4 pot rear brake conversion

4.2 V8 32v Naturally Aspirated - 414 bhp
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Rick_RS4
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4 pot rear brake conversion

Post by Rick_RS4 » Tue Jun 04, 2019 12:06 pm

20190526_175526.jpg
I've just fitted the R8/Lamborghini 4 pot rear brakes and spot caliper to my B7 , I know theres a few people on here with the BBK on the rear and wondered what the pedal feel was like.

On mine biting and stopping is awesome but the pedal travel until bite is a little more than i thought it would be .

Maybe i haven't bled them correctly or possibly need a larger mastercylinder. I've not read of any complaints so wondered if it was a problem my end .

Cheers

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MikeFish
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Re: 4 pot rear brake conversion

Post by MikeFish » Tue Jun 04, 2019 8:16 pm

Looks cool Rick. I haven't done the conversion so can't really answer but when the brakes on my C7 were changed they pedal became spongier even though the garage re-bled them. After a few weeks they went back to normal. I assume it was a bit of air trapped somewhere and eventually just worked it's way out.

Rick_RS4
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Re: 4 pot rear brake conversion

Post by Rick_RS4 » Tue Jun 04, 2019 9:21 pm

Thanks Mike, re painting the fronts now, full strip down and re finish. Ah I've read they get air trapped and you should take the caliper off and twist it round to try to work any air loose.

Once the fronts are on I'll re bleed the whole system again and see what happens .

MattboyR32
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Re: 4 pot rear brake conversion

Post by MattboyR32 » Sun Jun 09, 2019 8:49 am

Where did u source the brakes and conversion kit if you don’t mind me asking?


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Rick_RS4
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Re: 4 pot rear brake conversion

Post by Rick_RS4 » Sun Jun 16, 2019 1:02 am

I've been looking on Ebay mainly for the calipers etc, the pads and disks are new

AA_954
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Re: 4 pot rear brake conversion

Post by AA_954 » Sun Jun 16, 2019 5:59 am

MattboyR32 wrote:Where did u source the brakes and conversion kit if you don’t mind me asking?


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If you’re looking for a decent kit that is already put together for the B7 I would check voshmods.com , thats where I bought mine.


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Rick_RS4
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Re: 4 pot rear brake conversion

Post by Rick_RS4 » Wed Jul 31, 2019 9:27 pm

Sorted this I needed to bleed the abs with VCDS all good now brakes are awesome now

George
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Re: 4 pot rear brake conversion

Post by George » Thu Aug 01, 2019 4:30 pm

Did you get the longer pedal travel sorted? it is normal because the area of the 4 pistons is much more than the area of the single piston caliper. If it is a problem you may need to change the master cylinder.

Rick_RS4
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Re: 4 pot rear brake conversion

Post by Rick_RS4 » Thu Aug 01, 2019 8:59 pm

George wrote:
Thu Aug 01, 2019 4:30 pm
Did you get the longer pedal travel sorted? it is normal because the area of the 4 pistons is much more than the area of the single piston caliper. If it is a problem you may need to change the master cylinder.
Yes I did thanks. Just bled the abs and it's like like oem feel

George
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Re: 4 pot rear brake conversion

Post by George » Fri Aug 02, 2019 8:21 am

Yes, indeed! One more thing - on the 4 pot calipers you have two bleeder nipples on each caliper, not one, you have to bleed both of them!!!
Start from the internal one and after this you do the external.

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