Electric brake booster

[colr6]

Has anyone used the electric brake booster off say Sierra/ Granada ? Got nowhere to put normal remote servo, apart from the boot!! When I fitted a remote servo on the Anglebox it suffered with a slight delay before working and TBH it was a bit unnerving. So thought of going electric. Any suggestions or advise welcomed.

[Kenbex522]

Wasn't aware Ford were fitting electric boosters to Sierra's and Grannies. Some had motorised ABS units but not brake boosters/servos I'm sure. I fitted a rebuilt remote Girling unit to my Corsair beginning of the year, certainly no delay with that. After the recent Lakes Tour i'm glad I did fit it!!

[colr6]

6 hours ago, Kenbex522 said:

Wasn't aware Ford were fitting electric boosters to Sierra's and Grannies. Some had motorised ABS units but not brake boosters/servos I'm sure. I fitted a rebuilt remote Girling unit to my Corsair beginning of the year, certainly no delay with that. After the recent Lakes Tour i'm glad I did fit it!!

I may have interpreted the wrong way then on the way this thing works, the problem I have now is with running turbo you won't have vacumn when on boost. This is the reason for looking at alternative methods. On my Anglebox I used a new servo off mgb and got the results of a slight delay, another member also had the same problem. So could be an incorrect matching that may be the cause of the problem.

[katana]

Who brakes when on boost? Off the throttle and vacuum is pretty much instant for a servo. If the bay is full, can't you get a remote under the dash?

[colr6]

Under the dash is full, not a great deal of space under rear seat so only leaves the boot. Suppose I could run 10mm copper pipe under the car for a supply of vac. So going along those lines of remote, is there a way of calculating correct servo size?

[Kenbex522]

You can buy little motorised vac motors I'm sure. I thought I'd read about someone doing this recently but cant remember where I saw it. As all remote servos detect fluid pressure before reacting, is it possible there was still a bit of air trapped in the system. Was it a proper Lockheed or a chinese copy servo? dont think the copies are all that from what I've heard. I know some of the Anglia boys have mounted theirs in the wheel arch with suitable cover over it, another where the glove box sits. I know of another who has three in the boot. Two for brakes and one for clutch!

[colr6]

I suspect if may have been a cheepo, got it from MG hive about £70. I even went to supplying two vac pipes assuming there wasn't enough from one carb runner, but to no avail ! Might have to go under the bed and get some cash out and try and purchase a real one....lol I thought I'd seen someone on here using the Sierra/ Granada set up but couldn't find it! Sure it was john mk1 v6 but had a look through his threads but a no go.

[Kenbex522]

Car builder solutions sell real remote boosters/servos not sure if they have any stock of the smaller 5.5" one, they didn't when i needed one. Hence why I had to bite the bullet and get a rebuilt Girling unit.  I'm really not sold on those Lockheed copies, and MG Hive do sell the copies, they're only a few miles from me.

[DT36]

Thinking a little outside the box here, Col:

Do any of the trucks you work on have a small accumulator like the Rexroth diaphragm bell type, maybe for a hydraulic circuit or emergency brake/trailer reserve?

If so, do you think you could plumb one in to overcome the delay and assist in faster re-fill.

[Danish]

When I was looking at changing from a standard Ford master cylinder with servo to bias pedal box, the guy who was going to do the work suggested an electric booster for the front circuit only - to replace the vacuum servo and help with front/rear bias.

The other idea we had was to change to a Transit turbo diesel alternator which has a vacuum pump on the rear for running the brakes.

I haven't actually done any changes yet though, so can't give any more info.

 

[katana]

1 hour ago, Danish said:

The other idea we had was to change to a Transit turbo diesel alternator which has a vacuum pump on the rear for running the brakes.

That was going to be my next suggestion - got to be worth some consideration? I'm guessing most diesel engined cars will have something similar?