MSP Spark plug options

[orng1]

Plugs mostly depend on boost or compression but in our case boost. If you are running stock boost then the stock plugs or a stock heat range will be fine, if you are running higher boost for extended periods of time then you'll need to get the colder plugs.

 

[SergMSP]

i noticed a difference in the Denso IK22's...colder, idle got better, also they come pregapped..forgot the gap amount..

 

[lisevolution]

So in your opinion's should I go the step colder to the 22's? Or should I go with the 20's or the NGK Iridium's?

 

[dannyboy17]

how come most of u gap the plugs at 0.32?

Heres what I got from densoiridium.com :
2003 MAZDA PROTEGE MAZDASPEED 2.0 L - L4 K20PR-U11 PK20PR11 IK20 0.044 / N/A

Also when I went by discount auto parts, the plugs said they had to be gapped at 0.44

 

[oldzoomer]

according to the shop manual:

Plug gap (mm {in}) 1.0—1.1 {0.040—0.043}

Here's the page from the shop manual:​

Spark plug
Type
NGK ZFR5F-11​

​

*7,
ZFR6F-11*8​

BKR5E-11​

​

*7,
BKR6E-11*8​

DENSO KJ16CR11​

​

*7,
KJ20CR11*8​

K16PR-U11​

​

*7,
K20PR-U11*8​

CHAMPION — RC10YC4​

​

*7, RC8YC4*8​

MAZDA — BP13 18 110​

​

*7,
BP14 18 110*8​

Plug gap (mm {in}) 1.0—1.1 {0.040—0.043}
Resistance NGK
3.0—7.5
(kilohms) DENSO
CHAMPION
— 5—15
MAZDA
Tightening torque (Nm {kgfm, ftlbf}) 15—22 {1.5—2.3, 11—16}

I thought somewhere else I had read .032 was correct but can't find that in any documentation.​

 

[Kansei]

I leave mine at 1.1mm

I still need to check my ZFR6F-11s to make sure they are cold enough for my setup.

 

[jmv]

okay, i'm looking at getting some colder plugs, are the ZFR6F-11 iridium or just the normal copper but one stage colder??

 

[Kansei]

the ZFR6F-11 is the same heat range as stock MSP plugs.. and they are normal copper (well v-power copper).

I don't bother with iridium anymore, with the amount of carbon deposits I get on my plugs the iridiums don't last me any longer anyway.

 

[jmv]

ooooh okay, so i need ZFR7F-11 for one stage colder??

 

[magnumP5]

ooooh okay, so i need ZFR7F-11 for one stage colder??

Yes, that would be it. I'm currently running the ZFR6F-11's with no apparent problem. I will know for sure once the weather gets hot as it hasn't been above 60 since I turbo'd.

 

[Kansei]

so you're even running the same exact plugs as me.. yeah I'm thinkin I might need to go to the 7 heat range, I don't think it has been above 30F since I turboed my car haha.

 

[magnumP5]

so you're even running the same exact plugs as me.. yeah I'm thinkin I might need to go to the 7 heat range, I don't think it has been above 30F since I turboed my car haha.

You think you're running too hot? I didn't think 7psi needed colder plugs. I guess I need to consult the spark plug replacement thread again (the one by TheMan)

 

[Kansei]

A lot of people say you don't need the 7 heat range until like 9psi, but who knows. I need to check on my plugs to make sure they are fine @ 6 heat range before I pay the $$ to get my MSP ECU flashed at the dealership (hopefully the dealership here will do it for me.. you know since I don't have an MSP or anything).

 

[magnumP5]

A lot of people say you don't need the 7 heat range until like 9psi, but who knows. I need to check on my plugs to make sure they are fine @ 6 heat range before I pay the $$ to get my MSP ECU flashed at the dealership (hopefully the dealership here will do it for me.. you know since I don't have an MSP or anything).

Yeah I personally have no clue if my ECU was flashed or not. I haven't been having any hesitation or (serious) fuel cut problems so I'm willing to be mine has been flashed. Oh well...

 

[Kansei]

Yeah I told myself the MSP ECU would just be a temporary solution, I'm still waiting to hear back about the DSM AFC beign used to correct the hesitation.. if it's possible, I won't bother giving Mazda money to flash my ECU. Sucks that I might have to sink money into what was only meant to be temporary haha. for now I just deal with it, it's not like I can get any traction on the ice/snow/slush streets here anyhow, flashed or not.