Author Topic: Ethanol on M42? (Read 4928 times)

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

Bl0mgren · « **Reply #1 on:** June 09, 2011, 10:37:11 AM »

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

naika · « **Reply #2 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?

DesktopDave · « **Reply #3 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.

Bl0mgren · « **Reply #4 on:** June 12, 2011, 08:29:04 AM »

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

romkasponka · « **Reply #5 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.

naika · « **Reply #6 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

Bl0mgren · « **Reply #7 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