Brake upgrade

Talk about the E-Type Series 1

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vipergts
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#1 Brake upgrade

Post by vipergts » Sat Apr 10, 2021 3:39 pm

Thinking about changing the front callipers and discs but what set up has worked for you guys??

My std set up atm isn’t great but on the second pump they’re not actually that bad though I’m looking for decent brakes from the first pump.
S1 4.2 Roadster in Resale Red

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mgcjag
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#2 Re: Brake upgrade

Post by mgcjag » Sat Apr 10, 2021 3:46 pm

If they get better by pumping (second pump)....then something is wrong.....probably air in system....Steve
Steve
69 S2 2+2 (just sold) & Building a C type replica

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vipergts
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#3 Re: Brake upgrade

Post by vipergts » Sat Apr 10, 2021 3:59 pm

Agreed though it’s been bled again and again. Plus the pedal is not spongy.
S1 4.2 Roadster in Resale Red

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mgcjag
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#4 Re: Brake upgrade

Post by mgcjag » Sat Apr 10, 2021 5:00 pm

Possibly needs brake overhaul...master/slave/calipers seals etc....Steve
Steve
69 S2 2+2 (just sold) & Building a C type replica

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politeperson
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#5 Re: Brake upgrade

Post by politeperson » Sat Apr 10, 2021 5:13 pm

As Steve says, they may need bleeding.

However, as a heavy brake user, I find changing to a Series 2 set up works for me. No Fade.
James

L.J.K. Setright was right.
"You just cant beat a good E-type"

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Joes66
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#6 Re: Brake upgrade

Post by Joes66 » Sat Apr 10, 2021 7:03 pm

Agreed
Sounds like you need a brake overhaul
You shouldn't have to pump your brakes to make them work better
Joe
1969 series 2 2+2

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keithmac
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#7 Re: Brake upgrade

Post by keithmac » Sun Apr 11, 2021 1:37 am

I did eleven bleeds ( in three different ways ) chasing a soft pedal . Turned out to be faulty brand new piston seals. The last thing I would suspect. They had buckled, requiring two pumps to get pressure. Replaced the front pistons in frustration . problem instantly solved. No more double pump to get a hard pedal, brakes work fine , of course EVERYTHING else in the brake system was replaced in the quest to solve this , including the servo twice ( nothing wrong with the first one ! ) disks, master,lines and rears. Finally found it by making a blanking bolt which I could seal off front or rear brakes to isolate which ones where causing the issue. then used the same bolt to isolate left and right ( was both front ).
Good luck with your quest.
Keith
Early 1967 S1 OTS, 1952 MG TD

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vipergts
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#8 Re: Brake upgrade

Post by vipergts » Sun Apr 11, 2021 11:43 am

Thanks Keith.

Sound like expensive fun ;)
S1 4.2 Roadster in Resale Red

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politeperson
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#9 Re: Brake upgrade

Post by politeperson » Sun Apr 11, 2021 2:29 pm

One think worth check on a servo car.

I had one the other day with terrible bakes. Turned out the vacuum connections on the servo were the wrong way round.

This resulted in a lack of servo assistance up to the point the brake pedal was pressed, then the servo tried to reduce the pressure in the system even more!

It also had a vacuum line leak, sending the idle speed all over the place.

Once this was diagnosed, it was a quick fix, the pedal became firm and full braking returned.

You can tell if your servo is working. Press the brake when you start the car and the pedal should move down a bit and firm up.
James

L.J.K. Setright was right.
"You just cant beat a good E-type"

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vipergts
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#10 Re: Brake upgrade

Post by vipergts » Sun Apr 11, 2021 4:37 pm

Brakes are actually pretty good.

Not the servo but on second pump pedal higher and more efficient
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keithmac
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#11 Re: Brake upgrade

Post by keithmac » Mon Apr 12, 2021 1:47 am

Oh...bye the bye, the caliper bolts were stretched and bottoming out before the caliper was tight against its bracket. ( suspected older aftermarket bolts ) This did not help matters.
Good hunting !
Early 1967 S1 OTS, 1952 MG TD

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