setting the gap on a points type dizzy... makes me dizzy... - Hot Rod Forum : Hotrodders Bulletin Board
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Old 03-27-2007, 10:59 AM
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setting the gap on a points type dizzy... makes me dizzy...

Well, I would consider myself electrically handicaped... I've read some past posts on setting the gap on the points but I need pictures!!! . I have a gm dizzy, don't know the year. I bought a new set of pionts/condesor today and the auto parts guy said it's not pre gapped, what exaclty am I trying to gap. Is it the little copper thing that touches the little round thing??? sorry for the terminology but as I stated before I don't know anything about this and I want to learn, please help a brotha out...

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Last edited by JJ350; 03-27-2007 at 11:04 AM. Reason: sorry this should go in the electrical forum..
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Old 03-27-2007, 01:21 PM
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Does the dizzy have one of the little "slide up" metal windows on the OD, near the base?

Pat
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Old 03-27-2007, 01:29 PM
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patm, I reposted this in the electrical forum. but to answer your question , yup
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Old 03-27-2007, 02:01 PM
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Well if you have the window, then you have it easy! You need a dwell meter and a long 1/8" hex key. Hook up the dwell meter to the coil (+ side) and connect the ground to any good grounding spot in the engine compartment. Start the engine and you "should" see a meter reading of between 27 Deg.s to 31 Deg.s ...29 Deg.s is ideal! ...IF not insert the hex. key thru the "window" into the points adjusting screw and turn the setting (this adjusts the point gap) until it get within this range. NOW your points are set! ...Good Luck!!!
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Old 03-27-2007, 02:11 PM
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11ECHO, thanks but one question.... what if my engine wouldn't start?? could i still check the dwell as long as the engine was cranking? I think it won't start becuase the gap isn't set right, i'm getting a very weak spark..
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Old 03-27-2007, 03:21 PM
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JJ350 ...I believe you can, but you'll need either a remote starter or a "volunteer" to crank the starter. Too make this easy, pull the spark plugs so the engine cranks easier, and be sure to hang the plug wire away from everything. Crank the motor (no longer then 30 seconds MAX. (hard on the start if longer)) and watch the dwell. You should be able to adjust per the dwell meter reading.
IN CASE YOU CAN'T ...bump the starter until the rubbing block on the point set is on top of the cam lobe(under distributor's centrifugal advance). At this point the points should be open where the gap is 0.016" (use feeler gage) IF you have this distance at high cam lobe your "close" to the correct dwell setting. Again GOOD LUCK!
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Old 03-27-2007, 03:33 PM
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11echo, thanks so much!! that really helps.
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