I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition and a
msd blaster coil. I am wondering what is the tune up speck for my set up.
timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read on a
website that when changing to the ford TFI ignition that I could put
different spring (Mr. gasket part # 925d) in the centrifugal timing advance
to get more advance on high rpm's. should I put the different spring in?
anyone have any advice. carmine

 

Hi Carmine,
It's HEI (High Energy Ignition) It's not more advance, it's
quicker. I believe you'll be happier with the stock springs, following
your horse power curve, reaching full advance around thirty five hundred
RPMs. The weaker springs you talk of are for race engines and they jump
to full advance by two grand, it has an advantage on the drag strip, but
not for Jeepin'. What I believe is perfect timing is a total of thirty
eight degrees on the crank. You'll need a special timing light to check
for total. Or know exactly what your distributor's specs are.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Jet wrote:
>
> I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition and a
> msd blaster coil. I am wondering what is the tune up speck for my set up.
> timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read on a
> website that when changing to the ford TFI ignition that I could put
> different spring (Mr. gasket part # 925d) in the centrifugal timing advance
> to get more advance on high rpm's. should I put the different spring in?
> anyone have any advice. carmine

 

Hi Carmine,
It's HEI (High Energy Ignition) It's not more advance, it's
quicker. I believe you'll be happier with the stock springs, following
your horse power curve, reaching full advance around thirty five hundred
RPMs. The weaker springs you talk of are for race engines and they jump
to full advance by two grand, it has an advantage on the drag strip, but
not for Jeepin'. What I believe is perfect timing is a total of thirty
eight degrees on the crank. You'll need a special timing light to check
for total. Or know exactly what your distributor's specs are.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Jet wrote:
>
> I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition and a
> msd blaster coil. I am wondering what is the tune up speck for my set up.
> timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read on a
> website that when changing to the ford TFI ignition that I could put
> different spring (Mr. gasket part # 925d) in the centrifugal timing advance
> to get more advance on high rpm's. should I put the different spring in?
> anyone have any advice. carmine

 

Hi Carmine,
It's HEI (High Energy Ignition) It's not more advance, it's
quicker. I believe you'll be happier with the stock springs, following
your horse power curve, reaching full advance around thirty five hundred
RPMs. The weaker springs you talk of are for race engines and they jump
to full advance by two grand, it has an advantage on the drag strip, but
not for Jeepin'. What I believe is perfect timing is a total of thirty
eight degrees on the crank. You'll need a special timing light to check
for total. Or know exactly what your distributor's specs are.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Jet wrote:
>
> I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition and a
> msd blaster coil. I am wondering what is the tune up speck for my set up.
> timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read on a
> website that when changing to the ford TFI ignition that I could put
> different spring (Mr. gasket part # 925d) in the centrifugal timing advance
> to get more advance on high rpm's. should I put the different spring in?
> anyone have any advice. carmine

 

I put TFI (thick film integrated) ignition on my jeep it is a ford ignition
from a 81 f150 300cid i-6 engine. it is much easier to install than HEI
there is no need to pull the distributor just screw on the ford distributor
base plate and install the rotor,ford cap,wires, and regap the plugs to
..0045. I also installed a msd blaster coil to bring the ignition up to
45,000 volts. carmine


"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3FAC7486.CEC0AB9@***.net...
> Hi Carmine,
> It's HEI (High Energy Ignition) It's not more advance, it's
> quicker. I believe you'll be happier with the stock springs, following
> your horse power curve, reaching full advance around thirty five hundred
> RPMs. The weaker springs you talk of are for race engines and they jump
> to full advance by two grand, it has an advantage on the drag strip, but
> not for Jeepin'. What I believe is perfect timing is a total of thirty
> eight degrees on the crank. You'll need a special timing light to check
> for total. Or know exactly what your distributor's specs are.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Jet wrote:
> >
> > I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition
and a
> > msd blaster coil. I am wondering what is the tune up speck for my set
up.
> > timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read
on a
> > website that when changing to the ford TFI ignition that I could put
> > different spring (Mr. gasket part # 925d) in the centrifugal timing
advance
> > to get more advance on high rpm's. should I put the different spring in?
> > anyone have any advice. carmine

 

I put TFI (thick film integrated) ignition on my jeep it is a ford ignition
from a 81 f150 300cid i-6 engine. it is much easier to install than HEI
there is no need to pull the distributor just screw on the ford distributor
base plate and install the rotor,ford cap,wires, and regap the plugs to
..0045. I also installed a msd blaster coil to bring the ignition up to
45,000 volts. carmine


"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3FAC7486.CEC0AB9@***.net...
> Hi Carmine,
> It's HEI (High Energy Ignition) It's not more advance, it's
> quicker. I believe you'll be happier with the stock springs, following
> your horse power curve, reaching full advance around thirty five hundred
> RPMs. The weaker springs you talk of are for race engines and they jump
> to full advance by two grand, it has an advantage on the drag strip, but
> not for Jeepin'. What I believe is perfect timing is a total of thirty
> eight degrees on the crank. You'll need a special timing light to check
> for total. Or know exactly what your distributor's specs are.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Jet wrote:
> >
> > I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition
and a
> > msd blaster coil. I am wondering what is the tune up speck for my set
up.
> > timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read
on a
> > website that when changing to the ford TFI ignition that I could put
> > different spring (Mr. gasket part # 925d) in the centrifugal timing
advance
> > to get more advance on high rpm's. should I put the different spring in?
> > anyone have any advice. carmine

 

I put TFI (thick film integrated) ignition on my jeep it is a ford ignition
from a 81 f150 300cid i-6 engine. it is much easier to install than HEI
there is no need to pull the distributor just screw on the ford distributor
base plate and install the rotor,ford cap,wires, and regap the plugs to
..0045. I also installed a msd blaster coil to bring the ignition up to
45,000 volts. carmine


"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3FAC7486.CEC0AB9@***.net...
> Hi Carmine,
> It's HEI (High Energy Ignition) It's not more advance, it's
> quicker. I believe you'll be happier with the stock springs, following
> your horse power curve, reaching full advance around thirty five hundred
> RPMs. The weaker springs you talk of are for race engines and they jump
> to full advance by two grand, it has an advantage on the drag strip, but
> not for Jeepin'. What I believe is perfect timing is a total of thirty
> eight degrees on the crank. You'll need a special timing light to check
> for total. Or know exactly what your distributor's specs are.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Jet wrote:
> >
> > I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition
and a
> > msd blaster coil. I am wondering what is the tune up speck for my set
up.
> > timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read
on a
> > website that when changing to the ford TFI ignition that I could put
> > different spring (Mr. gasket part # 925d) in the centrifugal timing
advance
> > to get more advance on high rpm's. should I put the different spring in?
> > anyone have any advice. carmine

 

Carmine,

Bill is generally correct, but you may want to at least try the weaker
spring. Getting the mechanical advance to come in a little sooner will
benefit you at lower RPMs, as long as it isn't advancing too much at idle.
If this is the case, you will have problems getting the motor to idle
properly.

Try putting in the spring, then use a set back timing light to set your
total advance to 36 degrees or so at 3000 RPMs. Don't worry about the
initial setting, as that will now be a by product of the adjustment for
total advance. In other words because you have now adjusted the timing with
the engine running at 3000, the initial setting will now be determined by
where the distributor ends up being rotated to, and won't really matter as
long as the engine runs well, is responsive, doesn't knock, and doesn't
kickback on the starter. A lot to keep in mind for sure, but this method
usually produces good results.

RR
"Jet" <jet@bestweb.net> wrote in message
news:vqonoqieop8k4b@corp.supernews.com...
> I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition and
a
> msd blaster coil. I am wondering what is the tune up speck for my set up.
> timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read on
a
> website that when changing to the ford TFI ignition that I could put
> different spring (Mr. gasket part # 925d) in the centrifugal timing
advance
> to get more advance on high rpm's. should I put the different spring in?
> anyone have any advice. carmine
>
>

 

Carmine,

Bill is generally correct, but you may want to at least try the weaker
spring. Getting the mechanical advance to come in a little sooner will
benefit you at lower RPMs, as long as it isn't advancing too much at idle.
If this is the case, you will have problems getting the motor to idle
properly.

Try putting in the spring, then use a set back timing light to set your
total advance to 36 degrees or so at 3000 RPMs. Don't worry about the
initial setting, as that will now be a by product of the adjustment for
total advance. In other words because you have now adjusted the timing with
the engine running at 3000, the initial setting will now be determined by
where the distributor ends up being rotated to, and won't really matter as
long as the engine runs well, is responsive, doesn't knock, and doesn't
kickback on the starter. A lot to keep in mind for sure, but this method
usually produces good results.

RR
"Jet" <jet@bestweb.net> wrote in message
news:vqonoqieop8k4b@corp.supernews.com...
> I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition and
a
> msd blaster coil. I am wondering what is the tune up speck for my set up.
> timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read on
a
> website that when changing to the ford TFI ignition that I could put
> different spring (Mr. gasket part # 925d) in the centrifugal timing
advance
> to get more advance on high rpm's. should I put the different spring in?
> anyone have any advice. carmine
>
>

 

Carmine,

Bill is generally correct, but you may want to at least try the weaker
spring. Getting the mechanical advance to come in a little sooner will
benefit you at lower RPMs, as long as it isn't advancing too much at idle.
If this is the case, you will have problems getting the motor to idle
properly.

Try putting in the spring, then use a set back timing light to set your
total advance to 36 degrees or so at 3000 RPMs. Don't worry about the
initial setting, as that will now be a by product of the adjustment for
total advance. In other words because you have now adjusted the timing with
the engine running at 3000, the initial setting will now be determined by
where the distributor ends up being rotated to, and won't really matter as
long as the engine runs well, is responsive, doesn't knock, and doesn't
kickback on the starter. A lot to keep in mind for sure, but this method
usually produces good results.

RR
"Jet" <jet@bestweb.net> wrote in message
news:vqonoqieop8k4b@corp.supernews.com...
> I have a 86 cj7 with a 258 no emissions, Weber carb TFI ford ignition and
a
> msd blaster coil. I am wondering what is the tune up speck for my set up.
> timing for 87 octane and 93 octane, idle rpm's, fast idle. also I read on
a
> website that when changing to the ford TFI ignition that I could put
> different spring (Mr. gasket part # 925d) in the centrifugal timing
advance
> to get more advance on high rpm's. should I put the different spring in?
> anyone have any advice. carmine
>
>