AP racing calipers

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Bigfootmgf
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Re: AP racing calipers

Post by Bigfootmgf » Mon Jul 10, 2017 6:43 pm

Sorry still early days only had on about a year done about 6000 so far! 10% warn I think!
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beefio
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Re: AP racing calipers

Post by beefio » Mon Jul 10, 2017 9:00 pm

Good, they last then!

Think I'll get some and give them a go...

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Rob Bell
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Re: AP racing calipers

Post by Rob Bell » Mon Jul 17, 2017 5:05 pm

The AP 2-pots should give exactly the same braking performance as the 4-pot calipers. The reason why calipers may have multiple pistons (4, 6 or even 8!) is about maintaining brake-pad stability and an even pressure over the whole pad against the brake disc.

Under heavy usage pads can squirm a little, and the leading edge may start to wear faster than the trailing edge, leading to edging of the pad. Multi-piston calipers overcome this problem to a large extent - but is never a problem for road use on a car as light as the MGF or with its relatively modest power output.

MG Rover decided that two pots were the way forward for the 2005MY MGTF - and actually they were right.

For a more track-centric car, four pots may start to make more sense. :)

FWIW Project Shed is still using standard Lucas-Girling single-pot sliding calipers with Yellow-stuff pads. No major concerns ;)

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Re: AP racing calipers

Post by beefio » Mon Jul 17, 2017 5:36 pm

Very good to hear thanks Rob!

I've just brought a set of new front and rear yellow stuff pads on eBay for £50 so will let you know how I get on with them...

Rob - what discs would you recommend using with the yellow stuff pads?

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Rob Bell
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Re: AP racing calipers

Post by Rob Bell » Wed Jul 19, 2017 2:18 pm

EBC do nice quality grooved discs, which would be my choice here :)

beefio
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Re: AP racing calipers

Post by beefio » Wed Jul 19, 2017 2:32 pm

Ok thanks.

Would the EBC groved discs be better than the original MG/Rover discs, of which I have a new set in the loft?

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Rob Bell
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Re: AP racing calipers

Post by Rob Bell » Wed Jul 19, 2017 2:43 pm

I like grooved discs because they help clear glazing off the pads - which I used to get a lot of on my MGF (which used to get driven a lot around the city).

Other than that, standard OEM discs are absolutely fine. :)

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Re: AP racing calipers

Post by beefio » Wed Aug 02, 2017 11:14 am

Just got a nice new set of 4 pots for £180 delivered which I thought was ok.

Now I need to get a set of Hairpin wheels to fit them under!
IMG_4889.JPG

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Bigfootmgf
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Re: AP racing calipers

Post by Bigfootmgf » Wed Aug 02, 2017 12:30 pm

Hairpins will still need spacers
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Mikeadman
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Re: AP racing calipers

Post by Mikeadman » Wed Aug 02, 2017 12:41 pm

Nice V Spokes Fit thats what I fitted on my MGTF

Cheers

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beefio
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Re: AP racing calipers

Post by beefio » Wed Aug 02, 2017 12:58 pm

Bigfootmgf wrote:Hairpins will still need spacers
So I've read, whats the minimum you can get away with?

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Re: AP racing calipers

Post by Bigfootmgf » Wed Aug 02, 2017 11:01 pm

To be honest I haven't done it but from memory I think people have said 5mm! I could be wrong though! Best to get direct fit wheels that don't need spacers. E.g. Trophy, tf160 wheels or other 16" wheels that fit over ap brakes
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beefio
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Re: AP racing calipers

Post by beefio » Thu Aug 03, 2017 6:44 am

Think I read the same.

I like the hairpins and I'd be happy to have some small spacers.

Not many Trophy wheels around and I wouldn't put TF wheels on my F.

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Re: AP racing calipers

Post by Plezier » Sun Aug 06, 2017 5:35 pm

When I fitted the 4 pots to "Elsie" my 97 VVC using washers I found that 2.8mm was the minimum t clear. Thought that was askign fro bother so wanted to go 4mm but ould not find any but 5mm spacers were easily available so used those with no problems.

When it came to fitting the new 2 pots to the 75th I just bought some 5 mm spacers an again have had no problems. The AP calipers do require longer bolts though.

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Re: AP racing calipers

Post by big angus » Mon Aug 28, 2017 8:06 pm

Bigfootmgf wrote:Not wanting to upset anyone but standard size discs and high spec brake pads are good for track days but the ap's 4pots look quite good tho!
I've just removed the 4 pots and 304mm discs from my sprint car to fit 15in wheels and fitted 240mm grooved and drilled EBC discs with std sliding calipers and Yellow Stuff pads. Was happy with the performance at a test day at Kames Sprint Track on Sunday.

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