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

DISCUSSION => Engine management => Topic started by: naika on June 09, 2011, 10:28:17 AM

Title: Ethanol on M42?
Post by: naika on June 09, 2011, 10:28:17 AM

HI Guys
I just bought a Touring 318i swapped with an M42 in France, and I'm considering the Ethanol conversion as it is about half the price of regular gas over here.

Has anyone done this?
I assume I need a chip to modify ignition timing and injector timing as well, but do I absolutely need to change injectors to make up for the additional flow, or increase the pressure in the injecto ramp?

Any info would be useful

Thanks

(http://i209.photobucket.com/albums/bb173/franckleprodhomme/Touring%20M42/dsc00911.jpg)

(http://i209.photobucket.com/albums/bb173/franckleprodhomme/Touring%20M42/dsc00910.jpg)

(http://i209.photobucket.com/albums/bb173/franckleprodhomme/Touring%20M42/dsc00415.jpg)

(http://i209.photobucket.com/albums/bb173/franckleprodhomme/Touring%20M42/dsc00414.jpg)

Title: Ethanol on M42?
Post by: Bl0mgren on June 09, 2011, 10:37:11 AM

Running e85 on stock injectors with higher fuel pressure. (because inspection)
would recommend bigger injectors..

Title: Ethanol on M42?
Post by: naika on June 10, 2011, 08:16:10 AM

So, I would need to instal something like 240-250cc injectors and a new map for the ECU?

Title: Ethanol on M42?
Post by: DesktopDave on June 10, 2011, 11:36:35 AM

I have no idea about the alcohol (though I'd get that chip to advance timing aggressively).

I just wanted to say that I love those touring wagons.  One of these days I'll be heading over & shipping one back.  US DOT has a 25 year exemption that I'm planning on taking advantage of.

Title: Ethanol on M42?
Post by: Bl0mgren on June 12, 2011, 08:29:04 AM

You need 30-40% more fuel when running on e85.
Car will work without new map :)

Title: Ethanol on M42?
Post by: romkasponka on June 13, 2011, 08:08:40 AM

Imho best way is to buy bigger injectors from turbo car (SAAB 4 cil turbo engine, as I remember they are about 350cc and same size, or audi 5 cil turbo 300cc). Fine tuning could be done with fuel pressure.

Title: Ethanol on M42?
Post by: naika on June 14, 2011, 03:16:33 AM

Thanks Guys for your input

If I'm not mistaken, the 318is injectors are around 200cc, correct?
So if I would need to get 270-280cc injectors.

Being in France, I'll have to check what cars have those type of injectors.

@Bl0mgren: Can you please elaborate on the fact that I don't need a new mapping? I thought I'd need to modify the ignition a bit

Title: Ethanol on M42?
Post by: Bl0mgren on June 19, 2011, 09:12:44 AM

Quote from: naika;104561

Thanks Guys for your input

If I'm not mistaken, the 318is injectors are around 200cc, correct?
So if I would need to get 270-280cc injectors.

Being in France, I'll have to check what cars have those type of injectors.

@Bl0mgren: Can you please elaborate on the fact that I don't need a new mapping? I thought I'd need to modify the ignition a bit

Car will start and you can drive it. If you want engine to run fine and gain hp with good fuel consumption you should consider a remapp of course :)