Dual circuit master cylinder

[gpi]

viewtopic.php?f=11&t=20350&start=330#p224445

[mph]

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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[Devilrod]

Has anyone looked into running a side offset hk booster in their fb ek

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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 ..

[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

[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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[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.



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..

[Devilrod]

And these are two setups friends are running on there EK and FB







Both have modified hinges to clear.

[Devilrod]

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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[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

[mph]

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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[mph]

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.



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..

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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[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

[Devilrod]

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.

[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.



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..

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.

[mph]

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.



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..

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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