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| Joined: | 02-05-2015 |
| Location: | Saint Augustine, Florida USA |
| Posts: | 169 |
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What type of cranking compression does a stock 907 generate? Maybe I can figure it out with a compression gauge.
Today I took the distributor apart...overall it was in very good condition, especially the bushing and shaft. They were in very good shape. I changed the inner and outer seals, cleaned and lubed the advance mechanism, cleaned and set the points. The wires under the cap are soaked in oil. I hope this doesn't cause cross talk. The wire out from the points was cracked and brittle so I made up a new one. The interesting thing was the vacuum can. It actually worked perfectly and held vacuum. Too bad the end of the spring that attaches to the breaker plate had corroded off. The breaker plate is free to move as it chooses. SO, now I need to stabilize the breaker plate, and the easiest way is to install another advance can. May I be so bold as to ask for recommendations? They seem to be about $100 so I'd like to buy as few as possible.
I also ran the dist on the machine. All RPM will be crank rpm, halve it for dist rpm. It starts advancing at 1200/1*, 1300/3*, 1600/4*, 1800/5*, 2000/6*, 2200/7*, 2400/9*, 2600/10*, 2800/12*, 3200/14*, 3600/15*, 4200/16*, 4600/17*, 5200/18, 7000/18.5* Point bounce began to set in around 5500-5700. Red Lucas points.
Very drawn out curve. It has an 18* advance limiter so that's about right, but I'm really wondering about those springs.
So that's where I'm at. I need to buy some parts. I'm going to search the ignition forum for a CORRECT curve, and if anyone has an opinion on a vac can or spring set I would be very appreciative.
Last edited on 02-20-2015 08:38 pm by Bfitz241