Description
Conventional
type
of
ignition
system
distributes
electricity
from
an
ignition
coil
to
each
spark
plug
through
spark
plug
wires.
On
the
other
hand,
direct
ignition
system
has
each
coil
pack
on
respective
spark
plugs.
So
an
increased
voltage
is
provided
to
each
spark
plug
directly
from
respective
coil
pack.
The
main
difference
between
plug
wires
and
direct
ignition
system
is
the
distance
between
coil
pack
and
spark
plug.
In
case
of
Plug
Wire
System,
the
voltage
is
increased
by
one
coil
pack
and
sent
to
respective
spark
plug
through
distributor
and
individual
plug
wires,
and
therefore,
the
voltage
will
be
decreased
at
each
process
before
the
electricity
reaches
to
spark
plug.
But,
in
case
of
Direct
Ignition
Systems,
each
coil
directly
sends
an
increased
voltage
to
spark
plug
without
any
loss
of
electricity.
Moreover,
the
best
ignition
timing
is
gained
by
computer
and
is
controlled
by
ECU
along
with
fuel
injection
system.
The
strong
point
of
Direct
Ignition
System
is
to
provide
an
accurate
ignition
and
to
maintain
stable
secondary
voltage
at
high
RPM.
Compatibility
If you have questions about vehicle fitment, please contact us.
Customer Questions
Question:
Hi, so now its time to replace coil packs on my NA 300zx i rebuild. I have checked and they all ready 0.2ohm, i had spares and they have same reading. In FMS it state that reading should be 0.7 ohm. Now my question is: you have 3 different types available Hitachi and OEM (based on description are same just price is different) and you have Splitfire Dis-009. Will i benefit from using Splitfire for my NA (almost stock) or should i go with original in which case Should i get OEM or Hitachi?
- Andrey
Answer:
We've generally found that the OEM coilpacks never match the ohm reading in the FSM, and it's very rare for the coilpacks for these cars to fail, so generally if they're all the same range you're good. But that said, SplitFires are an adequate replacement for the NA, as are HItachi. We don't generally believe Splitfire's claims that they make more power, because we've seen testing on the TT confirm that they actually make the same power up to about 20psi, at which point the stock coilpacks actually do bette
Question:
Would like to know how compatible these splitfires are versus the oem, which I still have on my car from 1990 Nissan 300zx non turbo , and do I need to buy other plugs or keep us using the ngk iridium ?
- Walter
Answer:
Hi Walter, they are a direct replacement for the OEM coilpacks and you can use the same plugs you're using (or Iridums, either works fine). We generally recommend sticking with OEM coilpacks for TTs up to 20+psi, at which point the Splitfires would start breaking up under boost. For the NA, it doesn't have this issue and they're suitable replacements for stock.