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Re: Dual circuit master cylinder

Posted: Thu Oct 22, 2020 7:08 am
by gpi

Re: Dual circuit master cylinder

Posted: Tue Oct 27, 2020 3:41 am
by mph
gpi wrote:
Harv wrote: Mon Dec 19, 2016 3:50 pm
Errol62 wrote:CRS used to supply an adaptor to bolt up HQ drum brake dual circuit master cylinder to FE - HR.
Interesting... hadn't seen that one before. CRS now advertise an adaptor for HQ master to EJ/EH: http://www.rodshop.com.au/holden/fb-ek/ ... aptor.html. They list it on the FE/FC, FB/EK and EJ/EH pages... wonder if it fits FB/EKs too?

Cheers,
Harv
doesnt fit fb ek due to the bumps in the firewall. i milled it down to fit.
might cast a few considering its nothing like how i originally bought it.
What part did you mill down to make it fit , the fire wall lump or the adapter

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Dual circuit master cylinder

Posted: Sun Jul 18, 2021 12:29 pm
by Devilrod
mph wrote:Has anyone looked into running a side offset hk booster in their fb ekImage

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That’s the bracket I spent the whole of yesterday pulling stuff of shelves to find it not where I thought I’d put it…. Trev got me one now I need to work out what I’m going to do because I can’t remember shit of any of the setup ..ImageImage

Re: Dual circuit master cylinder

Posted: Sun Jul 18, 2021 12:45 pm
by Errol62
Couple guys I know used XD XE XF dual circuit boosters. No clearance issues to bonnet hinges and work well.


FB ute fixer upper, EK van on rotisserie

Re: Dual circuit master cylinder

Posted: Sun Jul 18, 2021 5:33 pm
by mph
Only yesterday i was researching boosters again hoping to do it when my motors out.
I was thinking about this and looking at getting a spacer milled up from 2 bolts on the fire wall to space out about 1" and suit 4 bolts on the booster. Similar to the ej ejh one on the crs website.
https://www.ebay.com.au/itm/7-Dual-BLAC ... 632-2357-0


Or that hk would be adaptable but seem to be $600 plus then you have to get the booster serviced and master cyl as well.

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Re: Dual circuit master cylinder

Posted: Sun Jul 18, 2021 10:53 pm
by Devilrod
Yeah I went down the rabbit hole today. Bonnet hinge clearance is the issue. Although I think with some pruning it may clear the spring.

Image

But I did also find this on eBay which got me thinking a) is it any good- will need to research it a bit more and b) it may clear the hinge..

Image

Re: Dual circuit master cylinder

Posted: Sun Jul 18, 2021 10:56 pm
by Devilrod
And these are two setups friends are running on there EK and FB

Image

Image

Image

Both have modified hinges to clear.

Re: Dual circuit master cylinder

Posted: Sun Jul 18, 2021 10:58 pm
by Devilrod
Errol62 wrote:Couple guys I know used XD XE XF dual circuit boosters. No clearance issues to bonnet hinges and work well.


FB ute fixer upper, EK van on rotisserie
So is that a direct mount on the firewall or an adaptor or just redrilled firewall? Interested to see some pics of the setup if you can get some.


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Re: Dual circuit master cylinder

Posted: Sun Jul 18, 2021 11:26 pm
by Errol62
Direct to firewall and seem to be in line with firewall grommet. Cars are both autos. Very neat install.


FB ute fixer upper, EK van on rotisserie

Re: Dual circuit master cylinder

Posted: Mon Jul 19, 2021 1:46 pm
by mph
Errol62 wrote:Direct to firewall and seem to be in line with firewall grommet. Cars are both autos. Very neat install.


FB ute fixer upper, EK van on rotisserie
So two bolts top and bottom to the &*#@ booster then the &*#@ dual master cyl

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Re: Dual circuit master cylinder

Posted: Mon Jul 19, 2021 1:50 pm
by mph
Devilrod wrote:Yeah I went down the rabbit hole today. Bonnet hinge clearance is the issue. Although I think with some pruning it may clear the spring.

Image

But I did also find this on eBay which got me thinking a) is it any good- will need to research it a bit more and b) it may clear the hinge..

Image
Did you mod the fire wall with the ribs in it or space the bracket out off the ribs. ?
How many fixing bolts on the hk bracket to the fire wall do the bolts go through and just into the firewall steel or into the brake and clutch bracket under dash for a firmer fix ? Do you know what the second mates booster is , looks to skinny to be a hk booster ?

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Re: Dual circuit master cylinder

Posted: Mon Jul 19, 2021 1:55 pm
by Blacky
looks like a Chinese knock off - they can be a crapshoot , I got mine from Brodie its an American made one, looks similar but twice the price

Re: Dual circuit master cylinder

Posted: Mon Jul 19, 2021 6:15 pm
by Devilrod
Blacky wrote:looks like a Chinese knock off - they can be a crapshoot , I got mine from Brodie its an American made one, looks similar but twice the price
That’s what I’m thinking too…. A mate a work is trying to find the details of a local (to me) guy who he got his off. Not a cheap knock off. So I’ll keep you all updated.

Re: Dual circuit master cylinder

Posted: Mon Jul 19, 2021 6:19 pm
by Devilrod
mph wrote:
Devilrod wrote:Yeah I went down the rabbit hole today. Bonnet hinge clearance is the issue. Although I think with some pruning it may clear the spring.

Image

But I did also find this on eBay which got me thinking a) is it any good- will need to research it a bit more and b) it may clear the hinge..

Image
Did you mod the fire wall with the ribs in it or space the bracket out off the ribs. ?
How many fixing bolts on the hk bracket to the fire wall do the bolts go through and just into the firewall steel or into the brake and clutch bracket under dash for a firmer fix ? Do you know what the second mates booster is , looks to skinny to be a hk booster ?

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So far only mod was to pull the loom holder. Will need to redrill holes to line up with existing factory ones as only one bolt lines up. As for the ridge I may notch the back of the bracket to clear. Not sure yet.

Slimmer booster we believe to be HT/HG.

Re: Dual circuit master cylinder

Posted: Mon Jul 19, 2021 8:46 pm
by mph
Devilrod wrote:
mph wrote:
Devilrod wrote:Yeah I went down the rabbit hole today. Bonnet hinge clearance is the issue. Although I think with some pruning it may clear the spring.

Image

But I did also find this on eBay which got me thinking a) is it any good- will need to research it a bit more and b) it may clear the hinge..

Image
Did you mod the fire wall with the ribs in it or space the bracket out off the ribs. ?
How many fixing bolts on the hk bracket to the fire wall do the bolts go through and just into the firewall steel or into the brake and clutch bracket under dash for a firmer fix ? Do you know what the second mates booster is , looks to skinny to be a hk booster ?

Sent from my SM-G970F using Tapatalk
So far only mod was to pull the loom holder. Will need to redrill holes to line up with existing factory ones as only one bolt lines up. As for the ridge I may notch the back of the bracket to clear. Not sure yet.

Slimmer booster we believe to be HT/HG.
Nice one dr , it looks like the go could probably also use the clutch cylinder bolt holes in the firewall seems im running a auto.

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