You need to think from the tyre footprint backwards. If you proportioned the brakes correctly for panic stopping in dry conditions, In the rain or other less ideal conditions you would have front wheel lock up Which is more dangerous Manufacturers had the brakes proportioned for lower G force stopping ,then added a pressure limiting valve to prevent rear wheel lock up during "Oh F**** "moments.ĥ7 chevys do not have any proportioning valves, or residual valves in the system You might need a slightly smaller wheel cylinder to reduce clamping pressure. Less G forces = Less weight transfer onto the front. Go and try your car on a slightly slippery surface and see which end locks up first. They had a smaller friction surface on the front shoes. Click to expand.The 57 had narrower 1-3/4" shoes on the rear compared to 2" shoes on the front Ĭhevy stamped a different offset backing plate for the narrower rear drums so you cannot swap front shoes into the rear.
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