Start of 156 20v Big Brakes

I wouldn't feel safe with them on my car!!!

Could you not of had the brackets machined with extra thickness of the washers included??

Also what strength are those bolts??
Look like at most 8.8 where as you want 10.9 or 12.9 grade

They'll be alright, they're spaced out with washers! :lol:

yes I second the concern of the washers and bolts. you can buy 6mm spacers on ebay if your unable to machine them.

The washers are there for fitting purposes so I can centre and get exact measurements at which point someone is making me a real spacer which I may even have welded on... however loads of 155 guys have used the washers to space 166 callipers and after plenty of miles of hammering, track days in some very nice updated beasties Not a single person has had any issues at all... once those 166 bots are seriously torqued they go nowhere...

Yes anything is possible but it's all money.... Now I have spacer measurements and brackets that will fit I may have a better set made but think i'll just have spacers made to replace washers....

Anyway we had all same discussions on 155 forum and years later after lots of driving, track work etc and inspections there has not been a reported issue. Like I say temp for a few weeks (then correct spacers fitted - if others used them on track fro years a few weeks gentle use will be fine). Other bolts just for show not ones I'm fitting

John

what measurement did you get. 6mm?

No sure yet but think 4 washers is right from when I had a test fit...

I'll see if I can find a tape and check....

.... measured... 10mm was what I got from test fit but will know for sure tomorrow. Think on 155 they were about 6mm but they use the 304mm discs for 4 stud and iirc they are not as thick as 305 gta ones which may explain some difference....

Anyway i'll fit and take photos tomorrow and confirm spacer size

John

Well one side fitted

Other side required a wee brake pipe from one side to other of calliper replaced so it's changed. Just need to go back out and fit later...

Handy hints for anyone doing this themselves. If you have 17's I'd highly recommend 330 gta discs as it would allow calliper to mount pads in optimal position and need smaller spacer size on wheels... i'll likely go new brackets and 330's when pads and discs need done.

Spacer size on 156 would be 9mm

So there we have it.. will do some pics later or tomorrow

2 sides fitted..... ok to start, 10min in... good... 25min in AWESOME and a lot of bedding on still to go....

Fantastic upgrade

mr-mac said:

Handy hints for anyone doing this themselves. If you have 17's I'd highly recommend 330 gta discs as it would allow calliper to mount pads in optimal position and need smaller spacer size on wheels... i'll likely go new brackets and 330's when pads and discs need done.

Click to expand...

330x32mm GTA discs will be too thick for the 166 caliper.

Are you using the nuts and bolts you've shown in the picture to fit them to the hub.?
They have a standard pitch thread, caliper or carrier bolts always have a very fine thread to lower the risk of them working loose, if you are using bolts with standard pitch thread then you should at least be using lock tab washers.

David C said:

330x32mm GTA discs will be too thick for the 166 caliper.

Click to expand...

Bells and rotors then then I can choose a 330x28

JON156VELOCE said:

Are you using the nuts and bolts you've shown in the picture to fit them to the hub.?
They have a standard pitch thread, caliper or carrier bolts always have a very fine thread to lower the risk of them working loose, if you are using bolts with standard pitch thread then you should at least be using lock tab washers.

Click to expand...

Neither of the bolts holding on old calliper hanger or m14 166 ones look fine thread?

However like I say these were for test fit. I have 10.9 ones coming that will have a normal nut and then a nyloc and plenty of thread lock as well (keeping nylock on far side of bracket seems to stop them melting but will have added security of std nut before it just in case). And will have a fine thread.

Cheers