[marconi118]

As far as I understood stage 2 is already in beta stage.

I would contribute asking 2 extra features to stage 2 that may be included in the final version, this could be useful to N54 community:

1) The OEM DME raises the boost to compensate for hot climate, 8PSI in cold weather and 11PSI in hot. This is a compensation for hot IAT to obtain constant 400Nm torque. But if the turbo can sustain 11PSI in hot IAT they could do it in cold IAT optimally...

So please Giac could you disable this compensation and allow the boost to be the max of stage2 even on cold IAT? Of course we will have more torque in cold weather than in hot climate but at least when it becomes cold we can enjoy some extra... This would be useful for the ones that will use methanol injection, if they spray before IAT sensor, the IAT drop will drop the boost... not really what expected.

2) Like ESS is doing, propose the option to disable SES error when running catless DPs, to avoid O2 sims and so on...

[Seth@TechnicalDimensions]

Originally Posted by marconi118

As far as I understood stage 2 is already in beta stage.

I would contribute asking 2 extra features to stage 2 that may be included in the final version, this could be useful to N54 community:

1) The OEM DME raises the boost to compensate for hot climate, 8PSI in cold weather and 11PSI in hot. This is a compensation for hot IAT to obtain constant 400Nm torque. But if the turbo can sustain 11PSI in hot IAT they could do it in cold IAT optimally...

So please Giac could you disable this compensation and allow the boost to be the max of stage2 even on cold IAT? Of course we will have more torque in cold weather than in hot climate but at least when it becomes cold we can enjoy some extra... This would be useful for the ones that will use methanol injection, if they spray before IAT sensor, the IAT drop will drop the boost... not really what expected.

2) Like ESS is doing, propose the option to disable SES error when running catless DPs, to avoid O2 sims and so on...

Giac will always do what is in the best interest of engine safety as well as providing the best power available in all conditions. If they think that is acceptable, i'm sure it will be incorporated

As far as SES faults and anything emissions relevant, GIAC will NOT disable that. Its a federal crime to do so with stiff monetary penalties and potentially jail time for the principals.

[enrita]

I think they will do an exception for EU maps since we dont have same rules here.

[marconi118]

they could sell this special version with SES disabled only for race use and to export to europe... BMS O2sims and procede are doing the same

As far to the boost decacy I don't think it will hurt the engine or turbos, if thy can handle higher boost with hot IAT then they can hold it even easier at lower IAT.
This boost decacy is only marketing from car manufacturers to claim that their car have consistent and reliable performance with weather temperature change. But for US tuning freaks the more power the best, so if we can have more torque in cold weather or using methanol to cool IAT sensor it would be GREAT.

[Former_Boosted_IS]

Originally Posted by marconi118

they could sell this special version with SES disabled only for race use and to export to europe... BMS O2sims and procede are doing the same

As far to the boost decacy I don't think it will hurt the engine or turbos, if thy can handle higher boost with hot IAT then they can hold it even easier at lower IAT.
This boost decacy is only marketing from car manufacturers to claim that their car have consistent and reliable performance with weather temperature change. But for US tuning freaks the more power the best, so if we can have more torque in cold weather or using methanol to cool IAT sensor it would be GREAT.

I don't think you understand boost decay. Boost decay is to protect your engine from knocks. You must taper boost with high IATs or you will induce knock.

[marconi118]

maybe" boost decacy" is not the right word... I don't mean the protection mechanism that reduces boost at extremely high IAT to protect turbos and engine.

I mean the opposite: OEM DME raises the boost on hot IAT (but not extreme IAT where it dims boost again) to maintain constant torque output even if charge air is hotter. stock is 8 PSI in cold 25°c and 11PSI in hot 50°C. If we inject methanol before TMAP sensor the boost will be 8 PSI instead of possible 11PSI

It would be great if stage 2 could hold the same boost at 25°C or 50°C IAT but of course reduce boost with extreme high IAT to protect the engine.

[enrita]

A flash does not work like a piggy. What you want is a constant power delivery on all conditions and let the ECU decide the best conditions to reach the same target over and over. I am boosting 1 psi less now in sweden after temp. have gone down 10-15 C from when i have flashed STage 2.

[marconi118]

BMW wants constant power delivery on all conditions it will give normal driver the feeling of consistent and robust car, but for us tweakers if we can have more TQ/HP in cold weather it would be even better!

with cold IAT engine and turbos can hold higher boost without problems: no knocking in the engine and because air is more dense the turbos have to spin the same for higher PSI.

But unfortunately it seems that stage 2 beta dims boost in cold IAT like Enry states.
If Giac could change it I think this would be a real PLUS over other flashes: great TQ/HP in hot weather and even more in the cold!

And again if we use methanol injection spray over the TMAP sensor (99% of the case in N54 engine) IAT reading by the DME will be really low:
it is good because ignition timing advance will be added allowing more torque
it is BAD because boost will at least dimmed by 3 - 4 PSI

remember as stated in the meth kit tread the drastic cooling effect of methanol sprayed near the TMAP at least 20-30°C

[enrita]

Than Giac is not your type of tune.

[marconi118]

until now no flash tune is taking this in account

But I think this is a real need for a lot of us especially the ones with meth kit.

Don't you Enry (and all of us) would appreciate if with the cold winter coming you would have 10% extra TQ than in summer?

[marconi118]

and of course I am looking for a flash for his smoothness, reduction of lag, 6MT shift lag and prevention of trottle plate closure at high RPM etc...


difficult things to have with jb3 or procede

[enrita]

Boost is not everything. Believe me you dont need to boost more with a well done flash. For meth there will be a special race map.

[Alpina_B3_Lux]

Originally Posted by enrita

I think they will do an exception for EU maps since we dont have same rules here.

I would also assume this. ESS does the same, actually (as do other European tuners).

Enrita, what setup did the Noelle car in your video have? I just watched it, and besides that it's a touring (i.e. heavier than yours which is a Coupé I guess), is there any fundamental difference in your mods? Which flash does it have, i.e. also the 400hp one? You seem to distance it quite clearly! I might test the GIAC flash in order to see whether there's an improvement over the Evotech or not.

Alpina_B3_Lux

[enrita]

Was the strongest Noelle flash with all bolt ons like my car . He had as well 20 inch rims which make the car slower.
I did not only have stage 1 . I stacked a jb+ on top of it so i was boosting 15,2 psi. 

[marconi118]

more boost + cold IAT + proper spark timing + proper Air/ Fuel ratio = more torque

Of course too high boost with high IAT leads to knocking, then DME reduces spark timing = less torque

Making some inaccurate number supposition to explain what I mean:
If the flash gives 530Nm at 15PSI at 50°C IAT it will give 530Nm at 13PSI at 20°C IAT
But if the flash holds 15PSI at 20°C and gives proper fueling and spark timing, maybe could will give 560Nm

I know that the OEM DME strategy is to achieve torque targets and not boost targets... but our goal is to push out the max of our small turbo, so to work at constant boost and achieve more TH/HP at cold IAT

[marconi118]

Originally Posted by enrita

Boost is not everything. Believe me you dont need to boost more with a well done flash. For meth there will be a special race map.

Boost is essential... why did you put JB+ on top of stage 1

[marconi118]

if you don't change any mechanical part of the engine, at the the same boost level and fuel type one flash can give more TQ/HP over another only because of better optimized spark timing, fuelling A/F ratio and vanos phase.


So of we assume that GIAC will optimize to the max these parameters the only way to achieve more HP/TQ is more boost at cold IAT

[enrita]

Yes on stage 1 i had to boost more otherwise i would have stayed home from the race. Also stage 1 did not run well on my car because i was overboosting the targets.

[shifterboy45]

whats your initial impressions on Stage 2beta vs Stage 1?

[enrita]

that it fits my mods perfectly and that i have a very fast car :-) very smooth and consistent power all the way to redline.

[shifterboy45]

congrats!! update us when you get the full release

[marconi118]

if IAT cools down like in this post http://www.e90post.com/forums/showth...=1#post5995619

Then boost drop with low IAT is BAD and prodices less TQ than expected, this is wy I request to eliminate (it is possible) this boost correction in the GIAC stage 2