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      03-13-2017, 03:47 PM   #23
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Pls confirm:

12120039664 = Ngk 97506 2 steps colder
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      03-13-2017, 11:30 PM   #24
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Quote:
Originally Posted by allmotor_2000 View Post
What part # NGK and did the misfires go away?
NGK 97506 and yes car runs perfect now
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      03-15-2017, 02:12 AM   #25
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Awsome thanks
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      03-15-2017, 04:24 PM   #26
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what is BMW's recommended service interval for the plugs? Mine is 28000km and have never changed it
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      03-15-2017, 07:59 PM   #27
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Originally Posted by bleunetizen View Post
what is BMW's recommended service interval for the plugs? Mine is 28000km and have never changed it
If you do 2 steps you will need to start doing them every 10-15k miles
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      03-16-2017, 03:24 AM   #28
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thanks is it to run higher boost? what is the interval for stock car?
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      03-18-2017, 12:06 AM   #29
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Quote:
Originally Posted by Six Pot View Post
Just did this today after developing misfires post intake/tune, super easy. Went with a 2-step colder NGK @ .020" gap.
What intake and tune?
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      03-18-2017, 03:41 PM   #30
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Originally Posted by Advantage View Post
What intake and tune?
JB4 w/ BCM , BMS Intakes
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      03-18-2017, 03:46 PM   #31
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Quote:
Originally Posted by bleunetizen View Post
thanks is it to run higher boost? what is the interval for stock car?
Yes stock plugs and gapping seems to get finicky when you increase the boost. JB4 stage 1 ran fine. Full JB4, bcm, intakes @ 18psi equaled misfires. Now running 21 psi , so far it's been a beast but I can tell I will need meth or keep mixing e85 as trims are near max. Stock interval is ~20k
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      04-06-2017, 01:24 PM   #32
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Quote:
Originally Posted by Six Pot View Post
Yes stock plugs and gapping seems to get finicky when you increase the boost. JB4 stage 1 ran fine. Full JB4, bcm, intakes @ 18psi equaled misfires. Now running 21 psi , so far it's been a beast but I can tell I will need meth or keep mixing e85 as trims are near max. Stock interval is ~20k
You do realize adding E85 doesn't help your trims. Ethanol requires significantly (like 30%) more fuel volume for the same stoich ratio.
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      04-12-2017, 07:11 PM   #33
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Quote:
Originally Posted by allmotor_2000 View Post
You do realize adding E85 doesn't help your trims. Ethanol requires significantly (like 30%) more fuel volume for the same stoich ratio.
Yeah, thinking BM3 to change the fueling to achieve this. But you are the guru here, I actually have many questions for you especially around meth and the theory of potential failure of the rear cylinders. Mind if I PM you?
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