BMS Tune - N63 Stage 1

[Timberwolf]

Guys there is some good information here. I think this is the place to ask specific BMS tuning questions. I don't think Terry can comment here. Instead of speculating, probably better off hearing straight from the source.

http://www.n54tech.com/forums/showthread.php?t=18035

[Boss330]

Originally Posted by Protious

Seems a bit weird, that would mean the ODB port is reporting incorrect information? From my understanding, other implementations (such as the wireless one that you use apps on your smartphone to see), work the same way?

Originally Posted by gmd2003

I agree it is odd, and admit the problem with the P3 gauge boost readings on the Z4M was the included Boost monitoring tap. It should be able to get good sampling data from the ECU from the OBD on a car that is monitoring it live but it may be a problem with the sampling rate.

The S63 has the same boost programming as the S55. It only applies full boost in high temp, high altitude situations so that it achieves the same performance even under far from ideal conditions. At sea level and normal temps you will not see the full boost.

[Soorena]

Originally Posted by Boss330

The S63 has the same boost programming as the S55. It only applies full boost in high temp, high altitude situations so that it achieves the same performance even under far from ideal conditions. At sea level and normal temps you will not see the full boost.

I think the usage of "full boost" here is a bit misleading. Full boost means hitting boost target. At any condition cars will hit their boost target so in other words they will go full boost, it's just the targets that may vary in different conditions (temps, altitudes etc..).

[Boss330]

Originally Posted by Soorena

I think the usage of "full boost" here is a bit misleading. Full boost means hitting boost target. At any condition cars will hit their boost target so in other words they will go full boost, it's just the targets that may vary in different conditions (temps, altitudes etc..).

I guess it all just depends on the definition you choose on "full boost". If full boost is defined to mean the maximum achievable absolute manifold pressure, my use of "full boost" is correct.

However if you define "full boost" to simply mean the maximum target boost for the conditions, then yes, it always achieves "full boost" even though that might be 7Psi below the absolute maximum boost level.

I would prefer to say that the engine reaches it's target boost in all conditions, but that the target boost might be lower than it's theoretical/achieveable full boost pressure.

[M5Rlz]

[greentrbo95gst]

Originally Posted by Spinny02

Well I bit the bullet... Purchased the BMS stage 1.
As per the guide I have it's set to "3".
My butt dyno definitely feels a notice gain in tq.

Add me to the list of happy customers

What gas are you using?

[M5Rlz]

Originally Posted by Spinny02

93. The old firmware he recommend "2.25"on the new he says run "3" for pump gas.

Oh sweet I'm going to up it thanks

[stealth.pilot]

Originally Posted by Spinny02

So the BMS adds so much tq that my traction control comes on during multiple shifts when I gun it. May have to tone it back to 2.75 or 2.5. Anyone else noticing this ?

Before the BMS I would notice TC come on in first and sometimes second only.

That's strange. I have TC come in 1-4th gears on my OEM spec car.

[greentrbo95gst]

No traction control here.
I control it with my right foot. Keep in mind I would only do it while going straight line. MDM in the twisties.

[Hoopumpers]

Originally Posted by greentrbo95gst

No traction control here.
I control it with my right foot. Keep in mind I would only do it while going straight line. MDM in the twisties.

Nah. DSC off all the time.

Tune is running great. Thanks greentrbo95gst

[boots]

I received mine in the mail yesterday. Thanks greenT. I want to Dyno b4/afterwards but my wk schedule just won't allow me to. Hopefully I can get something to work out

[Hoopumpers]

Boots, it would be great to have some independent dyno tests. I didn't do that.

My 0-60 times are actually slower, as it's hard to get traction.

[boots]

I'm gonna do my best to c what I can get done during my lunch time then if have to reschedule for another day. I would like same day results though. I thought I'd have a chance to install it today but don't look like it so ill c if I can get in a Dyno run w in the next couple days

[Hoopumpers]

Supposedly the ECU may need time to adjust, so you may want to do dyno runs after some driving. I'm not sure if this is really true or not though. If the piggyback is tricking the ECU into thinking it's boosting less, I'm not sure why it needs time to adapt. Anyone?

[greentrbo95gst]

Originally Posted by Hoopumpers

Nah. DSC off all the time.

Tune is running great. Thanks greentrbo95gst

You need to try race gas and up the boost over stock.

[greentrbo95gst]

Originally Posted by Hoopumpers

Supposedly the ECU may need time to adjust, so you may want to do dyno runs after some driving. I'm not sure if this is really true or not though. If the piggyback is tricking the ECU into thinking it's boosting less, I'm not sure why it needs time to adapt. Anyone?

In theory it should be recognized right from the start, but it seems that our ECU's are very inconsistent with the time that it takes to realize different variables. I would suggest couple driving cycles with couple WOT pulls and it should be good to go.

[boots]

Don't worry. A couple of engine cycles should only take me about 30 minutes doing the posted speed limit of course. Lol I found out today I will not be able to Dyno before so I'll just get it installed and then Dyno after-the-fact best I can do

[Northern X5M]

Originally Posted by boots

Don't worry. A couple of engine cycles should only take me about 30 minutes doing the posted speed limit of course. Lol I found out today I will not be able to Dyno before so I'll just get it installed and then Dyno after-the-fact best I can do

Yeah just do it. I think we have enough data logged. ET's are all over the map but trap speeds are within 1-2mph from coast to coast. Mine is sitting in my back seat. I only have about 1300km on the car, was hoping to getting a few more before strapping the module on. my 19" drags are in, but the track is resurfacing the 1/4 mile this weekend. WTF!

[boots]

I got my Bms installed today and I broke it in tonight with some strong azz pulls. I can report that mid range is stronger. 3rd gear spins sometimes at full pedal runs. Above xxx the car seems to really pick up speed. First runs I was using the paddles. Now in MdM the car is really faster now. In that mode, I think I really had more fun at one point I said yea the damn thing is faster and started laughing. 2nd-3rd gear was fun. You wont know unless you get one and let the ecu adapt. Try this one in MdM w/ trackson off...not fully off. 0 speed, then stomp on it. So much fun. So yes I am a believer. Ok that's my review. I got to add more camel toe pics to my car chick thread.

[greentrbo95gst]

Originally Posted by boots

I got my Bms installed today and I broke it in tonight with some strong azz pulls. I can report that mid range is stronger. 3rd gear spins sometimes at full pedal runs. Above xxx the car seems to really pick up speed. First runs I was using the paddles. Now in MdM the car is really faster now. In that mode, I think I really had more fun at one point I said yea the damn thing is faster and started laughing. 2nd-3rd gear was fun. You wont know unless you get one and let the ecu adapt. Try this one in MdM w/ trackson off...not fully off. 0 speed, then stomp on it. So much fun. So yes I am a believer. Ok that's my review. I got to add more camel toe pics to my car chick thread.

Yes please!!

[boots]

Stand by as I have to take pics

[greentrbo95gst]

Thank God for ALT+TAB