Author Topic: Looking for ideas on an Engine purchase & pickup  (Read 26896 times)

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Offline 75starflight

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Re: Looking for ideas on an Engine purchase & pickup
« Reply #80 on: March 23, 2016, 12:59:35 PM »
you are correct in your thinking Doran.
1975 v-179 starflite

Offline Plugcheck

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Re: Looking for ideas on an Engine purchase & pickup
« Reply #81 on: March 23, 2016, 02:53:17 PM »
     Just to add a bit of understanding.   The resistance or ballast does in fact reduce the voltage on the coils input, the actual value being based upon the coil itself, and the amount of time the coil is charging(Points Closed).   At low RPM's the dwell time is quite high compared to the dwell time at high RPM.  When the coil was designed it had to be able to produce a sufficient spark at high RPM so its impedance is matched to draw enough energy at low dwell time to produce suitable spark.  At low RPM/High Dwell time, if no resistance was inserted to stem current flow charging the coil, it would eventually overheat and fail.  Usually this is accompanied with a bunch of hot mineral oil spewing forth all over your pretty engine.  One of the biggest advantages to electronic ignition is called adaptive dwell.  The circuitry always maintains the correct dwell time for the coil at various RPMs thereby always insuring a full spark output.  Another bonus, no ballast, chokes, resistance wires, etc which can and do change values over time.   
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline Rich_V174SS

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  • 1967 V174 Crestflite SuperSport Modified
Re: Looking for ideas on an Engine purchase & pickup
« Reply #82 on: March 23, 2016, 06:06:24 PM »
So someone tried mounting a ballast resistor? Where was power being tapped from to power it?
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline dorelse

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Re: Looking for ideas on an Engine purchase & pickup
« Reply #83 on: March 23, 2016, 06:47:01 PM »
So someone tried mounting a ballast resistor? Where was power being tapped from to power it?

Don't know...the resistor was there, but no wires.
1990 Sierra 1700

Offline Rich_V174SS

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  • 1967 V174 Crestflite SuperSport Modified
Re: Looking for ideas on an Engine purchase & pickup
« Reply #84 on: March 23, 2016, 07:36:24 PM »
If you convert to a Pertronix EI sensor you still need the resistance wire or ballast if you use the original coil. At least, that's what I've been doing and it's been running without any problems. I do, however, connect the Pertronix positive lead at the choke connection before the resistance wire instead of at the coil. This way the sensor always has full power and won't wimp out if you run your trim motor or other accessories.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline dorelse

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Re: Looking for ideas on an Engine purchase & pickup
« Reply #85 on: March 26, 2016, 07:50:51 PM »
$29.00 later, the exhaust is here.
1990 Sierra 1700

Offline Rich_V174SS

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Re: Looking for ideas on an Engine purchase & pickup
« Reply #86 on: March 27, 2016, 07:26:05 AM »
You got the upper boot that connects it to the elbow/coolant reservoir?
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline dorelse

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Re: Looking for ideas on an Engine purchase & pickup
« Reply #87 on: March 28, 2016, 09:10:06 AM »
You got the upper boot that connects it to the elbow/coolant reservoir?

I do, that one came with the engine.
1990 Sierra 1700

Offline dorelse

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Re: Looking for ideas on an Engine purchase & pickup
« Reply #88 on: April 08, 2016, 10:30:02 PM »
A little creative ingenuity, and the proper leverage...I was able to get the motor moved to a larger stand.  Larger wheels and room for a battery, gas & gauges.
1990 Sierra 1700