Pertronix ignition install question

[Gubi]

So I'm installing a Pertronix Ignitor into my TR7. I noticed that the Pertronix pickup is not in the same rotational location as the stock electronic ignition pickup. Does anyone know if this is by design, or should I rotate the distributor body so that the new pickup is in approximately the same place?

If I leave it where it is it looks like it's about 30 distributor degrees retarded from stock. I want to at least make sure it's close enough that it'll start. Thanks for any suggestions.

For the record this job would have been a lot easier if any of the wiring diagrams in the service manual were for the DM4 distributors. Sigh.

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Tom
'79 TR7
'87 Alfa 75
'91 Alfa Spider

[saabfast]

I fitted one of these a few months back (ok, maybe 4 or 5). It does fit in a different place to the points heel but mine started OK, if a bit rough, after installation. (There is a thread somewhere in the last few months where I posted some pictures). I then adjusted the timing (strobe & turn the dizzy) to the standard 10 deg BTDC and it ran fine.

Alan
Saab 9000 Stg 1
Saab 9000 2.3 FPT Auto
'81 TR7 DHC

[Gubi]

Thanks. I heard back from Pertronix tech support today as well: they said the different location is by design. So I'll just see what happens when I start it and adjust the timing from there.

Now to just find the time to finish the job...

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Tom
'79 TR7
'87 Alfa 75
'91 Alfa Spider

[saabfast]

Missed your location Gubi, the standard timing setting might be different for your car dependent on model.

Alan
Saab 9000 Stg 1
Saab 9000 2.3 FPT Auto
'81 TR7 DHC

[Gubi]

Mostly the same. Everywhere in the US except California it's 10 BTDC for a '79. CA cars had an additional 12-degree vacuum retard at idle so it's 2 ATDC.

That's assuming you have the vacuum retard hooked up, of course...

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Tom
'79 TR7
'87 Alfa 75
'91 Alfa Spider