ecc_33 said:
Sorry Dave, I actually have your kit and thought the guy above did too. My problem was my back drums were backed off to much. The pedal is still soft but it stops much much better. This winter I'm going to put a set of 6 piston wilwoods and be done with the front.
No issues.
For your current setup, make sure you have new rubber lines front and rear OR stainless steel braided flex lines. Over time old rubber lines will start to balloon when you apply your brakes the ballooning will reduce your braking performance.
Also 100% organics pads and shoes work better when colder than semi metallics and ceramics. They don't require a lot of heat to make them work effectively. Make sure the pads have an FF rating on them. Bed them in properly.
Just remember, more pistons does not necessarily mean more piston area. More piston area gives more clamping force.
The stock caliper has 2.5" diameter piston with a piston area of 4.91 square inches.
The Wilwood kits for the 15" wheels and 12.19" diameter rotor and 6 piston caliper Dynapro calipers has an area of 5.06 square inches. Which is better. Most of the benefit in braking will come from the larger diameter rotor.
The Wilwood Superlite 6 piston calipers have an area of 4.04 square inches.
Here is the brake down in Rotor Torque between 3 Wilwood choices and the stock front brake setup.
Brake Rotor Torque with 7/8" bore master cylinder
10.5" rotor and stock caliper (4.91 sq in piston area)- 964 ftlb
12.19" rotor and 6 piston Dynapro caliper (5.06 sq in piston area) - 1153 ftlb (may be able to use 15" wheel)
12.88" rotor and 6 piston Dynalite caliper (4.04 sq in piston area) - 972 ftlb (only slightly better than stock, 17" wheel min.)
14" rotor and 6 piston Dynalite caliper (4.04 sq in piston area) - 1056 ftlb (18" wheel min.)
If you look at the 4 piston Wilwood kits this is the break down of the Brake Rotor Torque
12.19" rotor and 4 piston Dynalite caliper (4.8 sq in piston area)- 1097 ftlb (may be able to use 15" wheel)
11" rotor and 4 piston Dynalite caliper (4.8 sq in piston area)- 990 ftlb (only slightly better than stock)