|
|
|
|
 |
 
|
 |
BMW Garage | BMW Meets | Register | Search | Today's Posts | Mark Forums Read |
 |
|
BMW 3-Series (E90 E92) Forum
>
How much power on stock spark plugs?
|
 |
| 07-28-2018, 02:22 PM | #1 |
|
Registered
0
Rep 2
Posts |
How much power on stock spark plugs?
Was curious how much people have made in stock plugs? Is there a heat range colder people are using? The car is question is making 425-450 rwhp
|
| 07-28-2018, 03:01 PM | #2 |
|
Private First Class
 65
Rep 175
Posts |
I'm running FBO with inlets E40 at 18psi on stock plugs. Using e85 has a similar effect to colder plugs. Although this up coming change I'm gonna test out one step colder ngk.
|
|
Appreciate
0
|
| 07-28-2018, 07:24 PM | #4 | |
|
Major General
 
1903
Rep 6,968
Posts
Drives: 2007 Black/Black 335i e90
Join Date: Apr 2011
Location: Holly, MI
|
Quote:
|
|
|
Appreciate
0
|
| 07-28-2018, 08:44 PM | #5 |
|
Lieutenant Colonel
 1932
Rep 1,532
Posts |
A rule of thumb is 1 step colder for every 100 hp. Not a bad idea to go a step colder when it's time to change 'em or other routine maintenance.
|
|
Appreciate
0
|
| 07-28-2018, 09:46 PM | #6 |
|
ahat
1034
Rep 2,592
Posts |
+1 and be prepared to change coils at least 60K once missfires start. As secondary resistance goes up (plug gap/age), the discharge from the coil will happen somewhere else and eventually become the path of least resistance. Not to mention what a leaky valve cover gasket can do by causing oil to accumulate at the plug base. That wont help ensure coil discharge is at the plug that's for sure.
__________________
 '13 335IS N54 (1 of 373 LeMans Blue out of 3597 total production e92)- Grey interior (1 of 24 in LMB with any trans- 1 of 14 with DCT)-MODS -MFactory LSD/MHD-BQ custom Tune/ATM-IC/AFE Momentum GT Intake/Konis/Mfront&HeimJoint Rear rods&arms/Brembos. https://photos.app.goo.gl/Lo6aHZRo7XqtPkhL8 |
|
Appreciate
0
|
| 07-31-2018, 02:08 PM | #7 |
|
First Lieutenant
 
88
Rep 325
Posts |
On FBO + tune, can you go with NGK 97506 2-Step Colder Spark Plugs? Do you need to swap out for new ignition coils too?
__________________
IG: @dyoos335i
|
|
Appreciate
0
|
| 07-31-2018, 06:42 PM | #8 | |
|
ahat
1034
Rep 2,592
Posts |
Quote:
60K miles? Yes, and do a VC gasket (if you got an n55 you might be a little more away from the critical mass zone). Any oil that can get in the chamber and plugwell (to a much lessor degree) will make max timing/boost/load more complicated. Keep it clean and dry and you can lean on it with less unpredictable issues. Everything I know about n54s tells me they are somewhat unique and when you start to lean on them in their later yrs there are not a lot of definitives. You just got to find what will make each one happy on the fuel you have access to and based on the specific combination
__________________
'13 335IS N54 (1 of 373 LeMans Blue out of 3597 total production e92)- Grey interior (1 of 24 in LMB with any trans- 1 of 14 with DCT)-MODS -MFactory LSD/MHD-BQ custom Tune/ATM-IC/AFE Momentum GT Intake/Konis/Mfront&HeimJoint Rear rods&arms/Brembos. https://photos.app.goo.gl/Lo6aHZRo7XqtPkhL8 |
|
|
Appreciate
0
|
| 07-31-2018, 07:50 PM | #9 | |
|
First Lieutenant
88
Rep 325
Posts |
Quote:
__________________
IG: @dyoos335i
|
|
|
Appreciate
0
|
| 08-01-2018, 07:46 AM | #10 |
|
ahat
1034
Rep 2,592
Posts |
Id bite the bullet.
__________________
'13 335IS N54 (1 of 373 LeMans Blue out of 3597 total production e92)- Grey interior (1 of 24 in LMB with any trans- 1 of 14 with DCT)-MODS -MFactory LSD/MHD-BQ custom Tune/ATM-IC/AFE Momentum GT Intake/Konis/Mfront&HeimJoint Rear rods&arms/Brembos. https://photos.app.goo.gl/Lo6aHZRo7XqtPkhL8 |
|
Appreciate
0
|
| 08-01-2018, 10:29 PM | #11 | |
|
First Lieutenant
88
Rep 325
Posts |
Quote:
__________________
IG: @dyoos335i
|
|
|
Appreciate
0
|
 |
| Bookmarks |
| Thread Tools | Search this Thread |
|
|
