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If you're replacing discs and pads anyway, a 199-93 upgrade kit is really worthwhile for an A-model. The key change is a thicker disc -> more heat storage capacity -> much higher kinetic energy rating, 117K vs 155K.
You get discs, pads, caliper shims, new bolts, rivets, the works. |
They work fine
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When you compare and old one to the new ones (laying on the mounting side) there is a small difference in height. The calipers have plenty of "float" so it was not a problem. |
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I'm still noodling the details as I'm just back to the shop from the hangar. Oh, and those "longer" bolts that the "upgrade kit" comes with are exactly the same size as the original bolts -15 and no drilled head. Silly. Note to the wiser: get the cheaper Rapco rotors, make your own shims (little piece of 1/8" aluminum) and be prepared for not just a bolt up upgrade, depending on your particular setup.. |
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Scott are you suggesting that even the regular Rapco discs (not the thicker the ones), are not bolt on? Some of the previous posts indicate that there is no difference than the price. So just wondering... |
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The thicker ones required me to add a spacer washer (purchased from Granger Part # 5GB11) to the axle before sliding on the wheel. Then the nut was shaved down the same amount. This kept the bracket from contacting the thicker disc. The new bolts do need to be 1/8" longer. They don't need to be drilled as long as you use star lock washers and replace them when removed.... My Warrior was like this from the factory. I had that airplane for 20 years with no problem from any inspection. Sure is a lot easier than leaning down on your ear twisting wire. I made my 1/8"shims from 1/8" alum bar stock from ACE hardware...:eek: The thicker brakes work great!! have had them on for a couple of years and I DO use my brakes....6A. So far there is no sign of heat affecting the finish surface of the bell of the disc brake. The disc takes the heat just fine. Save your money, order the thicker discs and the longer bolts. Spend an hour making the shims and end up with better brakes that should never cause a wheel pant fire. The pads should also last longer due to less heat. |
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So, you are thinking about making a new spacer (inner seal ring) that is .0xx longer and shifting the wheel by 1/2 disc thickness. Then machining off the axle nut the exact same amount so the end play is back to original - sounds like a good plan. Elegant. Good thinking, just what I expect from you. Thanks Scott, good conversation. EDIT - I finally read gasman's post, and he did the same. Good conversation anyway. |
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