Nothing appeared to be loose underneath. I dripped some 130W oil on the driver side hinge pivots.
![](http://emoji.tapatalk-cdn.com/emoji1696.png)
![](http://emoji.tapatalk-cdn.com/emoji1696.png)
On the way home from a run to Crystal Brook on the weekend, the engine started pinging when I sunk the boot above 2000rpm. Fresh 98 plus upper cylinder cleaner and octane booster, and a bit of sustained revving under load, sitting on 4000 in second and revving out to 6000 didn’t make much improvement. It also pings when I button off over 4000. I think this latter may be partly due to shaft end float which will allow the ignition to advance as the cam gear slows the dissy.
So I graphed this dissy roughly as follows:
0700rpm 09 degrees
0900rpm 12 degrees already
![](http://emoji.tapatalk-cdn.com/emoji54.png)
2000rpm 27 degrees
3000rpm 36 degrees
4000rpm 45 degrees with ported vacuum
4000rpm 40 degrees no vacuum.
I swapped in the unit from the blue 3.3 out of the sedan. There is virtually zero end float in this one. Set to 9 degrees at 700rpm idle. Reading 28 degrees at 2000rpm. Approaching 3000 rpm, advance tops out at a total of 34 degrees. This dissy appears to have been tweaked by limiting all out mechanical timing. This must have been done prior to my purchasing the motor in 1985. Test run in the morning.
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