M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Electrical => Topic started by: CJackson on June 16, 2016, 12:58:13 AM

Title: M42 conversion
Post by: CJackson on June 16, 2016, 12:58:13 AM

Hi there,

Im planning to convert my e30 Coupe 318i (M40) to an m42 engine. I currently have most of the ancillaries required Inc M42 motor, E30 M42 Engine harness etc. However I only have an E36 M42 Coil pack.

Is it possible to run this engine with this loom on the E36 coil pack, and If so how would I go about connecting it to the loom as the E36 Coil pack has 5 pins whereas the E30 Coil pack has 5 separate leads?
Kind Regards,


Cooper

Title: Re: M42 conversion
Post by: Darky on June 16, 2016, 02:25:33 AM

Short answer is yes.
Most people go coil on plug though.

The e30 m42 harness has 4 connectors and 4 Leeds
The e36 m42 coil pack has 1 connector and 4 Leeds

You just have to google m42 coil on plug conversion for the 2 different wiring harness, and do a bit of reverse engineering.

Which inlet manifold and Dme are u using?

Cheers Rohan

Title: Re: M42 conversion
Post by: CJackson on June 17, 2016, 01:44:19 AM

Ahh okay will do, thanks!

I have the e30 ECU and the e36 Manifold, just bypassing and disregarding the existence of the DISA valve. Engine thankfully does not have EWS.

Why do you ask?

Title: Re: M42 conversion
Post by: Darky on June 22, 2016, 01:49:06 AM

For that you will probably need either a e30 inlet manifold or e36 Ecuador.
They need to match because the air flow and then fuel need to match.
It will still work but just not quite perfectly.