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Join Date: Dec 2005
Location: Mount Airy, MD
Posts: 4,299
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SCRS pedal cluster in a 67
Has anyone installed an SCRS/RSR pedal cluster in a 67 SWB?
I’m doing a DIY balance bar addition and there is no way in hello can get the tilton 76 series to fit without some crazy 45* angle relative to the pedals. I know there is a bit of angle, but this is nuts. I’m guessing there is a difference in the firewall between the short and long wheel base cars?
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1967 912 with centerlocks… 10 years and still in pieces! |
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11-13-2017, 05:25 PM
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Join Date: Feb 2004
Location: UK
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Tadd,
If you fit an RSR Style pedal box you will have to cut the floor of the car and weld in a new section as the RSR Box keeps the Master Cylinders outside the passenger compartment. The SCRS box is better as it re-locates the cylinders inside the passenger area but it doesn't work with a standard pedal board. We have seen several pedal boxes of this type fitted without a board and this does create some risk as the accelerator pedal stop is a part of this board. If you remove the board then there isn't a feature to limit the accelerator pedal travel other than the carb linkages. In the limit the side of the pedal box, which is only around 1mm thick, can deform and the rod from the pedal to the reverse link will misplace and potentially jam on the centre tunnel and life can become quite exciting.   We have made Bias Adjustable Pedal Boxes for years and the brake pedal has been designed to work with a virtually standard pedal board - the slot does need to be slightly widened. We also use a bias bar with 'overtravel' protection so that if one circuit fails the mechanism doesn't jam which is a common failure with bias bars that used a spherical plane bearing. Last edited by chris_seven; 11-14-2017 at 01:06 AM.. |
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11-14-2017, 01:00 AM
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Location: Mount Airy, MD
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Chris:
Thank you for the reply! I too like the SCRS unit better as it keeps everything inside. Appreciate the hint and will look in that direction (pedal boards). If I haven't gotten things in line by the new year, I will give y'all a PM since you do such great engineering. I really want to get on the road this coming year (before 50!), but I've come this far DIY...
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1967 912 with centerlocks… 10 years and still in pieces! |
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11-20-2017, 09:50 AM
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Location: UK
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Tadd,
I would be more than happy to supply you with a 'kit' of parts if that helps.
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11-20-2017, 10:24 AM
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Join Date: Apr 2003
Posts: 141
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Yeah, you can make it work without modifying the chassis. I made a replica of the SCRS pedal cluster for my 68 911 race car.
       
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11-20-2017, 10:49 AM
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Join Date: Feb 2004
Location: UK
Posts: 2,230
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Phil,
How thick is your brake pedal? One of our competitors in the UK makes a box with an 5mm thick pedal but these tend to bend under duress and on early LHD boxes the standard was 8mm thick. On 'our' box we have made efforts to keep the bias bar in-line with the pedal and eliminate any chance of introducing an undesirable 'couple'. We also have a brake pedal 'stop' to ensure that the snap rings in the cylinders don't see any tension forces. |
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11-20-2017, 01:11 PM
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Join Date: Jan 2012
Posts: 1,244
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do the SCRS use the longer ratio pedals over the earlier 3.0 RS cars?
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11-20-2017, 02:45 PM
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