Gti calipers

[Thatlazypug]

Does anybody know the bosch part number for gti calipers, I'm struggling to find lucas ones so I thought I'd try bosch,thanks for any help

[Anton]

Didn't think there were Bosch 283's fitted to 306s

[MY95]

They didnt, only lucas on the 306 GTI6s, Bosch 283mm were found on the 307s and 206 GTI 180 etc.

[Thatlazypug]

They didnt, only lucas on the 306 GTI6s, Bosch 283mm were found on the 307s and 206 GTI 180 etc.

Ohright, thanks. Will the bosch 283s fit straight onto a 306 or will it have to be a lucas caliper?

[welshpug]

bosch will fit fine with the matching discs.

[Thatlazypug]

bosch will fit fine with the matching discs.

Awesome  do you know the part number at all?

[MY95]

What car are these callipers going on? Unless youve got a big power build the 266mm lucas/bosch callipers with good discs, pads and fluid would be enough.

[Thatlazypug]

What car are these callipers going on? Unless youve got a big power build the 266mm lucas/bosch callipers with good discs, pads and fluid would be enough.

A 306 d turbo, Ive got a gti rear axle for it so I kinda fancy the 284mm brakes to match on the front, I'll be upgrading to cyclones so they should fit

[MY95]

What state of tune? Extra weight which you dont need which slows the car down and causes more unsprung weight. Ive driven both and with good pads there really isnt that much difference.

[cully]

What state of tune? Extra weight which you dont need which slows the car down and causes more unsprung weight. Ive driven both and with good pads there really isnt that much difference.

must be something wrong with your system then as my gti 6 will hang you in the belts compared to my HDI
the 6's brakes are way sharper and a lot better over the HDI

[Thatlazypug]

What state of tune? Extra weight which you dont need which slows the car down and causes more unsprung weight. Ive driven both and with good pads there really isnt that much difference.

Stage 1 tune running 20psi, I'm tempted to use the 307 hdi calipers as there alot cheaper and are still a 284mm rotor and will still fit im told

[Mattcheese31]

Of course 283's are better than 266's, they're bigger lol, yes more weight tis true but with the same pads and discs will stop you quicker

[MY95]

To be honest ive driven a few cars now with GTI6 brakes, and there wasnt much noticeable difference between those and my 266s however my whole brake system is pretty much like new and has been replaced, youd notice the difference after repeated heavy stops but 90% of the time id doubt youd feel much difference, and I thrash my car around and the 266s have been easily good enough, all personal preference though I suppose, and whether or not you track your car. 

But yeah use the 307 setup as much cheaper and does bolt straight on as a whole kit.

[Mattcheese31]

To be honest ive driven a few cars now with GTI6 brakes, and there wasnt much noticeable difference between those and my 266s however my whole brake system is pretty much like new and has been replaced, youd notice the difference after repeated heavy stops but 90% of the time id doubt youd feel much difference, and I thrash my car around and the 266s have been easily good enough, all personal preference though I suppose, and whether or not you track your car. 

But yeah use the 307 setup as much cheaper and does bolt straight on as a whole kit.

i'm not saying the 266's aren't fine with decent pads and discs matey, just the 283's are better, it's not rocket science

[MY95]

I know your saying that, and im not saying they arent better, just said I find very little noticeble difference when generally driving on the roads, but did say they would be better when stopping from high speeds more often just seems a bit pointless until you get a big power 306, as the diesels havent the best gearing for anything above 100 anyway, unless its an S16/GTI6 of course.

[Mattcheese31]

I know your saying that, and im not saying they arent better, just said I find very little noticeble difference when generally driving on the roads, but did say they would be better when stopping from high speeds more often just seems a bit pointless until you get a big power 306, as the diesels havent the best gearing for anything above 100 anyway, unless its an S16/GTI6 of course.

may as well stay with the 247's then

[welshpug]

im running 283mm standard pads and 240 bhp...

[MY95]

Thats 240bhp Mei so completely understandable, but for a slightly tuned XUD id say 266mm would be easily enough.

[Mattcheese31]

Thats 240bhp Mei so completely understandable, but for a slightly tuned XUD id say 266mm would be easily enough.

what are you running? oh 266's? what a surprise

[zx_volcane]

The diff between 266mm and 283mm is super noticeable.

been in a few 306s with stock gti6 callipers, discs and pads that will pretty much stand the car on its nose if desired - as long as everything is working properly its a ridiculous setup.

bargain setup for the price they fetch these days.

[welshpug]

one thing to bear in mind is the price of good pads, Lucas shape are a lot cheaper than Bosch.

[MY95]

Thats 240bhp Mei so completely understandable, but for a slightly tuned XUD id say 266mm would be easily enough.

what are you running? oh 266's? what a surprise

Ive ran both.... no need to be a dick about it though.
Just talking from my own personal experience, yes I found them better, but not by much!
Plus, for the OP's needs, 266s sound like they would do just fine.

[Mattcheese31]

Thats 240bhp Mei so completely understandable, but for a slightly tuned XUD id say 266mm would be easily enough.

what are you running? oh 266's? what a surprise

Ive ran both.... no need to be a dick about it though.
Just talking from my own personal experience, yes I found them better, but not by much!
Plus, for the OP's needs, 266s sound like they would do just fine.

not being a dick thanks, i've ran 247's 266's and 283's, they unsurprisingly stop better the bigger they get

[Piggy]

I found 266s on the 1080kg 206 to be worlds apart from the 283mm setup. And I had good branded 266 pads and cheap 283 pads!
You may also note tha the bosch calipers take a pad which has a smaller surface area iirc

[Mighty306]

The OP asked about Lucas calipers. They were also fitted to a lot of 16v XSi's. All 3 of mine came with Lucas calipers but 266 discs. As far as I know they're the same calipers as went on the GTi-6 but the difference is in the carriers, allowing them to be used with 283 discs. Controversial comment coming (apparently!)....my XSi's with 266 discs feel like they can put the tyres right on the limit of their grip even in the dry. (Admittedly, I don't have great tyres fitted! ?).

I'm sure 283 discs would be even better but how much you would need that in normal use I don't know. 'Bit like mountain bikes ...a 180 front disc will put all but the fattest rider over the bars if grabbed hard enough. They won't perform as well as 203's up front on a long descent though. Real difference then, in my opinion, would be in continued hard use. Also, GTi-6 uses different master cylinder so it's not all about disc diameter.

Having said all that I'm not immune to the 'bigger is better' argument and have fought off the temptation to upgrade to 283 discs more than once!

[Anton]

266's have a 54mm piston, 283'ss have a 57mm

[zx_volcane]

4-pots

There, someone had to say it


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[Mighty306]

266's have a 54mm piston, 283'ss have a 57mm

Ah, didn't realise that. Am sure I'd read somewhere that they were the same but happy to take your word for it.

[Mighty306]

266's have a 54mm piston, 283'ss have a 57mm

Ah, didn't realise that. Am sure I'd read somewhere that they were the same but happy to take your word for it.

The 57mm pistons also explains the difference  in the master cylinders. Cheers for clearing that up.

---

Am slightly hijacking the OP's thread here but any opinions on using the 54mm pistoned calipers with 283 discs?

[Thatlazypug]

Thanks for the info guys!
Main reason I fancied 283mm is I've got a gtI rear axle for my d turbo, and the calipers I can get off a 307 for £17 a side! 
But if good pads and discs are alot cheaper on a 266 I'd go for them, could somebody recommend pads and discs prices for 283 and 266 brakes? 
Would I need to changes the master cylinder?