E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 03-21-2009, 01:45 PM   #1
beemteam1001
Registered User
 
Join Date: Aug 2008
Location: catonsville, MD
Posts: 271
My Ride: E46 323i
performance ignition coils

has anybody installed ignition coils? If so, did you feel any gain in power or throttle responce?

thanks,
matt
__________________
e46 323i K&N CAI, AA Cat Back, Crank Pully, stage II chip, eBay headers[/SIZE]
beemteam1001 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 03-22-2009, 11:15 PM   #2
beemteam1001
Registered User
 
Join Date: Aug 2008
Location: catonsville, MD
Posts: 271
My Ride: E46 323i
no one
__________________
e46 323i K&N CAI, AA Cat Back, Crank Pully, stage II chip, eBay headers[/SIZE]
beemteam1001 is offline   Reply With Quote
Old 03-23-2009, 02:14 AM   #3
paraklas
Registered User
 
Join Date: Jan 2006
Location: Cyprus
Posts: 5,890
My Ride: ESS TS2 320ci
Search a bit, it's been tried. No gains at all, stick with OEM
__________________
http://www.argyrides.eu/makeyourownsig.jpg
paraklas is online now   Reply With Quote
Old 03-23-2009, 08:47 PM   #4
ari00
Registered User
 
Join Date: Sep 2002
Location: MA
Posts: 962
My Ride: 04 330ci
None at all, and as a matter of fact, they failed on me in less than 35k miles. I only bought them because they were on sale and comparable in price to stock...not for any performance gain. You won't feel a thing.
ari00 is offline   Reply With Quote
Old 04-02-2009, 04:06 AM   #5
mkodama
Registered User
 
mkodama's Avatar
 
Join Date: Oct 2006
Posts: 33,167
DON'T get performance ignition coils! Do NOT!!! Especially if they are from BAVauto. I think every single person I've heard who bought these has problems or lost performance due to poor quality.

OEM are close to flawless. The 2002+ ignition coils I would say are flawless, because they never fail, can provide consistent sparks way beyond the RPM range of our engines, are super compact, don't get hot, and best of all are cheap, even from the dealer. The earlier coils are more expensive and had a recall for a few specific production months, but also have not a single problem with them.

Spend modding money elsewhere.
__________________

mkodama is offline   Reply With Quote
Old 04-05-2009, 12:16 AM   #6
F1004fun
Registered User
 
Join Date: Mar 2008
Location: Northern CA
Posts: 172
My Ride: '02 330Ci
I have been working on using a 16V 5.5A step-up box tied into the power supply for the ignition coils. I have upgraded mine to the newer style Bosch "pencil style" coils, these are not the horrible ones that have been failing those were Bremi. But apparently power can be made by upping the voltage to the coils, widening the spark plug gap to .040"-.050" and actually retarding the timing a couple of degrees. The voltage step-up box can be found on Speedway motors website.
http://www.speedwaymotors.com/175-VO...-MSD,3844.html
I still have to check the actual amperage draw of the ignition circuit so I don't know if this will work yet. But I will make a post after I get a working setup going.
F1004fun is offline   Reply With Quote
Old 04-05-2009, 12:20 AM   #7
Dreamliner330
Registered User
 
Join Date: Jun 2008
Location: Minnesota
Posts: 2,843
My Ride: 330xi
man...i just wish i could spark bigger man....gots to have me sum betta coils


























Dreamliner330 is offline   Reply With Quote
Old 04-05-2009, 07:01 AM   #8
PEI330Ci
58mm of Bliss
 
PEI330Ci's Avatar
 
Join Date: Jul 2003
Location: PEI,Canada
Posts: 3,935
My Ride: 330i, 330Ci
Quote:
Originally Posted by F1004fun View Post
I have been working on using a 16V 5.5A step-up box tied into the power supply for the ignition coils. I have upgraded mine to the newer style Bosch "pencil style" coils, these are not the horrible ones that have been failing those were Bremi. But apparently power can be made by upping the voltage to the coils, widening the spark plug gap to .040"-.050" and actually retarding the timing a couple of degrees. The voltage step-up box can be found on Speedway motors website.
http://www.speedwaymotors.com/175-VO...-MSD,3844.html
I still have to check the actual amperage draw of the ignition circuit so I don't know if this will work yet. But I will make a post after I get a working setup going.
FYI, I'm running 2 steps colder plugs with them gapped at 0.045 on stock coils. No problems.

Probably the biggest issue with manipulating the coil signals is that the DME monitors this signal and uses it to help determine misfires. It is part of the logic function that helps advance timing to the limits of the fuel being used. Sticking aftermarket coils, or other devices in the signal chain is like building a brick wall for the DME to operate behind. The World Challenge guys seek 1 hp gains at costs most of us couldn't stomach, yet they run OEM coils on both the M54 and N52 engines. The big difference there though, is that they drive the coils with a Motec CDI8. (And M600 or M880 Stand alone)

The Moristech Piggyback that I'm using does not sit between the ignition coils and the DME, but manipulates the crank position sensor signal to vary timing.

Sounds like an interesting project, but as I'm sure you know, it's very difficult to prove 1 or 2 hp gains with a chassis dyno. Hopefully a before and after dyno will show better gains than that to reward your work.

Best of luck!
PEI330Ci is offline   Reply With Quote
Old 04-12-2009, 12:08 AM   #9
F1004fun
Registered User
 
Join Date: Mar 2008
Location: Northern CA
Posts: 172
My Ride: '02 330Ci
I have measured a lot of different spark plugs and found that the NGK BKR6EK have the lowest internal resistance of about 1.7k ohms, most of the other plugs I checked measure 5k-5.5k ohms. I run a BKR6EK with a gap of about .060", by opening up the gap you effectively raise the arc-over voltage, from there a lower resistance plugs allows for more amperage flow, but for a shorter duration. So to increase the spark duration at a given amperage flow and arc-over voltage you need to increase coil saturation, and to do that with only a well designed stock coil at your disposal you need to increase the voltage to them.
I see cars come into the shop a lot with whacked out alternators running at a pegged 16+ volts, and they run just fine. So I am just going to splice into the power supply to the coils and increase the voltage to a steady 16.5 volts.
As far as the DME sensor wire, it uses this to change to dwell time to the coils and for misfire detection, it uses the knock sensors for timing advance. This wire doesn't get messed with anyway it's on the ground side of the secondary windings of the coils. You can tweak the signal a little if you want. but that is another subject.
F1004fun is offline   Reply With Quote
Old 04-13-2009, 01:24 PM   #10
joejo9795
Registered User
 
Join Date: Jun 2003
Location: Thailand
Posts: 103
My Ride: 323IA E46
Try Splitfire Ignition Coils. It increases more power in FI. I do not know the feedback from NA.
joejo9795 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Censor is OFF





All times are GMT -5. The time now is 03:11 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use