I got my Pacemaker ignition and it was set at 220 1200 250 30. I saw an article that said the settings should be 220 2000 250 10. So I called Darrin at Pacemaker (407)-709-9578. I told him I have a lycoming AV 540 engine, he told me to put the settings at 210 2600 250 80. There is a world of difference with the performance with the settings he suggested me. If you have any questions he suggested to call him.
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Pacemaker Settings
- Thread starter RC24
- Start date
Slidin Gator
Well-known member
RC,
I believe you are referring to one of my posts.
https://southernairboat.com/phpBB3/viewtopic.php?p=692930#p692930
You had me scratching my head over the last number (80 vs 10), so I double checked and I was off by a decimal place, my last number is 100 not 10. So I have updated those posts accordingly. Thanks for catching my error!
When I first installed my Pacemaker, I made the same mistake as you did and used the numbers that were in it. Boy did it run like crap. Basically, the unit is NOT adjusted on delivery, don't run without setting properly.
Just to repeat the decode, I will use the numbers I am running:
220 = 22.0 degrees BTDC base timing
2000 = RPM that MAP is cut off and timing is set to end timing
250 = 25.0 degrees BTDC max timing
100 = 10.0 degrees MAP/Idle adder.
Below 500 RPM timing goes to 0 BTDC for starting purposes. Above 500 RPM, set a line from 22 degrees to 25 degrees, running from 500-2000 RPM. That is the NO MAP timing vs. RPM. The last numbers set the timing adder for the MAP input. With High vacuum (idle) timing adds the 10 degrees to the RPM curve. At full map (low vacuum), the timing adder goes to 0. Timing is interpolated in between.
I revised the title of the chart to fix this error (10 vs. 100).
I believe you are referring to one of my posts.
https://southernairboat.com/phpBB3/viewtopic.php?p=692930#p692930
You had me scratching my head over the last number (80 vs 10), so I double checked and I was off by a decimal place, my last number is 100 not 10. So I have updated those posts accordingly. Thanks for catching my error!
When I first installed my Pacemaker, I made the same mistake as you did and used the numbers that were in it. Boy did it run like crap. Basically, the unit is NOT adjusted on delivery, don't run without setting properly.
Just to repeat the decode, I will use the numbers I am running:
220 = 22.0 degrees BTDC base timing
2000 = RPM that MAP is cut off and timing is set to end timing
250 = 25.0 degrees BTDC max timing
100 = 10.0 degrees MAP/Idle adder.
Below 500 RPM timing goes to 0 BTDC for starting purposes. Above 500 RPM, set a line from 22 degrees to 25 degrees, running from 500-2000 RPM. That is the NO MAP timing vs. RPM. The last numbers set the timing adder for the MAP input. With High vacuum (idle) timing adds the 10 degrees to the RPM curve. At full map (low vacuum), the timing adder goes to 0. Timing is interpolated in between.
I revised the title of the chart to fix this error (10 vs. 100).
Slidin Gator
Well-known member
Coil pack mounts on engine, one coil feeds twp spark plugs, one each on two different cylinders that are on opposite strokes. So if a coil goes bad you still have one plug each firing. Timing pickup, mine is on flywheel but I understand the options vary for different engines. Control box for adjusting settings and then a vacuum tube to a hole you drill and tap on carb or injection throttle. It’s actually pretty easy to install.
Slidin Gator
Well-known member
Using a 6 cylinder as an example. In one revolution, 3 cylinders fire 120 degrees apart, the next revolution the other 3 fire. So there are 2 cylinders in pairs that reach TDC at the same time, one on the power stroke and one on the exhaust stroke.
There are 2 coils dedicated to these 2 cylinders. So when the 2 coils fire (at the same time) they light off the cylinder on the power stroke and also fire the plugs on the other cylinder, but it is on the exhaust stroke, so nothing happens.
There are 2 coils dedicated to these 2 cylinders. So when the 2 coils fire (at the same time) they light off the cylinder on the power stroke and also fire the plugs on the other cylinder, but it is on the exhaust stroke, so nothing happens.
Slidin Gator
Well-known member
12 plugs, 6 coils. Each coil has 2 plug wires.
One coil runs top plug on one cylinder, bottom plug on the other. Vice versa for the second coil.
One coil runs top plug on one cylinder, bottom plug on the other. Vice versa for the second coil.
John Fenner
Well-known member
One coil, 2 plugs to fire, 1 plug fires say cylinder 1 on compression stroke, and other fires cylinder 2 on exhaust stroke, coil packs and driver determine which amount of cylinders to fire and sequence, tone ring on flywheel determines TDC and RPM to run the sequence to driver.
John Fenner
Well-known member
Ok, I searched this thread for a reason, get this,,, a Jurnigan built Parallel valve O-540, spinning a,,,,, ready for this? 70" Sensenich 5 blade at an average of 7.5° as the pitch is all over the place, varying from 8 to 7° only 2700 RPM, I told the kid that either his engine is real tired or the pacemaker is not set up right, BINGO! The unit is showing these numbers as follows, 260-1494-251-024, I will be setting the unit up as you have suggested and will likely, have to add about 4° pitch to that airscrew, thank you for the knowledge, as many have said before, this site and it's members are a grand resource of knowledge!
diamondback0320
Well-known member
I would try 22.0 1800 26.0 08.0