I need to set the offset on the clutches in my 89 Indy 500. I know there's a tool the shops use to do the offset, does anyone know if this can be done with a straight edge and a tape??? Someone must have a trick up there sleeve for this procedure.
Clutch alignment tool
- Thread starter HighmarkMiked
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Geez, That sled looks awesome!! You are ndoin a first class job on that ...all i do is eye ball that the secondary is about center to the primary...that is about where they sit... anyway that's the way I do it...If there isn't a stack of shims already between the scndry and bearing, you may need to get some to keep it in that line.
It's a 5/8ths offset. Run a straight edge along the back of your primary so it goes behind the 2ndary, measure from the straight edge(back of primary) to the back of the 2ndary, should be 5/8ths. Usually a little more at the front edge of the 2ndary, thats so when the engine twists on the engine mounts under torque it actually lines up straight. Shim the 2ndary so it can "float" a little, meaning you can push it in and out about 3/16 on the secondary shaft.
I understand what your saying Jay but isn't there a exact number for the front edge of the secondary, see attachment ( forgive the crappy draftsmanship )
I guess the exact # is 5/8" Thats why I allow some lateral movement in the 2ndary clutch on the jackshaft, so the 2ndary can move around a little and align itself with the primary. Also if you don't have some movement on the 2ndary the bolt that holds it on will keep backing itself off. I put on more miles than I care to admit with the 2ndary just being held on by the belt until I figured that one out.
But the primary sits off parallel from the seconday, so if there is 5/8 offset at that back of the secondary there should be more offset at the front. The question is how much more offset at the front of the seconday???
I have always adjusted for the 5/8" offset at the back of the secondary with the clutch pushed against the washers. Then adjust the washers on the retaining bolt to allow .030" to .060" of clutch float on the jackshaft. The front edge of the secondary is allowed to have an additional gap of .060" to .090" more than the back edge. If it is out of that range then you need to loosen the motor mounts and adjust the engine torque stop. If you don't have an engine torque stop then loosen the motor mounts and adjust engine.
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Ok Pop I will go with that. I have the torque stop so I will adjust to your spec. Much appreciated.
