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Old 09-01-2020, 08:39 AM   #87
vintagewrench
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Join Date: May 2016
Location: Vermont
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For what its worth on disc front, drum rear 120/1800 cars they can be used without a booster. I took it off of my '67 1800s for weight loss, which has a dual master two years ago and have logged 10k road miles and 900+ road racing miles with the VSCCA. At the same time Green Stuff pads were installed and it stops fine, but needs a higher pedal effort.

R32RennSport recently installed Porterfield pads in his 120 w/o a booster on Ian at High Performance Volvo recommendation and also reports good results.

The original master cylinder is 7/8" but the earlier models made before Girling boosters came into use had 1" bore units for higher pressure. I'm going to install a dual 1" Wildwood unit over the off season because I want more braking with less effort on the road. Although on the track the brakes work excellent as is.

I don't know how well this would work on the later all disc brake cars, but it might be worth taking a look at?
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