There are only a few good ones, NGK or TRD by Denso.

 

hup. NGK or Denso Iridium.

 

i got the denso iridium IK20 on mine

 

Denso Iridium IK20

But be ready to spend $40-$60 for a set.

Worth the money since our cars were made to run with Denso's, tho people say there really isn't a difference. To me, I'd rather have a specific brand name.

 

Oh theres a difference allright - install some autolites and you'll find out just how crappy the wrong plugs can be.

Yeah Denso Irridiumss are the way to go.

 

I have heard that when you instal nitrous you need to run cooler plugs.
Which plugs are those?
got a item number?

 

I have heard that when you instal nitrous you need to run cooler plugs.
Which plugs are those?
got a item number?

Probably IK24s for a 75 or 50 shot, IK22s for a 35 shot

 

TRD plugs are Denso plugs.

The GT uses Denso IK16 stock, the GT-S uses IK20 stock. I'd take Boosted's advice on plugs for forced induction.

You can also use NGK Iridium IX plugs as a substitute for the Denso. BKR6EIX-11 is the equivalent of IK20. Change the 6 in that part number to 7 or 8 for IK22, IK24. You'll notice that when you get to BKR8EIX, they drop the -11 off the end of the part number. This is because a BKR6EIX-11 and an IK20 have a 1.1mm (0.044") plug gap. Denso does not specify this, but the IK24 has a smaller gap (around 0.032"), same as the NGK.

Copper plugs are a dated idea. Lots of people used to use them when iridium plugs were unreliable and would break off in turbo applications. Copper plugs work great, but need to be changed every few thousand miles. Modern iridium plugs are much better and you should stick with those.

 

i use trd ik22's in mine. i run 50 shot.

 

nubby ass question but o well... i have an 03 gt. would i get a hp gain from plugs?

 

oppssss ... I trhink Im ussing the wrong plugs !!!

Im ussing (NGK V-POWER) on the side of the box it said (NGK FR4 STOCK NO. 5155)

I don't know much about spark plugs really ...

 

TRD Iridium or TRD Platium spark plugs

 

i got mine from karacing(trd denso iridium ik22). very good!!!

 

The GT uses Denso IK16 stock, the GT-S uses IK20 stock.

Actually, the stockers are Denso Ultra Long Life Iridium versions (the electrode tips are slightly larger & less brittle than the IK's - 0.7mm vs. 0.4mm)... for a GT-S = Denso SK20R11. They last longer & are less expensive (around $8 ea. with a 60K change interval... but have been known to last up to 120K) than the IK's.

The IK20's will give slightly better performance... but won't last as long ("Because gradual wear will

 

Actually, the stockers are Denso Ultra Long Life Iridium versions (the electrode tips are slightly larger & less brittle than the IK's - 0.7mm vs. 0.4mm)... for a GT-S = Denso SK20R11. They last longer & are less expensive (around $8 ea. with a 60K change interval... but have been known to last up to 120K) than the IK's.

The IK20's will give slightly better performance... but won't last as long ("Because gradual wear will

 

ok so i have an 03 gt... what would be the best ones for me to get performance wise?

 

i got mine from karacing(trd denso iridium ik22). very good!!!

:thumbup:

 

Why ik is supposed to perform better?? plate design, gap, metal used?

IK's smaller center electrode "reduces the voltage requirements, concentrating its sparking power. Also, its smaller size, combined with the tapered U-Groove ground electrode, allows more room for the flame kernel to develop and produce a more efficient combustion." But, its smaller center electrode is also the reason why the change interval is quicker.

The SKs have all the same advantages, with the exception of slightly higher voltage requirements and slightly less flame room than the IKs... you're only talking a 0.3mm tip difference. Plus, the SKs have the Platinum tipped ground... that the IKs don't.

 

They also don't have to be gapped.

 

They also don't have to be gapped.

But it is good idea to check them before installation.

 

nubby ass question but o well... i have an 03 gt. would i get a hp gain from plugs?

Not likely.

 

But it is good idea to check them before installation.

:werd:

nubby ass question but o well... i have an 03 gt. would i get a hp gain from plugs?

Not likely.

:werd:

To quote Denso, again:

"Q. What kind of performance will I get from this plug?
A. Generally, you do not purchase spark plugs for performance enhancement. While DENSO Iridium Power spark plugs have contributed to numerous accomplishments through dyno-testing and actual use, their true benefit lies in their efficiency, durability, and improved firing power. Serious tuners modify their vehicles by increasing boost through turbo-chargers, super-chargers, and Nitrous. They are also known to add high-energy ignition systems, tinker with timing, adjust fuel mixture ratios, and increase horsepower through other means. Putting these kinds of demands on their engine increases the need for an efficient, durable spark plug that can handle these kind of harsh environments. That

 

Yup. You can gain power from plugs with FI, only in that they aloow you to run more timing without detonation, but thats the tune making the power not a difference in the plug itself.

 

Yup. You can gain power from plugs with FI, only in that they aloow you to run more timing without detonation, but thats the tune making the power not a difference in the plug itself.

What about NA? No noticable timing increase possible I assume from your comments? So still, ik-20 or sk-20 will do the job perfectly for NA?

Thanks!

 

Yup. You can gain power from plugs with FI, only in that they aloow you to run more timing without detonation, but thats the tune making the power not a difference in the plug itself.

What about NA? Not noticable I assume from your comments? So still, ik-20 or sk-20 will do the job perfectly for NA?

Thanks!

They can be useful on a full boogey NA 2ZZ motor with power FC, but a GT with bolts ons wont profit.