I read that Real Fast came up with a 3:1 ratio, and I thought "well F uk, there's the problem! EDIT 1/11: He's right. The force rqtio is way too low.
Total piston area = 2838 mm sq. Divide by 452 mm sq for the stock 24 mm sq Master Cyl is a 6.28 ratio. RIGHT NOW you have 3.14 Ratio.
I converted my 2-3/8" for the stock caliper to 60 mm, and came up with 2856 mm sq. Divide by 452 for the stock M/C = 6.32. STOCK is 6.32 Ratio
Remove the proportioning section of the stock Combination Valve. This is the side on the FRONT brakes lines.
Remove the nut.
Remove the plunger and spring.
Remove the seal from the plunger. (So the valve doesn't "work" anymore)
You have to plug the little hole in the nut to seal it. You can tap it, and put a screw in it with red loc-tite. I tig welded the hole closed. More quicker.
Put the guts back in the combo valve in the order they were, and install the nut.
You have to leave the spring and plunger in there to center the valve plunger for the warning light section. When you do the rear discs, you'll remove the rear side of the combo valve, and grind the land off so the rear section doesn't work either. But for now, with rear drums leave the rear section intact.
Total piston area = 2838 mm sq. Divide by 452 mm sq for the stock 24 mm sq Master Cyl is a 6.28 ratio. RIGHT NOW you have 3.14 Ratio.
I converted my 2-3/8" for the stock caliper to 60 mm, and came up with 2856 mm sq. Divide by 452 for the stock M/C = 6.32. STOCK is 6.32 Ratio
Remove the proportioning section of the stock Combination Valve. This is the side on the FRONT brakes lines.
Remove the nut.
Remove the plunger and spring.
Remove the seal from the plunger. (So the valve doesn't "work" anymore)
You have to plug the little hole in the nut to seal it. You can tap it, and put a screw in it with red loc-tite. I tig welded the hole closed. More quicker.
Put the guts back in the combo valve in the order they were, and install the nut.
You have to leave the spring and plunger in there to center the valve plunger for the warning light section. When you do the rear discs, you'll remove the rear side of the combo valve, and grind the land off so the rear section doesn't work either. But for now, with rear drums leave the rear section intact.
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