Subaru Outback Forums banner
  • Hey everyone! Enter your ride HERE to be a part of this month's Ride of the Month Challenge!

1 - 4 of 4 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter · #1 ·
Does anyone know of any specific item numbers for non-resistor
plugs for a 98 EJ25 normally aspirated?

I want the resistance between hv input to the center electrode to
be at a bare minimum.

I see the Champion 3346 are listed as non-resistor, but it could still
have suppression with high resistance. Does anyone know the
actual resistance for this plug?

Autolite XP3924 is also listed as non-resistor, but same thing. Does
anyone know the specs for the resistance? I can't find the details
online as if these are big secrets.

Any help would be appreciated.
 

·
Registered
Somebody Else's XT
Joined
·
14,447 Posts
Have you got some unusual setup? These cars seem to be a bit finicky for ignition, usually need the oem plugs & wires for normal performance.

Just curious what you're out to do.
 

·
Registered
Joined
·
3 Posts
Discussion Starter · #3 ·
Not on the car until I get the non-resistors.

It is a "plasma jet ignition" - it literally burns water on contact and the more compression and air you cram onto this form of plasma, the bigger it grows - completely opposite of conventional spark, cdi, msd, peaking caps, etc...

When it is properly tuned, there are no detectible emissions on a 5 gas analyzer.

I'm interested in fuel economy, not racing applications.

Any significant impedance in the path will prohibit the impulse from happening so it needs little to no resistance.
 

·
Registered
Joined
·
3 Posts
Discussion Starter · #4 ·
If anyone is interested in non-resistor plugs, here is what I found:

I wound up ordering the NGK R5671A-11, #6596 - it is the V-Groove racing plugs and they should fit perfectly. The total for 4 is about $15 delivered.
The response I got from NGK is that the only plug avail in the states for the EJ25 they make that are intended for a Subaru is the NGK BCP5ES, #7496 - that is a standard geometry non-resistor plug. These are only a couple $ a piece too.

Both of the above can be ordered through any local car parts store.
 
1 - 4 of 4 Posts
Top