Inboard brakes
Author
Discussion

Mr Gear

Original Poster:

9,416 posts

219 months

Thursday 23rd September 2010
quotequote all
Why don't any cars have them?

Advantages are lower unsprung weight and no compromise on wheel size.

Disadvantages are...?

DrTre

12,957 posts

261 months

Thursday 23rd September 2010
quotequote all
difficulty in maintenance on a component that will need changing?

AndrewW-G

11,968 posts

246 months

Thursday 23rd September 2010
quotequote all
Increased time and therefore cost to replace / service, increased intrusion into useable space and heat dissipation issues

TheRoadWarrior

1,242 posts

207 months

Thursday 23rd September 2010
quotequote all
Disadvantages?

What ever you do... don't break a drive shaft.

slomax

7,257 posts

221 months

Thursday 23rd September 2010
quotequote all
2cv has them.

Difficulties, changing the disks, if the engine has a problem, the disks get covered in oil, meaning its pretty tricky to stop.

To change the disks you have to remove the drive shafts, which means either removing the engine and gearbox, or removing the hubs.

Otherwise, they are pretty good.

wink

Mr Gear

Original Poster:

9,416 posts

219 months

Thursday 23rd September 2010
quotequote all
Fair enough.

Mr Gear

Original Poster:

9,416 posts

219 months

Thursday 23rd September 2010
quotequote all
Some of the strengthening you'd have to do would likely offset any unspung weight advantages I guess.

pugwash4x4

7,679 posts

250 months

Thursday 23rd September 2010
quotequote all
didn't a lot of mid-80s jags have inboard brakes?

trickywoo

14,143 posts

259 months

Thursday 23rd September 2010
quotequote all
Lotus 11 has inboard brakes (at the back at least).

MadRob6

3,594 posts

249 months

Thursday 23rd September 2010
quotequote all
Lotus Esprit has inboard rear brakes I believe.

fatboy b

9,665 posts

245 months

Thursday 23rd September 2010
quotequote all
doogz said:
On modern FWD cars, where are you going to put them exactly?
Didn't Alfasud's have inboard front discs and front wheel drive?

TubbyRutter

2,086 posts

235 months

Thursday 23rd September 2010
quotequote all
Alfa 75 has inboard brakes too.

Engineer1

10,486 posts

238 months

Thursday 23rd September 2010
quotequote all
A pig to check a known wear component, you can see through the wheel for a quick check and take the wheel off for a thorough check inboard it will be difficult.

Beyond Rational

3,544 posts

244 months

Thursday 23rd September 2010
quotequote all
pugwash4x4 said:
didn't a lot of mid-80s jags have inboard brakes?
Yep, the XJS did up until 1994.


CraigyMc

18,369 posts

265 months

Thursday 23rd September 2010
quotequote all
Mr Gear said:
Disadvantages are...?
Lots of Lotus racing cars had them, and lots of Lotus racing cars crashed when they failed?

You don't screw about with relibility and brakes.

C

Alex

9,978 posts

313 months

Thursday 23rd September 2010
quotequote all
Cooling is an issue.

My GTV6 has inboard brakes on the rear. They are a bugger to change.

williamp

20,388 posts

302 months

Thursday 23rd September 2010
quotequote all
My old Aston had them at the rear. They were located next to the diff, before the drivestafts took the power to wheels.

So, apart from the heat build up which was known for damaging the seals on the diff, this is wat you had to do to change the pads:

1) Remove rear seats. Seat and squab
2) Open access panel- 12 (?) bolts
3) You can now see the brake calipers. With the thin fingers of a child, but with the strength of an adult, remove the rusted split pins. Then the rusted rods
Then simply pull the pads out towards you.

Removing the caliper was not much harder. But to change the discs was a real pain which most of the rear suspension had to be removed...so most Aston owners didnt bother...meaning high bills for those of us who were restoring it and wnated the car to be right...or shallI say safe

In short, more trouble then its worth.

abarth130

257 posts

229 months

Thursday 23rd September 2010
quotequote all
My Alfa 75 3.0 had them and I don't think I've sworn so much in my life than when I had to change them.


richw_82

992 posts

215 months

Thursday 23rd September 2010
quotequote all
pugwash4x4 said:
didn't a lot of mid-80s jags have inboard brakes?
E-type through to DS420 Limo/Hearse. Bloody handbrake pads... irked


cccscotland

418 posts

283 months

Thursday 23rd September 2010
quotequote all
williamp said:
My old Aston had them at the rear. They were located next to the diff, before the drivestafts took the power to wheels.

So, apart from the heat build up which was known for damaging the seals on the diff, this is wat you had to do to change the pads:

1) Remove rear seats. Seat and squab
2) Open access panel- 12 (?) bolts
3) You can now see the brake calipers. With the thin fingers of a child, but with the strength of an adult, remove the rusted split pins. Then the rusted rods
Then simply pull the pads out towards you.

Removing the caliper was not much harder. But to change the discs was a real pain which most of the rear suspension had to be removed...so most Aston owners didnt bother...meaning high bills for those of us who were restoring it and wnated the car to be right...or shallI say safe

In short, more trouble then its worth.
You were lucky. Ours didn't have the access panel. Needed to drop the diff to change the pads - about 1 week solid labour.

Edited by cccscotland on Thursday 23 September 15:35