Question: 320d ED versus 320d (engine content)

[CraigyMc]

Hello chaps,
Is there any mechanical difference between the 163ps 320d EfficientDynamics motor and the 184ps "regular" 320d one?

I believe they are both called the "N47D20" in BMW speak, but I'm not sure if they differ in some way (eg. smaller turbo on the lower power one).

It'd be useful to know the answer to this if, for example, someone wanted to map the ED motor to the same power as the "normal" one.

I know the flywheel on the ED is different than the regular car so that would be a risk.

C

Edited by CraigyMc on Saturday 22 December 16:16

[Stevie750iL]

I've just bought an E91 with the M47 engine (Non ED) I had mine remapped by a Local Superchips dealer. I am more than happy with results.

http://en.wikipedia.org/wiki/BMW_3_Series_(E90)

[CraigyMc]

Stevie750iL said:

I've just bought an E91 with the M47 engine (Non ED) I had mine remapped by a Local Superchips dealer. I am more than happy with results.

http://en.wikipedia.org/wiki/BMW_3_Series_(E90)

Thanks for that but it's not really what I was asking about.

The F30 (and post-LCI E90s) all seem to use the same N47D20 engine, whether 316d,318d,320d EfficientDynamics, or 320d.

My question is basically this: Why wouldn't someone buy (say) a 316d, 318d or 320d/ED and have it remapped to behave like a 320d or more?

If they are all the same, then the 114bhp 316d engine could be remapped up to about 200-210bhp, just as a 320d model equipped with the same engine might.

That's where my question "are they mechanically the same?" came from.

C

Edited by CraigyMc on Saturday 22 December 16:18

[philmots]

Does the code not refer to the block and maybe the head?

Which could then have different sized turbos, injectors etc attached to make different power levels.

[Stevie750iL]

Looks like they all have same basic mechanical bore/ stroke dimensions.

http://www.bmwheaven.com/database/engine.php?type=...

So my guess is different turbo pressures/ ECU's. According to RealOem they all run different turbos. Possibily different injectors. Have a browse through Real Oem.

So in answer to your question? I don't think a N47 with 143 could be remapped to 200+ bhp without the appropriate ECU/ turbo combination. But I aint no expert.

According to Superchips website their remap from the 116d through to 320d, all with 1995cc displacement, average 40+ bhp gains. All with the N47 engine.

Thinking about BMW development costs, they are all probably the same mechanically. Why would BMW develop a mechanically different range of N47 engines? Just tune with turbo and ECU? Much more cost effective.

[va1o]

I think the 16d has swapped over from a 2.0 to 1.6 recently in some models, but pretty sure the others are still the same basic 2.0 unit. Its a little old now at 5-years but the figures are class leading.

[CraigyMc]

va1o said:

I think the 16d has swapped over from a 2.0 to 1.6 recently in some models, but pretty sure the others are still the same basic 2.0 unit. Its a little old now at 5-years but the figures are class leading.

The only 1.6 I can think of isn't diesel. The 320i ED is actually a 1.6 turbo, but the 320i (non ED) is a 2.0 turbo.

The 316d, 318d, 320d, and 320d ED are all 2.0 turbos.

C

[va1o]

The 1.6 diesel is new this year, engine code is N47D16 if you want to look it up

Didn't know the 320i ED was a 1.6 petrol, same engine as the 316i I guess? BMWs range is confusing

[CraigyMc]

va1o said:

The 1.6 diesel is new this year, engine code is N47D16 if you want to look it up

I did look this up - the 316d shows up on both BMW.com and BMW.co.uk as a 2.0 (well, 1995cc actually).
It also shows up as a 1995cc engine on realOEM, with a build date of 10.2012.
Might be out of date info on their sites. N47D16 would point at a 1.6 version of the N47 right enough.

ETA: Just checked, the N47 1.6 diesel is in the 1er (114d, 116d ED) but not the 3er..yet.

va1o said:

Didn't know the 320i ED was a 1.6 petrol, same engine as the 316i I guess? BMWs range is confusing

The bore and stroke are the same, but the ED makes 170ps and the 316i makes 136ps.
It's probably the same basic mechanical setup, but a similar question abut the turbo and/or boost levels as I posited above.

For the 316i vs. 320i ED, I've checked using Stevie750i's realOEM site and the turbocharger part numbers are identical (Part# 11627645758).

For the 320d vs. 320d ED, I've checked using Stevie750i's realOEM site and the turbocharger part numbers are identical (Part# 11658519476).
Interestingly, the 316d and 318d DO use a different turbo from the 320d cars, but they are the same part for the 316d and 318d: Part# 11658518205.

So, there are likely other bits to worry about that I haven't considered (cooling requirements, etc), but at 10,000ft it doesn't seem like the engine in the 320d/ED would have a problem with a remap as if it were a straight 320d.

The 316i engine equally looks like it could handle a remap to at least 320i/ED state.

C

Edited by CraigyMc on Sunday 23 December 10:44

[Zwolf]

I expect there may be differences in the ancillaries, particularly the cooling system.

Part of the additional cost of the BMW Performance upgrade to the 2.0D engine of the last couple of years are an upgraded radiator, fan and gearbox oil cooler if it's an automatic.

Extra power rarely comes free of an associated cost somewhere else, in this case you may well just end up turning a 320ED into a 320D and dropping your economy to match, as well as potentially increasing workload on other parts of the vehicle that weren't engineered to that spec originally by BMW.

Simpler to just buy the 320D/ALPINA D3 in the first place I'd have thought if performance were the priority over parsimony.

[CraigyMc]

Zwolf said:

I expect there may be differences in the ancillaries, particularly the cooling system.

Part of the additional cost of the BMW Performance upgrade to the 2.0D engine of the last couple of years are an upgraded radiator, fan and gearbox oil cooler if it's an automatic.

Extra power rarely comes free of an associated cost somewhere else, in this case you may well just end up turning a 320ED into a 320D and dropping your economy to match, as well as potentially increasing workload on other parts of the vehicle that weren't engineered to that spec originally by BMW.

Simpler to just buy the 320D/ALPINA D3 in the first place I'd have thought if performance were the priority over parsimony.

Buying a 320D/D3 wouldn't give the following:

lower ride height
low drag wheels
longer final drive
centrifugal clutch

I want my cake and i want to eat it.

C

[Chr1sch]

I did 20000 miles in a 2011 320Ed and what I can say is there is bugger all in it on the road between that and a normal 320d - bar the ed rides better but is quite soft on big balloon tyres

They also have the same torque figure at the same rpm so I had always assumed they were just 'detuned'

[CraigyMc]

Chr1sch said:

I did 20000 miles in a 2011 320Ed and what I can say is there is bugger all in it on the road between that and a normal 320d - bar the ed rides better but is quite soft on big balloon tyres

They also have the same torque figure at the same rpm so I had always assumed they were just 'detuned'

For clarity, I drive an E90 ED, and am halfway through ordering another (an F30). The question is relevant to me because I'm planning to buy the F30 outright at the end of the company car lease (my company permits employees to purchase their company cars).

C

[LKz123]

CraigyMc said:

Hello chaps,
Is there any mechanical difference between the 163ps 320d EfficientDynamics motor and the 184ps "regular" 320d one?

I believe they are both called the "N47D20" in BMW speak, but I'm not sure if they differ in some way (eg. smaller turbo on the lower power one).

It'd be useful to know the answer to this if, for example, someone wanted to map the ED motor to the same power as the "normal" one.

I know the flywheel on the ED is different than the regular car so that would be a risk.

C

Edited by CraigyMc on Saturday 22 December 16:16