hey guys my name's Aaron I'm running a programmable ignition on my Datsun here
with the lock distributor an important process to getting that functional is
phasing your distributor now if you don't know what that is or you're trying
to do that yourself chances are this video will help you
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so what is phasing a
distributor if you're running a locked distributor it is fixed to the
characteristics of the engine meaning it when it the engine rotates a certain
distance so will the distributor naturally your ignition timing will
advance somewhere in your engine your map will vary depending on your behaviour
but still your ignition timing advances when your rpm advances unlike coil over
plug which doesn't rely on a mechanical component to transfer an ignition
through into the engine where it sits it's a coil sitting on top of a plug in
it will go when it's told to go by the computer with a distributed system you
have an ignition coil or a CDI box and it transfers a high voltage through a
rotor button and distributor cap in your distributor to the correct cylinder of
the engine so you're limited by that so what phasing is doing is making sure
that your distributor's physically positioned such that when your ignition
advances it doesn't run off the end of the distributor button and always
travels through the distributor cap into that of correct cylinder so most
distributors will be limited by the width of the rotor button the where it
contacts into the pin of the distributor cap it allows for a nominal amount of
advance and you what you want to do is make for that rotor button is positioned
in a certain position so that when it does advance it actually doesn't run off
the end of that and you maintain your ignition so what does that mean in the
real world for facing a distributor will jump over to my distributor now and
hopefully that will just demonstrate what phasing is so I'm over here at my
engine now this is an optical distributor on my L28 stroker motor
essentially just in a nutshell phasing a distributor is making sure your rotor
button and rotor pin actually do their job so that they transfer spark to
the engine for that required advance all you're doing is adjusting the
distributor housing such that
the pins for you the your cylinders when they in there when it does fire
that your rotor button is in a position that it connects the pin and sends the
ignition to the engine other things you might have to do depending on your
sensor location if it's in the distributor whatever you adjust your
distributor housing so that you distributors phase you may have to
change your offset trigger angle in your sensor in my case I will have to do that
because my optical sensors in the distributor if your sensors on the
crankshaft whatever you do to the housing make no difference because it's
the the readings coming directly from the crank and not influenced by the
position of the distributor housing when before you get into this you need to
understand a few properties of your distributor one being well the primary
one being them how much advanced degrees advanced your rotor button physically
has within the rotor button I know this is 22 millimeters wide that's a 44
millimeters radius working at trigonometry this is 30 degrees arc now
times it by 2 because this is spins well in my instance this spins half as fast
as the crankshaft so I have allowable 60 degrees advance within this air
crankshaft degrees advance within this distributor so really where you set your
starting point depends on your ignition map now I know that I'm going to have no
less than 15 degrees before top dead center ignition in my map so the engine
set up to 10 degrees before top dead center and I'll just put the distributor
cap back on some of the one is this fellow here and I've got a cylinder one
homing mark marked on the distributor housing as you can see it's aligned
there which did overlaps with the distributor rotor button which means
that 10 degrees before top dead center thus the spark would transfer into the
ignition lead so I'm happy at 10 degrees before top dead center that the rotor
buttons going to transfer ignition so now I'll swap this to 45 degrees before
top dead center and show you where the rotor button sits in position to the
cylinder 1 homing mark the engines now rotated to 45 degrees before top dead
center so remember this is cylinder 1 and my cylinder 1 homing mark is there
you can see that it is still within on the rotor button
and would align with the pin on the distributor cap so 45 degrees before top
dead center I'm comfortable knowing that the rotor button will be in a position
such that it will contact with the tab for cylinder one within the distributor
cap and get my ignition charge through to the spark plug to the cylinder and
everything work so that's phasing a distributor all
you're really trying to do is get the physical properties that we distributed
to a line such that when your timing map ignition advance is executed that you
get a closed circuit and your ignition functions so if your program will
ignition user so whether using a full EFI setup or maybe like a 1-2-3 ignition
or maybe a MSD programmable CDI box I hope that helped you and if it did
appreciate a like that helps my small channel add a lot and it also helps get
this information to people who benefit the most so thank you for watching I
appreciated that you actually watched all this to the end of the video and
I'll catch you in the next one thanks