V8kilr

should i disconnect both vacume lines from the dizzy?
i have an 84 gs.

or just one,
if one which one?

REVHED

Definately disconnect them both.

moremazda

iTrader: (4)

Get rid of them both, cap the fitting on the manifold. Leave the dizzy uncapped, if you cap the fittings on the dizz it will keep the mechanical advance from fully advancing the timing.

V8kilr

wow that was quick,
thanks fellas

also can i just cap it at the rats nest instead of tracing them down to where ever they go on the manifold?

moremazda

iTrader: (4)

Yes, but if you are pulling off the vacume advance, what is the point of leaving the rats nest?

jeremy

iTrader: (1)

should do the same thing as at the manifold.

crankit

why you disconnecting the vacuum advance?

ASEmaster

my question exactly... what is the advantage to disconnecting the vacuum advance?

V8kilr

ok so i finally checked my timing since the first time i set it it was set at 1,000 rpm to just a hair above stock setting, tdc

i noticed it was advanced to far at 3,000 rpm so i backed it down,

i also reset the trailing timing


after it was all said and done i cleaned up everything and was ready for a ride,
well it would barely start,

i popped the hood and noticed i forgot to tighten up the dizzy "DUH"

reset the leading and went for a joy ride,

holy **** i only drove about 5 blocks but noticed all my backfire in between shifts is gone!!!!!

insane,

will confirm this tommorow

REVHED

So how much total advance are you running?

V8kilr

hell if i know i havent put the marks on my pulley yet,

it looks like i was runnign way to mych advance but if i retarded anymore the dizzy would stop turning because it was as far retarded as it would go,

from the looks of this pulley click here if the yellow marks are the leading and their in 5 degree increments then i would say im running a 10 degree advance at 3,000 rpm

however if the orange marks count as well then im running a 20 degree advance at 3,000 rpm and about 5 at idle

crankit

Capping the fittings at the dist. will not stop the advance form fully advancing. Althought you do have more with them connected. Seen it with advance timing light

V8kilr

does anyone know what the pulley marks are in the link i attached?

crankit

Looks like top one is 20atdc ,tdc,5btdc,10btdc,15btdc,20btdc,25btdc,and 30
btdc