Looking at a 'stash' of small Delco boxes I got on eBay, and there's 3 of contact sets #1966294 (D-112P). My Chevrolet parts books show this number starting in service exclusively for 427's (ie. not 396's) in 1966; on obviously non-transistorized cars.
The general-use contact sets for all V8's (exc. 427, exc. dual points) seem to be #1931988 (D-106P) for '57 thru '70 (my latest parts book) [exc. dual points, exc. 427's, exc. '70 350/350hp].
By the orange/white/black box design, I'd say these were of the '66-69 timeframe. The D-112P's seem to be visually identical to an NOS D-106P that I have, except that the spring tension is at least 50% greater on the 112's. BTW a red/white/blue box of 10 foil wraped packs of these D-112P's just sold for $188 on eBay, so someone must want them real bad
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Now I always thought that higher spring rates helped avoid points "bounce" at high rpm's. So why restrict these points to the 427's (ie. L36, L68, etc) which have redlines lower than some of the high revving small blocks ? They did call for the '112P' on the 1970 350hp small block, though -- that's the newest parts book I have, so I don't know the story thru 1974.
Then there's the #1966289 (D-106PS) which I assume is identical to the '106P' except has a screw terminal for the condenser and negative lead to the coil, rather than the clip-on type of terminal. My 1970 Corvette parts book shows this contact set as being an alternate to the '106P' for '58 thru '67 (exc. 427).
Can anyone clear this up for me, and state what Corvettes originally came with the D-112P contact set ?
The general-use contact sets for all V8's (exc. 427, exc. dual points) seem to be #1931988 (D-106P) for '57 thru '70 (my latest parts book) [exc. dual points, exc. 427's, exc. '70 350/350hp].
By the orange/white/black box design, I'd say these were of the '66-69 timeframe. The D-112P's seem to be visually identical to an NOS D-106P that I have, except that the spring tension is at least 50% greater on the 112's. BTW a red/white/blue box of 10 foil wraped packs of these D-112P's just sold for $188 on eBay, so someone must want them real bad

Now I always thought that higher spring rates helped avoid points "bounce" at high rpm's. So why restrict these points to the 427's (ie. L36, L68, etc) which have redlines lower than some of the high revving small blocks ? They did call for the '112P' on the 1970 350hp small block, though -- that's the newest parts book I have, so I don't know the story thru 1974.
Then there's the #1966289 (D-106PS) which I assume is identical to the '106P' except has a screw terminal for the condenser and negative lead to the coil, rather than the clip-on type of terminal. My 1970 Corvette parts book shows this contact set as being an alternate to the '106P' for '58 thru '67 (exc. 427).
Can anyone clear this up for me, and state what Corvettes originally came with the D-112P contact set ?
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