Anyone fitted the Alfaholics Dual master brake box - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 8 (permalink) Old 09-08-2018, 05:47 AM Thread Starter
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Anyone fitted the Alfaholics Dual master brake box

https://www.alfaholics.com/race-part...-machined-118/

Trying to see how people have got on with it and whether they have just done the drake box or calipers also.

Do you need a servo still?

Thx
Chris
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post #2 of 8 (permalink) Old 09-09-2018, 07:26 AM
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No experience with the Alfaholics setup specifically, but I do run a Tilton dual master setup. These do not use a booster (and indeed cannot). They will work with stock, but I found the boosterless setup felt much nicer with the 6 pot setup from Alfaholics.

The real advantage of this setup is being able to fine tune bias along with redundancy in the brake setup given that you have two completely independent brake systems front and rear.

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post #3 of 8 (permalink) Old 09-09-2018, 08:30 AM
I've installed the LHD version. Pretty straightforward. I'll dig out some pictures and post. AH has a cable that provides brake bias adjustment which I think is necessary with standing pedals. For some reason it's not listed on their website but if you ask...

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post #4 of 8 (permalink) Old 09-13-2018, 09:19 AM
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.

I have installed one on my car (73 GTV. tipo 105.22. RHD)

It is excellent!

I have been using un-servoed brakes for many years & when my original MC failed, the Alfaholics setup seemed like a logical replacement...

I run Wilwood 4 pot calipers on the front (4 x 1.38" piston) with 11" x .81" Discs, and standard calipers on the rear.


Bear in mind - it is not a '5 minute' install. You will need some new brake lines, and a brake flare tool to make them. (you will be removing your servo)

I recommend 'speed bleeders' for your calipers, - in order to bleed the brakes you ideally need to do all 4 calipers at once.

I also had to grind a small amount of material from the clevis as it limited brake pedal travel. (but that was a minor issue)

As for the adjustable brake bias, I set it once & haven't touched it since....


.

Nick W.
The problem with modern cars? - Too many computers, not enough carburetors...
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post #5 of 8 (permalink) Old 09-13-2018, 10:35 AM Thread Starter
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thanks guys, how did you setup the balance? did you need some sort of rolling road?
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post #6 of 8 (permalink) Old 09-13-2018, 10:43 AM
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Setting balance just requires a track or low-traffic road. A rolling road isn’t necessary or helpful.

You do a series of hard stops- right up to where the tires start to lock up. Start with the bias moderately forward and then dial in bias towards the rear on progressive hard stops until the rear starts to get loose under braking, then dial back a bit more forward bias for a final setting.

Ok a track car, you may want a remote bias adjuster so you can adjust for specific tracks and conditions. A tighter track with lower speeds may demand more rear bias, and vise versa.

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post #7 of 8 (permalink) Old 09-13-2018, 11:01 AM
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Quote:
Originally Posted by nealric View Post
You do a series of hard stops- right up to where the tires start to lock up. Start with the bias moderately forward and then dial in bias towards the rear on progressive hard stops until the rear starts to get loose under braking, then dial back a bit more forward bias for a final setting....
That is exactly how I did it...

Nick W.
The problem with modern cars? - Too many computers, not enough carburetors...
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post #8 of 8 (permalink) Old 09-16-2018, 12:55 AM Thread Starter
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Excellent thx guys.
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