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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Dyno Day - Pt 2



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      12-17-2007, 07:11 AM   #1
Evil Diesel
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Dyno Day - Pt 2

Ian (Hotcoupe) and I returned to the scene of the crime today to stick the cars back on the rollers following the re-maps in our respective 335d's.

The results are plotted on the same graph - blue being today's shoot.

At first glance the results are disappointing and certainly in pure HP terms do not really bear out the difference to the car post re-map. Perhaps the increase in torque is the most startling with peak torque increasing to 490 ft. lbs from 445. The torque levels did lead to a bit of instability in the rollers!

Anyway - here it is.
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      12-17-2007, 07:34 AM   #2
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hmm, odd looking HP curve ?

did they get the Synchonisation right, ie. matching the engine speed to roller speed ?

I'm just surprised the peak power has moved so far down the Rev range.

It almost looks like you had wheelspin at 3700 rpm ?

It's very peaky, what's the drive like, must be a little tougher to control now :O

SJ
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      12-17-2007, 07:41 AM   #3
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Its still smooth.

The revs were calibrated twice.

The torque curve spikes up as he had to feed the power in to stop it jumping out of the rig.

Its entirely possible for a bit of wheelspin at 3700. I had the DTC light on putting my foot down at a ton on the M4 comming back! (kph obvoiusly )
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      12-17-2007, 07:45 AM   #4
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bloody hell
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      12-17-2007, 08:39 AM   #5
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Is that the remap that promises 350hp/700NM? Or some other map?
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      12-17-2007, 08:46 AM   #6
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      12-17-2007, 08:56 AM   #7
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Well yeah i was always suspect about the peak HP on those maps, but they might have recorded that on a dynojet or something, it's the Delta that's important, and for Torque it's there alright

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      12-17-2007, 09:08 AM   #8
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Quote:
Terza Is that the remap that promises 350hp/700NM?

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      12-17-2007, 09:17 AM   #9
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Quote:
Originally Posted by Terza View Post
Is that the remap that promises 350hp/700NM? Or some other map?
The very same.

To be fair though the gearbox protocols appear to have changed which prevented the box being reset from the previous 'learned' settings. I personally doubt it would make much difference.

The torque is right up there though and this is what makes the difference on the road.
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      12-17-2007, 09:34 AM   #10
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Ok - here is the graph of both 335d's. He took it a bit easier with Ian's building up the revs after mine nearly ended up in the next door workshop .......
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      12-17-2007, 10:08 AM   #11
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Who did the re-map guys ?
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      12-17-2007, 10:21 AM   #12
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Quote:
Originally Posted by mikem View Post
Who did the re-map guys ?

Mickey Mouse??

De Carlos gets 310 Std FFS
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      12-17-2007, 10:34 AM   #13
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A little harsh.

There is an extra 50 ft lbs of torque in there.
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      12-17-2007, 10:36 AM   #14
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What sort of gains can these guys expect from a 330D?
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      12-17-2007, 10:41 AM   #15
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Torque increase is immediately apparent from those graphs.

And even the BHP takes a significant leap - look at the power at 3,200 rpms:

Standard ~265
Updated ~290

Same old story - wether you like your power deivered frenetically (335i/M) or with a thundering velvet punch (335D).

I personally prefer the later for my dailly hack.

D.
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      12-17-2007, 10:43 AM   #16
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Quote:
Originally Posted by KK3960 View Post
What sort of gains can these guys expect from a 330D?
I heard maybe as much as 3 or 4 bhp!
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      12-17-2007, 10:48 AM   #17
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Where did you have it done Evil ? I'm tempted to bring my DMS up and give it a go .
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      12-17-2007, 10:55 AM   #18
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Quote:
Originally Posted by SiBurt View Post
I heard maybe as much as 3 or 4 bhp!
Sorry, I couldn't resist!

Check these guys out who did mine...

http://www.chippeduk.com/index.php
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      12-17-2007, 10:56 AM   #19
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Quote:
Scoot Where did you have it done Evil ? I'm tempted to bring my DMS up and give it a go .
Not Evil,but:

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      12-17-2007, 10:58 AM   #20
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Quote:
Originally Posted by SiBurt View Post
Sorry, I couldn't resist!

Check these guys out who did mine...

http://www.chippeduk.com/index.php
Are you going to post your dyno? It will be interesting to compare.
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      12-17-2007, 10:59 AM   #21
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Quote:
SiBurt Quote:
Originally Posted by SiBurt

Check these guys out who did mine...

http://www.chippeduk.com/index.php
I doubt there would be much difference,most mappers do the same thing after all.

Unless you have a plot that shows different Si?
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      12-17-2007, 11:11 AM   #22
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Quote:
Originally Posted by Hotcoupe View Post
I doubt there would be much difference,most mappers do the same thing after all.

Unless you have a plot that shows different Si?
I've not had it done guys. But I have to confess that I'm more than a little curious, based on this thread, to see what the actual figures are now!
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