The beasts are fitted.....some crap pics page 15
- Thread starter ncrossy1980
- Start date
By the seaside...
Yeah, but they started it, and that's enough reason for blame where I come from 
In all seriousness, everyone's having a pop at Jonny because... It's Jonny. Loads of people on here have fitted big brake kits and I bet none of them have provoked a thread 8 pages long in so little time. Hopefully Jonny will be getting professionals to fit them who understand the engineering and work with him to get it right. So how about we all just appreciate the beauty of those pieces of mechanical art, and let him get on with it...
In all seriousness, everyone's having a pop at Jonny because... It's Jonny. Loads of people on here have fitted big brake kits and I bet none of them have provoked a thread 8 pages long in so little time. Hopefully Jonny will be getting professionals to fit them who understand the engineering and work with him to get it right. So how about we all just appreciate the beauty of those pieces of mechanical art, and let him get on with it...
PerryGunn said:IAWTP, if you look at the suppliers it appears that, as long as they have a bracket fitment for your car, they will let you select any combination of front and rear sizes you want. There may be some but I haven't seen any sites that sell D2, K Sport etc. as a matched 4 wheel kit only as independent front and rear sets. If you want 380mm rears and 220mm fronts, they'll sell them to you. It's 'buyer beware' and if you choose to fit (or have fitted) mismatched front & rear sets to your car, it's your responsibility to ensure that your car will be safe.Ed Doe said:What a ridiculous thing to say! Jonny has gone to a professional outfit yes - a brake supplier. Someone who wants to sell brakes. "Yes sir, they fit your car". I would imagine the brake components will be warrantied against any mechanical defects, but I highly doubt there would be come-back once they are fitted - particularly if it is a set-up issue. "Oh your car is braking too much at the rear? The brakes are working then - fit a bias valve" will be the response - I'd put money on it. Furthermore there is absolutely no legal or documented evidence to prove categorically that D2 "explicitly confirm that these calipers will work in perfect harmony on Jonny Essex's 2.0 E85 Z4 with the red roof etc.etc.etc.)."sars said:I love reading this stuff and comments made by would be engineers, I get them all day at work and whilst it sometimes gets frustrating with some really interesting questions (and for the record there are no such thing as a stupid question) I try and answer/educate when ever I can.
But seriously guys, Jonny has gone to a professional outfit, told them what he has and they have given him what they believe, in their professional opinion, what he needs. It's not like he's (jonny) gone down to the pub and picked up some dodgy brake parts from bodget and scarper and you're wondering if the master cylinder is big enough
So get real, we are talking brakes, do you honestly believe a professional outfit, an American manufacturer with TUV ISO 9001 certification, would supply an aftermarket kit that could possibly kill someone without making sure it is fit for purpose.
They have told Jonny that the calipers fit and work. They will. It will naturally fall to Jonny himself, or to the unfortunate company lumbered with fitting them and setting them up for Jonny to fit a bias valve to get the brake bias to a usable balance front/rear - let alone back to OEM balance.
It is extremely likely the company will be used to dealing mostly with people who are tracking their cars and have reached the limits of their OEM brake set-up. These people will be resonably clued up on brake balance, and cruicially prepared to do their homework, and fiddle to get the best out of the set-up. Not just bung them on and hope for the best....
I'm afraid I don't care what anyone has told Jonny to date, I'll state now for the record; those brakes once fitted are going to cause the rear of the car to be massively over-braked - in my opinion to a quite alarming, and potentially dangerous degree - without a bias valve and someone who knows what they're doing to set it up.
Isn't the crucial question here "what the f*** does IAWTP stand for Perry"? :scratchhead:
Yes people have fitted BBKs, I don't think people are having a go at Jonny just trying to make him understand that putting the same size rotors front and rear may not be the most sensible thingBing said:Yeah, but they started it, and that's enough reason for blame where I come from
In all seriousness, everyone's having a pop at Jonny because... It's Jonny. Loads of people on here have fitted big brake kits and I bet none of them have provoked a thread 8 pages long in so little time. Hopefully Jonny will be getting professionals to fit them who understand the engineering and work with him to get it right. So how about we all just appreciate the beauty of those pieces of mechanical art, and let him get on with it...
And, from what he's said, he's not getting professionals to fit them...
PerryGunn said:
Okay, I take that back, just read he's doing it himself. Feck me, I wouldn't, even if I knew how. This is serious engineering after all, not just new pads and hoses...
Though I do think hat for some reason people just like having a pop at Jonny...
Ed Doe, first of all thanks for the research, what you have copied is spot on, however it is a generalisation and the actual problem is more complex than written, it's dumbed down for the internet. The problem with generalisation is that by its very nature it is unspecific, brake bias is fundamentally calculated from the centre of mass of the vehicle, as we all know this changes with acceleration, so for road use designers will stick to a pretty large margin of safety given the infinite variability of the road and car, for racing cars it becomes track specific (in F1 they even change brake bias through the lap).
I have no idea of the % bias of Jonny's zed, I would bargain no one here does, but I guarentee the manufacturers of these brake products will have done their math and will recommend something suitable, at the end of the day Jonny asked and they told, they ARE culpable
I have no idea of the % bias of Jonny's zed, I would bargain no one here does, but I guarentee the manufacturers of these brake products will have done their math and will recommend something suitable, at the end of the day Jonny asked and they told, they ARE culpable
Bing said:
I don't think people have been having a pop at him on this thread. I've only seen one stupid comment so far. Few questions have been raised but on the whole its all been positive. One thing for sure everybody thinks the brakes look epic and they are not even on the car yet...
sars said:
Im afraid the brake manufacturer would not be to blame if something went wrong... There are way to many steps between supply and and an "incident"..
Getting efficient and balanced braking is not an easy task when you upgrade to aftermarket parts..
Can you put it all on and it will work.....yes of course...
Will it work safely and correctly...? To many variables to tell....Increasing disc and caliper piston sizes throws up a whole bag of variables....
PerryGunn said:
i run 370 x 32mm front and 328 x 28 mm rear, my calipers are the larger AP callipers ( cp5555) setups that run a thicker pad. They later made some changes so they work with stock wheels. i was lucky enough to get one of the first bigger setups used on this very forum many years ago now with only 500 miles on them... i run track compounds front and rear.
Still to this day look perfect after some serious workouts, braking FEEL is much better but i wouldn't say actual braking is better really until you keep using them, ( they are with semi slicks on) they just allow me to keep using them alot longer than the stock setup as they can deal with more heat. I do love how consistent they are, and as said before the pedal feel is wonderful.
CornishRob
Senior member
Are the rotors fixed or floaters?
How do the aftermarket kits decide if they use fixed or floaters?
How do the aftermarket kits decide if they use fixed or floaters?