Exacly

 

thats cast iron.

anyway cast aluminium depending what its alloyed with too and the type of casting process can be very strong.

Edited March 30, 201015 yr by hellraiser

thats cast iron.

 

 

:oops:

The welded part is only a spacer, so the welding itself is not taking any great load.

 

Paul

 

Agreed. Its the bolt and the main bracket that the forces are put through, but if you have the option to have it remade in one piece then go for it.

 

Tbh, its not much use speaking to the "engineer" that made them anyway as its very likely made by a machinist and not an actual engineer.

 

This country is terrible for mixing up the term "engineer", in other countries the name is protected but here is handed out to any job title (sorry, personal rant).

 

If your concerned then find a qualified Mechanical engineer (or motorsport engineer may be more applicable) to inspect it.

Edited March 30, 201015 yr by Yowser

The problem with anything like this is that the proof of the pudding is in the testing! Without being able to check the failure point & knowing what a full on breaking procedure in a zed is & the forces it can excert, the first time you will know if they are not safe is when one fails :ohmy:

 

All people on here can do is give opinions & will provide great reasons for & against the possible safety implications of these brackets.

 

Opinions will mean very little if one does fail! :angel:

 

Just my thoughts!