Quote:
Originally Posted by Jack Gifford
PM me your name and address and I'll send you some 7.5 amp glass fuses.
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Hi Jack, that is very kind of you! I'll send you a PM.
Next task I want to do is the installation of the Pertronix Ignitor II electronic ignition. Since I have to adjust the ignition timing afterards, I am wondering how to do it correctly... This is why I am confused a bit:
The shop manual shows the marks on the flywheel and the pointer on the harmonic balancer:
This is how it looks on my engine. The middle mark is missing, but that's not a problem I guess, I think the upper mark is the 5° BTDC mark I need:
So far so good, but now comes the confusing part. This is what the shop manual says about how to adjust the timing:
I did many times engine timing on other cars, but I am missing several details here:
- at which engine condition the timing should be made? I guess on a warm engine with around 70-80°C oil temperature, as usual, right?
- at which revolutions should the 5° BTDC be met? The shop manual doesn't say anything about this, but this is important since the distributor has centrifugal and vacuum advance too. Is this meant like this: 5° BTDC should to be met at idle revs, so at around 450-500 rpm?
I saw the mentioned table at 12-46 in the shop manual, where the centrifugal advance of the ditributor is shown. There is no centrifugal advance at idle revs according to this table.
- and most important: what about the vacuum advance? From other old cars I know that the vacuum hose from the carburetor needs to be removed while doing the timing. Here the shop manual doesn't say anything about it. We also dont have a rubber hose here, but a stiff steel hose coming from the carb. Is the vacuum meant to stay connected while doing the timing?
All my questions are regarding the original 1955 Pontiac 287 cui V8 engine. Any hints are appreciated
