William Oliveri

Before I put my older model MPI kit on my jeep I had a different ignition
system called the Juice Box. This had the higher output ignition coil,
bigger gauge spark plug wires and distributor cap and body modifications.

When I put the MPI kit on I left the larger gauge spark plug wires (I
believe 8mm). Will this have a negative effect on my jeep's performance?
Should I go back to stock wires?

How can different spark plug wire sizes affect engine performance?

thanks,

Bill

Mike Romain

Only by limiting higher voltages or higher performance spark systems I
believe.

I have found that the bigger Accel wires were total crap and I went back
to stock OEM wires even with my hot Accel SuperCoil. I got a definite
improvement when I switched to stock wires. I was in the middle of a 10
day bush run and came out to find a Chrysler Jeep dealer the closest for
new wires.

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

William Oliveri wrote:
>
> Before I put my older model MPI kit on my jeep I had a different ignition
> system called the Juice Box. This had the higher output ignition coil,
> bigger gauge spark plug wires and distributor cap and body modifications.
>
> When I put the MPI kit on I left the larger gauge spark plug wires (I
> believe 8mm). Will this have a negative effect on my jeep's performance?
> Should I go back to stock wires?
>
> How can different spark plug wire sizes affect engine performance?
>
> thanks,
>
> Bill

Mike Romain

Only by limiting higher voltages or higher performance spark systems I
believe.

I have found that the bigger Accel wires were total crap and I went back
to stock OEM wires even with my hot Accel SuperCoil. I got a definite
improvement when I switched to stock wires. I was in the middle of a 10
day bush run and came out to find a Chrysler Jeep dealer the closest for
new wires.

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

William Oliveri wrote:
>
> Before I put my older model MPI kit on my jeep I had a different ignition
> system called the Juice Box. This had the higher output ignition coil,
> bigger gauge spark plug wires and distributor cap and body modifications.
>
> When I put the MPI kit on I left the larger gauge spark plug wires (I
> believe 8mm). Will this have a negative effect on my jeep's performance?
> Should I go back to stock wires?
>
> How can different spark plug wire sizes affect engine performance?
>
> thanks,
>
> Bill

Mike Romain

Only by limiting higher voltages or higher performance spark systems I
believe.

I have found that the bigger Accel wires were total crap and I went back
to stock OEM wires even with my hot Accel SuperCoil. I got a definite
improvement when I switched to stock wires. I was in the middle of a 10
day bush run and came out to find a Chrysler Jeep dealer the closest for
new wires.

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

William Oliveri wrote:
>
> Before I put my older model MPI kit on my jeep I had a different ignition
> system called the Juice Box. This had the higher output ignition coil,
> bigger gauge spark plug wires and distributor cap and body modifications.
>
> When I put the MPI kit on I left the larger gauge spark plug wires (I
> believe 8mm). Will this have a negative effect on my jeep's performance?
> Should I go back to stock wires?
>
> How can different spark plug wire sizes affect engine performance?
>
> thanks,
>
> Bill

Cherokee-LTD

The only "juice box" I am familiar with are the ones my daughters leave half
full in the kitchen and they squirt juice out the straw when you grab them
(thinking they're empty).

Your engine deserves the best spark possible to burn clean. Heavy gauge
wires help the flow of electricity... like pushing a golf ball through a 2"
tube versus through a straw.

-Brian

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bu6te5$ej8ol$1@ID-193866.news.uni-berlin.de...
: Before I put my older model MPI kit on my jeep I had a different ignition
: system called the Juice Box. This had the higher output ignition coil,
: bigger gauge spark plug wires and distributor cap and body modifications.
:
: When I put the MPI kit on I left the larger gauge spark plug wires (I
: believe 8mm). Will this have a negative effect on my jeep's performance?
: Should I go back to stock wires?
:
: How can different spark plug wire sizes affect engine performance?
:
: thanks,
:
: Bill
:
:
:
:
:
:

Cherokee-LTD

The only "juice box" I am familiar with are the ones my daughters leave half
full in the kitchen and they squirt juice out the straw when you grab them
(thinking they're empty).

Your engine deserves the best spark possible to burn clean. Heavy gauge
wires help the flow of electricity... like pushing a golf ball through a 2"
tube versus through a straw.

-Brian

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bu6te5$ej8ol$1@ID-193866.news.uni-berlin.de...
: Before I put my older model MPI kit on my jeep I had a different ignition
: system called the Juice Box. This had the higher output ignition coil,
: bigger gauge spark plug wires and distributor cap and body modifications.
:
: When I put the MPI kit on I left the larger gauge spark plug wires (I
: believe 8mm). Will this have a negative effect on my jeep's performance?
: Should I go back to stock wires?
:
: How can different spark plug wire sizes affect engine performance?
:
: thanks,
:
: Bill
:
:
:
:
:
:

Cherokee-LTD

The only "juice box" I am familiar with are the ones my daughters leave half
full in the kitchen and they squirt juice out the straw when you grab them
(thinking they're empty).

Your engine deserves the best spark possible to burn clean. Heavy gauge
wires help the flow of electricity... like pushing a golf ball through a 2"
tube versus through a straw.

-Brian

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bu6te5$ej8ol$1@ID-193866.news.uni-berlin.de...
: Before I put my older model MPI kit on my jeep I had a different ignition
: system called the Juice Box. This had the higher output ignition coil,
: bigger gauge spark plug wires and distributor cap and body modifications.
:
: When I put the MPI kit on I left the larger gauge spark plug wires (I
: believe 8mm). Will this have a negative effect on my jeep's performance?
: Should I go back to stock wires?
:
: How can different spark plug wire sizes affect engine performance?
:
: thanks,
:
: Bill
:
:
:
:
:
:

Steve G

Sorry Brian, not so. If you wanted the cleanest lowest resistance plug wire
a straight copper wire would work best. The thicker wires you see is
primarily the thickness of the insulation, not the conductor. An
interesting thing about secondary ignition systems is that the coil will
only put out as much voltage as is required to overcome the resistance in
the path it's going. If you're ever seen an engine on an old oscilliscope
you can see the secondary voltage to each plug. Pull the wire off and watch
it spike through the roof trying to jump that open in the circuit.
Resistance in the wire causes the coil to have to raise the voltage to
overcome it. When this higher voltage reaches the plug it's much
higher/hotter than would have been required to jump the gap with no
resitance to overcome on the way. The coil is tricked into creating this
higher voltage at the plug end.
Quality ignition wires means good insulation and sturdy carbon core that
won't break easily.
Steve
"Cherokee-LTD" <spammenot@home.com> wrote in message
news:ljDNb.47130$%wh.4491@news04.bloor.is.net.cabl e.rogers.com...
> The only "juice box" I am familiar with are the ones my daughters leave
half
> full in the kitchen and they squirt juice out the straw when you grab them
> (thinking they're empty).
>
> Your engine deserves the best spark possible to burn clean. Heavy gauge
> wires help the flow of electricity... like pushing a golf ball through a
2"
> tube versus through a straw.
>
> -Brian
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:bu6te5$ej8ol$1@ID-193866.news.uni-berlin.de...
> : Before I put my older model MPI kit on my jeep I had a different
ignition
> : system called the Juice Box. This had the higher output ignition coil,
> : bigger gauge spark plug wires and distributor cap and body
modifications.
> :
> : When I put the MPI kit on I left the larger gauge spark plug wires (I
> : believe 8mm). Will this have a negative effect on my jeep's performance?
> : Should I go back to stock wires?
> :
> : How can different spark plug wire sizes affect engine performance?
> :
> : thanks,
> :
> : Bill
> :
> :
> :
> :
> :
> :
>
>

Steve G

Sorry Brian, not so. If you wanted the cleanest lowest resistance plug wire
a straight copper wire would work best. The thicker wires you see is
primarily the thickness of the insulation, not the conductor. An
interesting thing about secondary ignition systems is that the coil will
only put out as much voltage as is required to overcome the resistance in
the path it's going. If you're ever seen an engine on an old oscilliscope
you can see the secondary voltage to each plug. Pull the wire off and watch
it spike through the roof trying to jump that open in the circuit.
Resistance in the wire causes the coil to have to raise the voltage to
overcome it. When this higher voltage reaches the plug it's much
higher/hotter than would have been required to jump the gap with no
resitance to overcome on the way. The coil is tricked into creating this
higher voltage at the plug end.
Quality ignition wires means good insulation and sturdy carbon core that
won't break easily.
Steve
"Cherokee-LTD" <spammenot@home.com> wrote in message
news:ljDNb.47130$%wh.4491@news04.bloor.is.net.cabl e.rogers.com...
> The only "juice box" I am familiar with are the ones my daughters leave
half
> full in the kitchen and they squirt juice out the straw when you grab them
> (thinking they're empty).
>
> Your engine deserves the best spark possible to burn clean. Heavy gauge
> wires help the flow of electricity... like pushing a golf ball through a
2"
> tube versus through a straw.
>
> -Brian
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:bu6te5$ej8ol$1@ID-193866.news.uni-berlin.de...
> : Before I put my older model MPI kit on my jeep I had a different
ignition
> : system called the Juice Box. This had the higher output ignition coil,
> : bigger gauge spark plug wires and distributor cap and body
modifications.
> :
> : When I put the MPI kit on I left the larger gauge spark plug wires (I
> : believe 8mm). Will this have a negative effect on my jeep's performance?
> : Should I go back to stock wires?
> :
> : How can different spark plug wire sizes affect engine performance?
> :
> : thanks,
> :
> : Bill
> :
> :
> :
> :
> :
> :
>
>

Steve G

Sorry Brian, not so. If you wanted the cleanest lowest resistance plug wire
a straight copper wire would work best. The thicker wires you see is
primarily the thickness of the insulation, not the conductor. An
interesting thing about secondary ignition systems is that the coil will
only put out as much voltage as is required to overcome the resistance in
the path it's going. If you're ever seen an engine on an old oscilliscope
you can see the secondary voltage to each plug. Pull the wire off and watch
it spike through the roof trying to jump that open in the circuit.
Resistance in the wire causes the coil to have to raise the voltage to
overcome it. When this higher voltage reaches the plug it's much
higher/hotter than would have been required to jump the gap with no
resitance to overcome on the way. The coil is tricked into creating this
higher voltage at the plug end.
Quality ignition wires means good insulation and sturdy carbon core that
won't break easily.
Steve
"Cherokee-LTD" <spammenot@home.com> wrote in message
news:ljDNb.47130$%wh.4491@news04.bloor.is.net.cabl e.rogers.com...
> The only "juice box" I am familiar with are the ones my daughters leave
half
> full in the kitchen and they squirt juice out the straw when you grab them
> (thinking they're empty).
>
> Your engine deserves the best spark possible to burn clean. Heavy gauge
> wires help the flow of electricity... like pushing a golf ball through a
2"
> tube versus through a straw.
>
> -Brian
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:bu6te5$ej8ol$1@ID-193866.news.uni-berlin.de...
> : Before I put my older model MPI kit on my jeep I had a different
ignition
> : system called the Juice Box. This had the higher output ignition coil,
> : bigger gauge spark plug wires and distributor cap and body
modifications.
> :
> : When I put the MPI kit on I left the larger gauge spark plug wires (I
> : believe 8mm). Will this have a negative effect on my jeep's performance?
> : Should I go back to stock wires?
> :
> : How can different spark plug wire sizes affect engine performance?
> :
> : thanks,
> :
> : Bill
> :
> :
> :
> :
> :
> :
>
>