Can I get some BMW 3 series advice?

The small turbo on the 535d is slightly smaller than the 530d but produces less boost. The 0-62 sprint times are marginal at best (.4 of a sec).

The sequential turbocharging on the x35ds has absolutely no relevance to the low down pull of the car, more peak power and in gear acceleration. Otherwise we'd be arguing that they did it to the petrol for the same reasons, which, they haven't.
 
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Here's the rolling road graph from the remap session, take the numbers with a pinch of salt, I'm sure it's not really at 275bhp ;) Probably more 250-260.

330dremap.jpg


The original torque curve is pretty smooth when on boost but does trail off after 3.5k but you can take it up to 4k. So a usable range from 2,250 to around 4,000.

The remap has really boosted the mid-range, but the limitations on the stock injectors and turbo means the high end isn't as impressive. You get a massive ramp up to 2,500 and then it's all kinda over by 3,500/3,750. You can see a flat spot where peak torque should be, my clutch was slipping when it was remapped but has been replaced now.

Check out the bhp figure for 1,500 rpm, yep that's about 50bhp and just 180lb/ft, you really want to keep the car at 2,250+ for spirited driving and then shifting around 3,500/3,750.
 
DanF said:
Check out the bhp figure for 1,500 rpm, yep that's about 50bhp and just 180lb/ft, you really want to keep the car at 2,250+ for spirited driving and then shifting around 3,500/3,750.
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Wheel torque, I'd be changing gear at 4,000rpm.
 
merlin said:
lb/ft or nm?
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lb/ft, but I did say with a pinch of salt, the DMS remap company claim their maps take the 204bhp engine out to 260bhp and 410lb/ft and I'd imagine that they are being a little conservative.

Anyway I have no delusions that my car is some super car crushing monster, the graph was more to just show the difference between the runs and also to show the rough profile. The real world difference the remap makes it night and day over the stock car. The remaps have been tested by 2 reputable places now to drop 0-60 from 7~ to 6~ seconds which isn't bad considering that's still using 3rd gear. This is why they accelerate really fast from 70-80mph in top gear on the motorway :p

http://www.evo.co.uk/carreviews/evocarreviews/53053/bmw_3series.html
 
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[TW]Fox;14474057 said:
It is an ED car I am sure of it. Pretty sure the production start for ED is November 2007?
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I think you might be right actually. I've seen a couple of fanzine sites that seem to say ED started on the 3 series for MY08.
Does your car have the optimum shift indicator Merlin as that must be an easy way to tell?
 
Dandle said:
I think you might be right actually. I've seen a couple of fanzine sites that seem to say ED started on the 3 series for MY08.
Does your car have the optimum shift indicator Merlin as that must be an easy way to tell?
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Yes it does.

And brutal braking power too, I think that's a sign of brake regen?
 
[TW]Fox;14473026 said:
The turbo on the 530d is larger than the smaller turbo on the 535d is it not, therefore takes longer to spin up. Whatever, you dont get loads of go at 1400rpm! You still get performance - this is not what the point being made is - its just not quite as flexible at lower revs as the petrol variant. It's miles better than, say, a 2 litre Focus or something though.
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...except it's variable vane on the 330/530d (and not on the 335/535d).

Time to put this to bed, please post a dynograph of your 530i - this is one of my 330d:

after.jpg


Seems to be pulling pretty well from low down to me?
 
Actually I found one - this is of a Z4 3.0 just to be fair as your 530i isn't remapped:

Z4.jpg


Looks like the 330d picks up better from low revs.

As I've said before, your test subject 530d is broken.
 
merlin said:
Yes it does.

And brutal braking power too, I think that's a sign of brake regen?
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I don't think it is, they are just the normal brakes. Copied from the BMW website "Brake Energy Regeneration
Brake and now you'll no longer just slow yourself down; you'll be helping to keep your car moving. Whenever you apply the brakes, or take your foot off the accelerator and coast, the normally wasted energy is recycled. Brake Energy Regeneration uses this energy to recharge the battery, reducing the demand on your engine, the fuel you consume and CO2 emissions."
 
NickXX said:
Actually I found one - this is of a Z4 3.0 just to be fair as your 530i isn't remapped:

Z4.jpg


Looks like the 330d picks up better from low revs.

As I've said before, your test subject 530d is broken.
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The Z4's power delivery is linear, the 330d's comes in at once in a big lump then tails off..

The 530d we've owned since 19k miles. It is not broken. If it is, then the 325d and the 530d E90 and E60 were also broken as they were exactly the same to drive.

Your 330d has gone, let go and embrace petrol ;)
 
I'd be more concerned about the random torque fluctuations of the Z4. Bizzare.

And no, looking at the graph for the 330d, there isn't just one "dollop" of power/torque. It holds above 375NM for well over 66% of its rev range!

Why not embrace both fuel types for what they are good at.
 
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