Bill, someone or several have told me that the 258 tops out the timing
around 2300 rpm.

Do you know for sure?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> 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

 

Bill, someone or several have told me that the 258 tops out the timing
around 2300 rpm.

Do you know for sure?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> 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

 

Bill, someone or several have told me that the 258 tops out the timing
around 2300 rpm.

Do you know for sure?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> 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 Mike,
I was just guessing as to what a Jeep may be, here's a graph of the
typical advance curves for a stock engine:
http://www.jcna.com/library/tech/images/tech0015o.jpg
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Bill, someone or several have told me that the 258 tops out the timing
> around 2300 rpm.
>
> Do you know for sure?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

 

Hi Mike,
I was just guessing as to what a Jeep may be, here's a graph of the
typical advance curves for a stock engine:
http://www.jcna.com/library/tech/images/tech0015o.jpg
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Bill, someone or several have told me that the 258 tops out the timing
> around 2300 rpm.
>
> Do you know for sure?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

 

Hi Mike,
I was just guessing as to what a Jeep may be, here's a graph of the
typical advance curves for a stock engine:
http://www.jcna.com/library/tech/images/tech0015o.jpg
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Bill, someone or several have told me that the 258 tops out the timing
> around 2300 rpm.
>
> Do you know for sure?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

 

Hi Carmine,
Thanks for the education. Apparently I've using the system in my
Fords without knowing it's name. Of course, a rose by any other name
would smell as sweet -Shakespeare
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Jet wrote:
>
> 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

 

Hi Carmine,
Thanks for the education. Apparently I've using the system in my
Fords without knowing it's name. Of course, a rose by any other name
would smell as sweet -Shakespeare
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Jet wrote:
>
> 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

 

Hi Carmine,
Thanks for the education. Apparently I've using the system in my
Fords without knowing it's name. Of course, a rose by any other name
would smell as sweet -Shakespeare
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Jet wrote:
>
> 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

 

Hi Mike,

If that is the case, Carmine is probably already getting a decent curve.
2300 is pretty quick for a OEM situation, but all the better as "the quicker
the better" is true to an extent. I've worked on many "performance motors",
where the mechanical advance was still advancing past 4 grand. That is way
to slow, even for a stock motor, irregardless of how many cylinders it has.

Rick



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:3FAD2064.60008CFE@sympatico.ca...
> Bill, someone or several have told me that the 258 tops out the timing
> around 2300 rpm.
>
> Do you know for sure?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> "L.W.(ßill) ------ III" wrote:
> >
> > 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