Marcos Maniacs

Hi guys,

When my car was first shipped over to Canada in 1976, I had the factory
modified it to comply with Canadian motor vehicle regulations. This included
a dual braking system with a dual master cylinder in place of the original
single one. The cylinder they used fit in  the pedal box area but
unfortunately I have no idea where it originated. Following the restoration
after the fire in 1978, the car was rebuilt without the dual braking system
so I can't provide any more info. It turns out that the car was actually
first built a few months before the regs requiring a dual braking system
came into effect so it wasn't needed in the first place. I'm sure Rory
McMath could let you know what master cylinder would work.

Gary, would you please send the photo and cost of the passenger side glass
holding bracket.

Regards,

Paul Dransfield
3 litre Volvo

-----Original Message-----
From: Garry Diver [mailto:garrydiver@...]
Sent: June 22, 2004 10:48 AM
To: MarcosManiacs@yahoogroups.com
Subject: RE: [MarcosManiacs] Brake upgrade for 84 Marcos


Hi Paul,
  Here is part one of the answers to your questions.
Firstly, brakes. Most Vintage organisations have their own interpretation 
but I have gone with the SVRA rule which says you can upgrade the brakes but

stay in period, ie no Willwood Aluminum calipers on a '61 Sprite. I have a 
set of Cast calipers and pads which give about 50% more area and are almost 
bolt on. I have stayed with solid, but grooved and dimpled rotors which is 
allowed. This should be OK for you since you have an 84 although I will 
admit it is a bit of a stretch on my '69. I have always worked with the tech

guys BEFORE turning up for my first event since they are far more receptive 
that way. It is a strange anomoly that It is OK for me to run a fairly 
modern 850hp big block Chevy in the CanAm car but they make me run 30 year 
old brakes.
I can't find the pictures of the brake kit before assembly but will send 
them when I find then.
If you wish I can supply a complete kit which includes the small mods needed

to make everything a bolt on fit. I haven't finalized the price yet but 
think about $600 complete.
Secondly, Dual braking systems.
  This is more complicated. The issue is the amount of room in the pedal box

and the need for it still to be moveable.
My original idea was to run with a balance bar at the pedal box with twin 
(side by side) master cylinders and remote reservoirs. However, there is not

enough room to locate them side by side without fouling the threaded fore 
and aft adjuster rod. My plan was to relocate the adjuster rod and clutch 
mechanism. However I chose a simpler solution by replacing the Master 
cylinder with a duel cylinder('74 Beetle) which has the same bore, a remote 
reservoir, and a Tilton Bias adjuster which I located in the cockpit. This 
meets the rule requiring a duel braking system
I also relocated the pedal box about two inches away from the centerline to 
give me more room to install custom headers.I then cut back the footwell by 
the same amount on either side so I have a clear 4" between the exhaust port

and the footwell.
  Sorry to be so long winded but I hope you will benefit from my 
experimentation.
I have included some pictures but better ones to follow.
Regards
Garry
PS Give me a call at 404 869 9929 if you would like to chat
>From: "Paul Weidner" <weidnerpaul@...>
>Reply-To: MarcosManiacs@yahoogroups.com
>To: MarcosManiacs@yahoogroups.com
>Subject: [MarcosManiacs] Brake upgrade for 84 Marcos
>Date: Mon, 21 Jun 2004 02:27:03 -0000
>
 
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