[Boz335i]

Just loaded the new firmware update at lunchtime.

First off tried the map 8 (turbos off!), comes up with a CEL, but I'd expect that.
Now this felt really strange, it just felt slow. Would this be the same as 325i or 330i? Now I know these cars aren't slow, but in comparison they do feel it.

Another thing, I'm sure there's an explanation for this, but my perf Exhaust got louder, really loud, not in a bad way, but people started looking at me

Pulled over to clear the CEL and changed to map 1, bloody hell it was pulling hard. Same with map 5, it felt much stronger. First thing I thought was, is this safe? Didn't want to risk map 2.
Set my max boost to 15 now just in case.

Conclusion: I didn't think I would notice any difference, but it appears to be a fair bit sharper.

[idnan]

I've actually noticed the same with the latest firmware. I've got DPs, FMIC amongst other things and map 1 feels as quick as map 2 on the old firmware.

Map 8 is just slow, feels more like a 320i in my opinion. I'm pretty sure the 330i is quicker as it is designed to make its power all up at the top end of the rev range. I thought it sounded lovely though!

[m1bjr]

Yep, I commented on this to Neil in another thread earlier this week.

Pulls like a train on map2, even better than before. No issues either, just more grunt everywhere.
Perhaps the fuelling has been optimised a little better.

[m1bjr]

Originally Posted by Boz335i

First off tried the map 8 (turbos off!), comes up with a CEL, but I'd expect that.
Now this felt really strange, it just felt slow. Would this be the same as 325i or 330i? Now I know these cars aren't slow, but in comparison they do feel it.

No.
Generally lower compression is found in purpose designed turbo engines.
And you also sapping energy turning two turbines in the exhaust stream that now do nothing.
And of course the tuned exhaust manifold of the N/A car is also not present.
And lots of other things mean its performance without turbo is nothing like the N/A 330i


Whats the intention of MAP8?
Just a 'valet' mode for drivers you dont trust?

[neil@JuicedUpTuning]

Originally Posted by m1bjr

Yep, I commented on this to Neil in another thread earlier this week.

Pulls like a train on map2, even better than before. No issues either, just more grunt everywhere.
Perhaps the fuelling has been optimised a little better.

Revised fueling and a bit more boost on MAP 1

Originally Posted by m1bjr

Whats the intention of MAP8?

Dont think it has any real purpose other than maybe R&D. Good for kicks! The CEL is a known issue (beta firmware)

[Josh1a1h]

I SO NEED TO UPDATE!!!

I am on very old firmware i believe on my JB4... and continoussly beat V8 M3s (i have no other mods).... So excited to try the update.

Neil,.. if you run map 8 (no turbos)... does that mean you get tremendously increased fuel economy? Yes you get loos of power, but for doing round the town driving, it could work without damaging anything?

[doughboy]

Originally Posted by Josh1a1h

Neil,.. if you run map 8 (no turbos)... does that mean you get tremendously increased fuel economy? Yes you get loos of power, but for doing round the town driving, it could work without damaging anything?

No, you'll get worse economy, turbo system design is to increase efficiency these days that's why they're de-rigeur for increasing fuel economy.

On MAP8 you've just got low compression ratio plus all the untuned restrictions of the intake runs / intercooler / pipework etc and the exhaust restriction of the turbine housings themselves (the wastgate opening is only about 20mm dia).

All just conspiring to make the engine sluggish and inefficient.

As said, nothing like a NA 330i for example,

[doughboy]

Originally Posted by m1bjr

Whats the intention of MAP8?
Just a 'valet' mode for drivers you dont trust?

It would fix any wastegate rattle!

[doughboy]

Originally Posted by Boz335i

Another thing, I'm sure there's an explanation for this, but my perf Exhaust got louder, really loud, not in a bad way, but people started looking at me

Thats because the turbine blades act as another silencer, helping to muffle the exhaust pulses.

When the wastegates are fully open these pulses just pass right through, making it louder at the tailpipe. (normally the WG are rarely open accept under deceleration, but in that case fuel is cut off so there is no combustion exhaust pulse anyway)

I noticed this before, when diagnosing wastegate rattle, if you pull a vacuum hose off one of the vacuum bottles then both wastegates drop fully open, at idle you can hear the exhaust note jump up quite a notch.

[Boz335i]

Originally Posted by doughboy

As said, nothing like a NA 330i for example,

thanks, I realised after posting that it was a stupid thing to say. My last car was 250 bhp and that was much quicker than map 8.

p.s. thanks for the exhaust explanation.

[Josh1a1h]

Originally Posted by doughboy

No, you'll get worse economy, turbo system design is to increase efficiency these days that's why they're de-rigeur for increasing fuel economy.

On MAP8 you've just got low compression ratio plus all the untuned restrictions of the intake runs / intercooler / pipework etc and the exhaust restriction of the turbine housings themselves (the wastgate opening is only about 20mm dia).

All just conspiring to make the engine sluggish and inefficient.

As said, nothing like a NA 330i for example,

Thanks for the response! I need to update! Maybe this weekend.

[Bee Pee]

From reading various threads and tech specs for both JBx and Procede, in NA mode you would be lucky to see ~170BHP.

While it may be useful for a "valet" mode [think red Ferrari in Ferris Buellers Day Off], as Doughboy says, its a myth abt being more economical + would not recommend extended use as its likley to mess up yr adaptions.

[lee335]

Hello,

Could someone point me in the right direction to get the latest software please?

thanks in advance Lee

[doughboy]

Originally Posted by lee335

Hello,

Could someone point me in the right direction to get the latest software please?

thanks in advance Lee

Post 1 - http://www.n54tech.com/forums/showthread.php?t=10605

Everything's there, have a good read - enjoy

[Boz335i]

My fuel consumption has gone down on map 5
16.5 mpg to 18.2. Every little helps!

I still find map 5 a bit jumpy, even after several WOT runs, not convinced by it.

[neil@JuicedUpTuning]

Originally Posted by Boz335i

My fuel consumption has gone down on map 5
16.5 mpg to 18.2. Every little helps!

I still find map 5 a bit jumpy, even after several WOT runs, not convinced by it.

Log and sent to us.

[m1bjr]

Its fine here, both five and two.

Two is more consistent in the logs, runs to 15PSi constantly and I only have I/C now.

Steve