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      07-14-2019, 09:13 PM   #1
Jkurahara
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Bootmod3 and spark plugs

I seem to have fouled a plug at a track event today, having issues with cyl 3 misfiring. Started off really shutting and thrower a soft code. Over time got way better and no more codes but can feel some shuddering.

Iím just running stage1 93 with 94 oct gas and upgraded charge pipes intercooler and downpipe.

What plugs are recommended and what are they recommended being gapped to?
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      07-14-2019, 09:45 PM   #2
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Would recommend running a 91 tune or stock for track days
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      07-14-2019, 11:10 PM   #3
Jkurahara
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Quote:
Originally Posted by magha View Post
Would recommend running a 91 tune or stock for track days
Might do that from now on before getting a custom tune, Iíve logged a 93 stage 1 a few times and havenít seen any knock but I suppose better safe than sorry. I donít think that would have caused the plugs to foul though?

Any recommendations on plugs and spacing?
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      07-15-2019, 04:04 AM   #4
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OEM Bz spec N2x NGK plugs gapped at 0.5mm/0.020"
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      07-15-2019, 09:57 AM   #5
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Quote:
Originally Posted by Bee Pee View Post
OEM Bz spec N2x NGK plugs gapped at 0.5mm/0.020"
From the n20? 97506 ngl plugs?
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      07-15-2019, 10:01 AM   #6
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Quote:
Originally Posted by Jkurahara View Post
Quote:
Originally Posted by Bee Pee View Post
OEM Bz spec N2x NGK plugs gapped at 0.5mm/0.020"
From the n20? 97506 ngl plugs?
I believe so.

I'm running NGK SILZKBR8D8S spark plugs BMW oem part no 12120039664.
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      07-17-2019, 07:31 PM   #7
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Quote:
Originally Posted by Bee Pee View Post
I believe so.

I'm running NGK SILZKBR8D8S spark plugs BMW oem part no 12120039664.
Went with exactly that, worked like a charm gapped to .2 no more misfire, sheís back to pulling hard and running smooth
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      07-22-2019, 01:04 PM   #8
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Quote:
Originally Posted by Jkurahara View Post
I seem to have fouled a plug at a track event today, having issues with cyl 3 misfiring. Started off really shutting and thrower a soft code. Over time got way better and no more codes but can feel some shuddering.

Iím just running stage1 93 with 94 oct gas and upgraded charge pipes intercooler and downpipe.

What plugs are recommended and what are they recommended being gapped to?
I recommend NGK colder plugs but they are currently on back order. Check with PTF on what other plugs they recommend
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      12-02-2019, 04:34 PM   #9
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Quote:
Originally Posted by Bee Pee View Post
I believe so.

I'm running NGK SILZKBR8D8S spark plugs BMW oem part no 12120039664.
Hi BeePee,

Re these plugs, please can you let me know if you got them from BMW under their part number? If so, did them come gaped correctly (with the gap Bootmod3 suggest) or did you have to alter the gap yourself?

My car is in for a service tomorrow and I pretty sure the plugs are due, so will ask them to put in a step colder if possible. Not sure if they will go for it, but worth asking.

Cheers.
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      12-03-2019, 02:10 AM   #10
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Quote:
Originally Posted by widetyres View Post
Quote:
Originally Posted by Bee Pee View Post
I believe so.

I'm running NGK SILZKBR8D8S spark plugs BMW oem part no 12120039664.
Hi BeePee,

Re these plugs, please can you let me know if you got them from BMW under their part number? If so, did them come gaped correctly (with the gap Bootmod3 suggest) or did you have to alter the gap yourself?

My car is in for a service tomorrow and I pretty sure the plugs are due, so will ask them to put in a step colder if possible. Not sure if they will go for it, but worth asking.

Cheers.
WT,

I bought them from BMW parts dept and had to change gaps to what I wanted

BP
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      12-03-2019, 08:52 AM   #11
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ALWAYS check gap prior to installation. For those looking for the NGK 97506, the cheapest I've found them (and where I ordered mine from) was Rock Auto. They're between 12 and 13 dollars each there.
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