Here is my comment: 1.) as a longtime IML member I often said: my IMP drum brakes work fine. 2.) The values that Eric found - GREAT JOB - are reasonable because a. the friction surface of the drum brakes are bigger than the friction surface of the rotors b. the cars were tested only once and only from 60 to zero instead 120 mph to zero. 3.) The weigth of the tested cars is not mentioned. 4.) In general: braking means converting kinetic energy into heat. To brake a car you need two friction surfaces and a system to press them together. The formula for kinetic energy is m/2 x v² meaning that speed goes in by square !! If You use rotors you have the pads, the friction ring of the rotor, and mostly a floating calliper system with one piston. You will realize at once, that the pad surface of the disk brake is much smaller than the friction surface of the drum. So what is better? The cooling of the rotor is way better ... meaning how quick the heat is dissipated. And the rotor / calliper combo is much cheaper to produce and to install. The service to me needs the same care - even e floating calliper has to be serviced or it will not float. 5.) More improvement is given by a fixed calliper system. You will have at least one piston up to four on each side of the calliper. This system needs a special front end construction, which has to be very stable. Fixed calliper disk brakes show better results but often less comfort. (noise, warping) 6.) More improvement is given by bigger pistons in the callipers, more hydraulic pressure, and more aggressive pads .. 7.) More improvement is given by larger and thicker rotors which need larger wheels 8.) More improvement is given by airducts, which carry cold air to the disks and carry away hot air from the disks. 9.) More improvement is given by special design of the rotors to guide the cold air from the inner side through the rotor to the exterior ... 10.) Now how is the Imperial ? a. My 1960 is heavy as a Hummer, has 15" wheels and drives 100 mph - I would never go faster. A Hummer has 20" to 28" wheels b. The servo, the brake master cylinder and the wheel brake cylinder produce a sufficient brake force c. The friction surface is huge d. The heat dissipating is bad. e. The result is good for braking once from 60 mph but bad from 100 mph and very bad for repeated braking... f. To get a better result with rotors you have to enlarge the friction surface (larger wheels), the pressure (larger pistons better servo), the heat dissipating (HOW?) What is possible now for older IMP'S? Movit, my son's business had developed special brakes for SECURITY CARS. Those heavy weights, mostly MERCEDES G - have 15"/16" wheels. Movit developed special BILLET six piston callipers for those little !! wheels, with a large pad area and thick 298 mm rotors which fit under the 15" wheels. Probably I will convert my Imp this Year with those brakes, but You may imagine that those BILLET callipers are not "GIVEN" .. the official price is 3400 EURO .. for the kit. Pleas ask if You have any further question .. dietmar www.movit.de/htm/imp60hom.htm -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx]On Behalf Of Eric Sent: Montag, 24. Januar 2005 07:34 To: mailing-list@xxxxxxxxxxxxxxxx Subject: IML: Brake Testing Data Henry Ford, Well shucks, you didn't mention having the EFI parts already, go for it. It's a frequent topic in here and we'd all be interested in seeing the conversion. I gathered braking info from the road tests in the site. There appears to be a 10-20% shorter stopping distances in disk brake Imperials from the tests of a couple of different magazine brands. None of the magazines we have listed braking distance testing prior to 1961, from what I could find. The drum brake cars are grouped and averaged apart from disk brake cars. All tests were from 60mph. 1961 158 1962 185 1963 192 1964 176 1965 184.6 Last of drum brake tests Average 179.12 for front drum brake cars 1968 158 Budd disk 1969 116.7 In this test, all cars stopped shorter than avg 1971 164 With Sure Brake 1973 151.6 1974 167 4 wheel disk 1981 181 Average 156.383 for all front disk brake cars Average 151.46 for all front disk brake full size cars Average 160.15 for all front disk brake full size cars excluding 1969 abnormally short stopping distance. Let us know how it goes. Eric Portland, Oregon _______________________________________________________ I had bought a edelbrock fuelinjection system for a 76 cordoba with 440 in it after I wrecked the car to avoide hitting a kid on a bike. I pulled all parts off the car and now I have an option as to use it on the imperial. when it was on the cordoba the car ran very smooth. starts on first try never haveta pat the gass int the mornings. and the exhaust was cleaner less carbon. basicaly the engine ran like new. no hesitation .or lugging on mountain roads. . after all . if chrysler had today's technoligy back in the 50's you bet every imperial would be the first to have it as a standard part on the car.. I wont be using any chrome on the engine at all. I can hide most of the fuel system and ecm there's plenty of room to hide just about anything under that big hood. the system I may use is about 2 yrs old but has a few mods done to it to make it look factory in the cordoba........ and thanks for everyone input on this subject. but like most of you I probly will use the factory carb. I have a kit to rebuild it on order, from autozone. ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm