Delco Voyager EST igniton
 

The Delco Voyager systems are sold as stand-alone systems as 'Excellent replacement kit for older "points" distributor system' for example here.

What I cannot understand is how this 'Excellent' system can use the same ignition module for all engines (4, 6 and 8 cylinder) with the Delco EST distributor.

Does anyone have accurate info about advance curves for these systems? I have seen postings of anything between 11 and 22 degrees on V8's ... Also, as Marine Power is using them on some of their motors maybe someone has a manual from them ...?

they have about 20 deg in the module, run without any ECM, they bring in most all of the advance right at start up...crusader and merc used them OEM and they do work well and are very simple...have them in my gibson w/crusader power..you can set your total timing at full advance and you are good to go..

I have a couple of kits laying in my shop, so I know they are simple. Problem was first batch turned out to have some problems, loosing spark over 3k rpm. Got them replaced but have since then been hesitating to use them on any builds.

How early do they bring in the curve? Below idle speed? No problems with cruise speed knocking?

What timing procedure do you use with the 'tool'?

the marine units use a different module with a advance that works without running thru a ECM, a std auto one won't work right, tried that once, In my app I run about 26 deg total advance, which is about 10 initial..they run cleanly to 4k..but it's a big heavy boat and runs most of the time 3200-3500, some of the advance is in at idle, once timing is set and the timing wire flipped back to run position..no issues work great..

To get initial 10 at idle, do you set it even closer to 0 deg at idle when locked?
If yes, then you will never use the full advance curve under operation ...? The lowest part of the ramp will only act as cranking assistance ...

know idea what you are saying there, there is a timing plug on these dist, you disconnect it, flip it over to the time position, set initial at say 10 deg, shut off, flip connector to the run position, then runs the advance curve...

RPMS/Advance
700/11
750/12.5
800/13
1000/15
1250/16
1500/16.5
1750/17.5
2000/18.5
2250/19.5
2500/20.5
2750/21.5
2800/22 Max advance!

endeavour, I recognize those numbers from Moore's book.
Don't know about your experience, but my opinion is that the curve is way to flat to use as an *excellent replacement' system standard motors.
A 5.7L Vortec produces best power at 29 deg full advance (tested in dyno), that would set me at 18 deg at idle.
Can't see how Marine Power, Quest and others can use those systems successfully, or I must be missing something very basic. Do they really set them to produce full power?

the numbers endeavour32 posted look close to what mercruiser uses, which they get from gm marine performance.

Keith2500, I cannot really agree. That curve looks more like a TB IV V6 module on a V8. A TB IV V8-22 does have an advance of 22 so setting at max 30 gives 8 at idle. Can't see the similarity between Delco and TB ...