In this video I show you how I converted my BMW N54 to run on Audi R8 Ignition coils using my own home made circuit board.
Audi ignition coils are "Smart" coils and BMW ignition coils are "Dumb" coils. A smart coil has the driver built into the coil and a dumb coil needs to be driven by an external sources such as your ECU or DME. The advantage of a smart coil is you can power it right from your battery which allows for you to run more dwell before it becomes saturated.
An N54 can support more power and you can run more spark plug gap with Audi coils.
I do this on my 2008 E90 BMW 335i.
Parts List (affiliate):
Coils
amzn.to/39qpTk9
10K Ohm Resistors
amzn.to/2UskhBL
Transistor
amzn.to/3bEsuc0
Prototype Board
amzn.to/3awirpc
Heat Shrink
amzn.to/2vZehHd
Voltage Regulator
amzn.to/2UrXTZk
Audi Coil Connectors
amzn.to/2xCP2Lc
Cable Loom
amzn.to/39BleME
amzn.to/2WSkwYx
Male Spade Connectors To Stock BMW Harness
amzn.to/2xwySDf
For anyone wondering I couldn't find the male plastic BMW ignition connectors.
This was possible due to the fact that running an N54 on Audi coils is supported in MHD. There is a ready made kit available from a merchant called Bimmer Life Tuning. I am not affiliated with them and I pieced this together myself. If you like the concept of driving your coils external of your ECU but don't want to do all the work show in this video you could consider their product.
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Thanks for watching :) When you see the word "affiliate" listed beside any link in my description please know that this is a custom link and I will earn a small commission if you opt to purchase using said link. This is at no extra cost to you so it's a win all around :) Thank you!
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