People running the PR ignition set

langsbr

Captain
Apr 5, 2017
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07 335i 6MT e90
This forum and community are great. I've never heard of carbon tracking before. Glad to learn something new. I take it this is something only prevalent with improved ignition systems and not generally common in oem situations?
 

Bmwfixerguy1

Lieutenant
Jun 5, 2017
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07 335i MT
This forum and community are great. I've never heard of carbon tracking before. Glad to learn something new. I take it this is something only prevalent with improved ignition systems and not generally common in oem situations?

No its can happened anywhere there is a spark gap to be jumped.. I'd have to say in my experience it is not as common with COP set ups though
 

zmon1300

Corporal
Nov 3, 2016
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Chicagoland
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'10 335xi
Yeah, I had the same issue. Was gapped at .025 and was getting a slight misfire soon as I went into full boost ( pure stg 2 HiFlow ). Re-gapped to .022 and been solid since! Glad you got it figured out :D
 

Jeffman

Major
Jan 7, 2017
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Everybody above getting misfires...on what fuel were you getting misfires? E85? E60? Race Fuel? 93oct? 91ACN?
 

camberadam

Sergeant
Feb 15, 2017
257
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Baltimore
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Tasmin Green e92
97506 w/ dielectric @ 0.22 [e60+]... No issues so far; will keep an eye out though. Thanks for bringing this up, I've never heard of "carbon tracking" either.
 
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tekkies2

Lurker
Jan 29, 2017
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chicago il
www.tekks.net
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z4 35i (bullet)
my working great gap .22 no misfire running 26psi on big twins. just pulled plugs after 8000 miles they look like new, these coils are awesome. but got to make sure there push all way in. run ngk 1 step cooler plug
 

JAperformance

Specialist
Feb 13, 2017
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09 335i
So it seems that .022 gap it's the sweet spot for NGK 97506 and .025 with 95770 on PR coils which it's what I've been running with no issues.
 
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V8bait

Lieutenant
Nov 2, 2016
500
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Texas
So most on here couldnt get a decent gap increase even with these coils ?

The coils make 44kV thereabouts, around 10kV more than factory. They make nearly 4x the energy though, which means if they span the gap they will fire hot with good duration. Calculate the gap of OEM and PR yourself at the bottom of this link. Add about 40kpa to whatever you calculate and remember you need a little buffer between max just in case. http://www.megamanual.com/seq/coils.htm
 
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SlowE93

Major
Jul 2, 2017
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Just a plane ticket away !
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The coils make 44kV thereabouts, around 10kV more than factory. They make nearly 4x the energy though, which means if they span the gap they will fire hot with good duration. Calculate the gap of OEM and PR yourself at the bottom of this link. Add about 40kpa to whatever you calculate and remember you need a little buffer between max just in case. http://www.megamanual.com/seq/coils.htm
Any personal preference on the Audi coils vs these ? Also, why would you choose one over the other. Thanks in advance as Im looking to make a purchase but on the fence of which route to take.
 

doublespaces

Administrator
Oct 18, 2016
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2009 E93 335i
Any personal preference on the Audi coils vs these ? Also, why would you choose one over the other. Thanks in advance as Im looking to make a purchase but on the fence of which route to take.
He designed the PR coils
 
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