rear drum to disc conversion

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pkronic
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rear drum to disc conversion

#1 Post by pkronic » Thu Feb 08, 2018 5:47 pm

as title says i wanna convert to all round discs as i will be increasing the power of my car and sooner or later will be going to track days so i want to get discs on the back for better brake cooling anyway has anyone got any ideas what cars rear calipers and everything will fit? also will i be able to get a unit that bolts straight on or will i need to source source conversion plates for the caliper carrier to bolt to?

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1234dist
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Re: rear drum to disc conversion

#2 Post by 1234dist » Thu Feb 08, 2018 6:06 pm

oh the pain for such little increase in braking power.

Saying that, it looks better. But the calipers seize and the cables stretch ect.

So, on to what you need, basically the back end of a vvc coupe or turbo.

you will need:

rear trailing arms
hand brake cables
calipers
discs & pads
rear brake pipes

Your handbrake will suck, but it will look pretty and this coming from the guy who used all new kit. If you want i'll link to the section of my blog when i did it to my cabby.
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pkronic
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Re: rear drum to disc conversion

#3 Post by pkronic » Thu Feb 08, 2018 6:36 pm

yhh that would be call and its not for looks or power so much just when ive been to track days in cars with drums once they get hot they arnt effective where as discs cool off faster due to not being enclosed

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1234dist
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Re: rear drum to disc conversion

#4 Post by 1234dist » Thu Feb 08, 2018 6:58 pm

your call :laughing2

i think they look pretty, not arsed how they work :laughing2

http://218vvccabriolet.blogspot.co.uk/2 ... rsion.html
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
220 GTI M-series J777RAL
75 2.0 CDT P80CJM
620 SLI P267LOM HONDA
420 GSI Turbo L191CVP

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ROVER-25X
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Re: rear drum to disc conversion

#5 Post by ROVER-25X » Thu Feb 08, 2018 8:10 pm

Do this, looks pretty, nuff sed ! :laughing2 :tt2 :slapme



Image
The 25X (2001 ROVER 25 1.4 Impression S, fate TBD)
The CX8 (1997 ROVER Cabriolet 1.6 K-Series, Resto Project)
The 25XD (2004 ROVER 25 2.0TD, Track Car ?)
The Parts Bin (2001 ROVER 25 1.6 S)
The ASTRA-DX (2012 VAUXHALL ASTRA 1.7CDTi, Daily Eco Driver)

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Johnny 216GSi
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Re: rear drum to disc conversion

#6 Post by Johnny 216GSi » Thu Feb 08, 2018 8:15 pm

In theory at least, the trailing arms can stay but you need disc spindles. I assume these come with the calliper carrier mount points, etc.

But as Dist said, everything has to be sourced - nothing is common between drum and disc brakes.
Rover 216GSi K reg. Flame Red over Tempest Grey

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1234dist
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Re: rear drum to disc conversion

#7 Post by 1234dist » Thu Feb 08, 2018 8:17 pm

you can't use use the drum arms at all, there are no additional holes for holding the caliper carriers or anything.

As per my blog post i pulled them apart hoping to be able to keep them but nothing was usable.
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
220 GTI M-series J777RAL
75 2.0 CDT P80CJM
620 SLI P267LOM HONDA
420 GSI Turbo L191CVP

JOHNDQ
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Re: rear drum to disc conversion

#8 Post by JOHNDQ » Thu Feb 08, 2018 8:18 pm

Get the discs on and move away from the 1980's :laughing2 Just find a ZS 180 breaking and get everything you need

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Johnny 216GSi
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Re: rear drum to disc conversion

#9 Post by Johnny 216GSi » Thu Feb 08, 2018 8:21 pm

1234dist wrote:
Thu Feb 08, 2018 6:06 pm
Your handbrake will suck...
Why does the handbrake suck? Just curious...
Rover 216GSi K reg. Flame Red over Tempest Grey

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Re: rear drum to disc conversion

#10 Post by 1234dist » Thu Feb 08, 2018 8:27 pm

It just doesn't bite nearly as tight as the drum did (based on my cabby).

Still more than enough but i bet i could have done a handbrake turn on drums, no chance on the discs and all mine where new kit, caliper, pad, disc and handbrake cable.
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
220 GTI M-series J777RAL
75 2.0 CDT P80CJM
620 SLI P267LOM HONDA
420 GSI Turbo L191CVP

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ROVER-25X
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Re: rear drum to disc conversion

#11 Post by ROVER-25X » Thu Feb 08, 2018 8:31 pm

Had rear discs on my Mk6 Escort Cabby, my Vecrtra, Mondeo and MGF, the handbrakes were rubbish, never had any issues
with the drums on my 25 and Cabby plus many others.

Handbrake on my Astra with rear discs is good though.
The 25X (2001 ROVER 25 1.4 Impression S, fate TBD)
The CX8 (1997 ROVER Cabriolet 1.6 K-Series, Resto Project)
The 25XD (2004 ROVER 25 2.0TD, Track Car ?)
The Parts Bin (2001 ROVER 25 1.6 S)
The ASTRA-DX (2012 VAUXHALL ASTRA 1.7CDTi, Daily Eco Driver)

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Johnny 216GSi
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Re: rear drum to disc conversion

#12 Post by Johnny 216GSi » Thu Feb 08, 2018 9:30 pm

1234dist wrote:
Thu Feb 08, 2018 8:27 pm
It just doesn't bite nearly as tight as the drum did (based on my cabby).

Still more than enough but i bet i could have done a handbrake turn on drums, no chance on the discs and all mine where new kit, caliper, pad, disc and handbrake cable.
How does the cable do it's job? On the drums you've got the cylinder at the top and the handbrake cable pulls the shoes in at the bottom.

On discs, you've only got the callipers. Does it mechanically pull the two pads together just like the calliper does?
Rover 216GSi K reg. Flame Red over Tempest Grey

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1234dist
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Re: rear drum to disc conversion

#13 Post by 1234dist » Thu Feb 08, 2018 9:34 pm

basically this
Image

Image

Image

The drip tray was oil, coolant and brake fluid mixed.....yummy
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
220 GTI M-series J777RAL
75 2.0 CDT P80CJM
620 SLI P267LOM HONDA
420 GSI Turbo L191CVP

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1234dist
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Re: rear drum to disc conversion

#14 Post by 1234dist » Thu Feb 08, 2018 9:35 pm

you can also see in the last pic that there are no holes for the calipers to attach
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
220 GTI M-series J777RAL
75 2.0 CDT P80CJM
620 SLI P267LOM HONDA
420 GSI Turbo L191CVP

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ROVER-25X
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Re: rear drum to disc conversion

#15 Post by ROVER-25X » Thu Feb 08, 2018 9:51 pm

K-Series Mayo with a drizzle of Brake Fluid and some brick for texture, that's as good as the food gets at Castle Dist. :laughing2
The 25X (2001 ROVER 25 1.4 Impression S, fate TBD)
The CX8 (1997 ROVER Cabriolet 1.6 K-Series, Resto Project)
The 25XD (2004 ROVER 25 2.0TD, Track Car ?)
The Parts Bin (2001 ROVER 25 1.6 S)
The ASTRA-DX (2012 VAUXHALL ASTRA 1.7CDTi, Daily Eco Driver)

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