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12-15-2002, 05:26 PM
Ok people Know that We've basically all learned alot about front end travel lets learn about bumb steer! FIrst of all the following is what I've gathered from studying front end design's and what i've come up with in my own head! SOme of it may be wrong but im willing to bet most of it is very right!
In the past Many people beleived it had to do with the width of the frame betewn the a arms. This is half right and I'll explain. Bumb steer has everything to do with the pivot point of the tie rods in cunjunction with the pivot points of the a arms! Usualy the pivot point of the tie rods is narrower because of the mounts connecting the steering stem to the tie rods is fairly narrow in itself. meaning the tie rod ends pivot is not ligned up with the a arms pivot, Therefor as the a arms travel upward the leverage on the tie rod is going to change because the linkage is not the same legth. THen the tie rods pull and cause the bumb steer as the a arm travels up!. Back to the leagers narrow frame! since the frame is narrower that moves the pivot point of the a arms closser to the pivot point of the tie rod ends wich makes the leverage more equaly distributed through the tie rods and the a arms. making them move upward at more equal amount.
Remember im no teacher so if it was hard to follow read it again. If someone with a engineering degree (aka john arens) could tell me if im totaly out to lunch then that would be great. I gathered this all my self with no help whatsoever. I just thunk it up.
In the past Many people beleived it had to do with the width of the frame betewn the a arms. This is half right and I'll explain. Bumb steer has everything to do with the pivot point of the tie rods in cunjunction with the pivot points of the a arms! Usualy the pivot point of the tie rods is narrower because of the mounts connecting the steering stem to the tie rods is fairly narrow in itself. meaning the tie rod ends pivot is not ligned up with the a arms pivot, Therefor as the a arms travel upward the leverage on the tie rod is going to change because the linkage is not the same legth. THen the tie rods pull and cause the bumb steer as the a arm travels up!. Back to the leagers narrow frame! since the frame is narrower that moves the pivot point of the a arms closser to the pivot point of the tie rod ends wich makes the leverage more equaly distributed through the tie rods and the a arms. making them move upward at more equal amount.
Remember im no teacher so if it was hard to follow read it again. If someone with a engineering degree (aka john arens) could tell me if im totaly out to lunch then that would be great. I gathered this all my self with no help whatsoever. I just thunk it up.