deanospony
Supporter 2023
I’m using a DUI with a Weber 32/36 and am thinking of switching to an 18 volt system. Other than the cost, is there any reason why I shouldn’t do this?
All Small Six Ignition
- Thread starter deanospony
- Start date
This relates to all small sixes
aussie7mains
Famous Member
So I take it you want to power the ignition with 18v, but the rest of the car with 12? Sounds very unnecessary.
I agree.
BTW you can make make a spark big enough to knock your socks off with a 12 volt system.
sure forum folks posting get the point, for others:
AC current can simply / cheaply be converted to less or more Voltage . 12V to 18V or 3V is a simple matter. The Spark Plug coil obvious example converting 12V or less to a couple of thousand volts - thousands of times / sec with interrupted DC.
DC current Voltage conversion is not so simple and less practical in past. To make AC out of DC for voltage step-up, originally -" Vibrator" devices simply opened and closed a set of contact points to make AC and then could be raised. With modern switching circuits, DC voltage conversion is simpler and incorporated into device if needed. Virtually all analog and digital electronics operate on DC internally.
hav e fun
the '50' Cvy analog tube radio has a smooth syrupy quality with music made for tubes. Occasionally at low idle , the 6V system inductive loss would 'freeze the vibrator' , meaning contact points would arc and weld together. Opening the vibrator can and using points' file could fix the radio ...
(now has replacement electronic device inside original vibrator can not susceptible to voltage drop - so far)
. 
AC current can simply / cheaply be converted to less or more Voltage . 12V to 18V or 3V is a simple matter. The Spark Plug coil obvious example converting 12V or less to a couple of thousand volts - thousands of times / sec with interrupted DC.
DC current Voltage conversion is not so simple and less practical in past. To make AC out of DC for voltage step-up, originally -" Vibrator" devices simply opened and closed a set of contact points to make AC and then could be raised. With modern switching circuits, DC voltage conversion is simpler and incorporated into device if needed. Virtually all analog and digital electronics operate on DC internally.
hav e fun
the '50' Cvy analog tube radio has a smooth syrupy quality with music made for tubes. Occasionally at low idle , the 6V system inductive loss would 'freeze the vibrator' , meaning contact points would arc and weld together. Opening the vibrator can and using points' file could fix the radio ...
(now has replacement electronic device inside original vibrator can not susceptible to voltage drop - so far)
. The DUI module limits the current flow to the ignition coil to 8 amps whether the supply voltage is 12 volts or 18 volts so there is no advantage as far as spark energy.
18 volts may be near the limit of the modules operating voltage causing the module to fail.
In short you should not run the DUI at 18 volts.
If you want a much hotter spark, you can add an MSD 6A to the DUI
Never knew any of this and I've been messing with oldies for almost 40 years. I love coming here and learning stuff like this. I'll probably never get to use the information but it's cool as hell to know!sure forum folks posting get the point, for others:
AC current can simply / cheaply be converted to less or more Voltage . 12V to 18V or 3V is a simple matter. The Spark Plug coil obvious example converting 12V or less to a couple of thousand volts - thousands of times / sec with interrupted DC.
DC current Voltage conversion is not so simple and less practical in past. To make AC out of DC for voltage step-up, originally -" Vibrator" devices simply opened and closed a set of contact points to make AC and then could be raised. With modern switching circuits, DC voltage conversion is simpler and incorporated into device if needed. Virtually all analog and digital electronics operate on DC internally.
hav e fun
the '50' Cvy analog tube radio has a smooth syrupy quality with music made for tubes. Occasionally at low idle , the 6V system inductive loss would 'freeze the vibrator' , meaning contact points would arc and weld together. Opening the vibrator can and using points' file could fix the radio ...
(now has replacement electronic device inside original vibrator can not susceptible to voltage drop - so far)
He seems like the only 2023 supporter, I cannot figure out how to do that, so he is smarter than me. Oh shut up!
often on any 'car forum' one asks the Q w/an answr already embeded in the Q.
Stating the sought for outcome'n asking how to get there can B a shorter (less pages)
method to a better answr. Not sure that's the case here.
Stating the sought for outcome'n asking how to get there can B a shorter (less pages)
method to a better answr. Not sure that's the case here.
Depending on your engine build neither the DUI or the HEI have the proper distributor curve.
The new DUI will starve the distributor shaft of oil & may seize.
The HEI has an over oiling condition.
I can fix both engineering ignorance.
The DS11 distributor is superior to any of the above. It has no oiling problems & can be recurved for what your engine needs.
Contact me @ billythedistributorman@live.com Bill wsa111
The new DUI will starve the distributor shaft of oil & may seize.
The HEI has an over oiling condition.
I can fix both engineering ignorance.
The DS11 distributor is superior to any of the above. It has no oiling problems & can be recurved for what your engine needs.
Contact me @ billythedistributorman@live.com Bill wsa111
I went performance w/DSII all the way. Affordable, easy, era correct...
As above I'd use the hybred (w/'GM 4 pin' in place of the 'brain') next time
(small, easier to source in times of failure than the ford module). 40,000 v
coil seems enuff, dizzy cap that fits tight space, no ballast resistor or extras...
As above I'd use the hybred (w/'GM 4 pin' in place of the 'brain') next time
(small, easier to source in times of failure than the ford module). 40,000 v
coil seems enuff, dizzy cap that fits tight space, no ballast resistor or extras...
