[SteveH1]

Hi,
I'm sure this subject's been covered a thousand time so apologies in advance but for me it's important.

Has anyone has a 45e ECU tune, either by remap or by tuning box?

How does it perfume after?

I had a 2021 X3 M40i with a remap to 450bhp, it was amazing.

We had it removed prior to sale & BMW called to say they'd detected a previous tune & so the warranty was void. It'd been in for 2x services & some warranty work, both times the tune had first been removed. BMW said they now do a deep dive & can find anything?

I'd really like to have my 45e (when it arrives) tuned but am nervous..

Any feedback would be much appreciated.

[nZtiZia]

X5 45e chiptuning https://g05.bimmerpost.com/forums/sh....php?t=1684493

interesting your M40i warranty was void after tuning yet still want to do it on your 45e. I feel bad for whoever purchases your vehicles after you're done with them. it's this lack of open disclosure that prevents me from ever buying used.

[nZtiZia]

the 45e has another element with significant warranty implications, its HV battery. U.S. model's usable capacity is lower than EU so a few have modified theirs to EU capacity. initially, they said BMW can't see it, but I proved one way they can: obtaining the vehicle's telematics report. whether this constitutes their "deep dive" regarding the HV battery, I'm unsure. that being said, it costs ~$22k to replace (I know of two folks going through this now), so it's something else to consider whether for yourself or whoever takes ownership after you.

[scungilio]

Originally Posted by nZtiZia

X5 45e chiptuning https://g05.bimmerpost.com/forums/sh....php?t=1684493

interesting your M40i warranty was void after tuning yet still want to do it on your 45e. I feel bad for whoever purchases your vehicles after you're done with them. it's this lack of open disclosure that prevents me from ever buying used.

Buying used is always a crap shoot and that is why I have bought new for the past 25 years.

[atlas]

They can definitely tell, even with piggy backs.

[scungilio]

Originally Posted by atlas

They can definitely tell, even with piggy backs.

Absolutely true for a full ECM flash that yields profound levels of power increases.
It is debateable with a piggy back that makes no chages to any of the targets in the ECM and especially one that is only adding 3 lbs or so. The service detectives will really be splitting hairs as overboost situations occur without any external intervention.

[atlas]

Originally Posted by scungilio

Absolutely true for a full ECM flash that yields profound levels of power increases.
It is debateable with a piggy back that makes no chages to any of the targets in the ECM and especially one that is only adding 3 lbs or so. The service detectives will really be splitting hairs as overboost situations occur without any external intervention.

If it's such a minor tune then why bother risking the warranty?

[scungilio]

Originally Posted by atlas

If it's such a minor tune then why bother risking the warranty?

Good question indeed.
I would not bother on a 40i and absolutely not on a 45e with all its relatively new tech and layers of complication etc.
V8s see very nice gains with piggy back devices like RaceChip, JB4, and a few others. I've seen dragy results with RaceChip on an M50i at 3.5 seconds 0-60 which is smokin fast for a 5,200 lb. SUV.

[Longboarder]

Originally Posted by scungilio

Good question indeed.
I would not bother on a 40i and absolutely not on a 45e with all its relatively new tech and layers of complication etc.
V8s see very nice gains with piggy back devices like RaceChip, JB4, and a few others. I've seen dragy results with RaceChip on an M50i at 3.5 seconds 0-60 which is smokin fast for a 5,200 lb. SUV.

Agree. 2-3 psi increase from RaceChips and this SUV is pretty quick. Should run a low 11 in the 1/4 mile at around 121mph. This is all at sea level and the 2-3psi extra would still be within factory spec at higher elevation on a hot day. So could BMW figure it out? Impossible if they are only looking at boost values. Now having boost and density altitude together? Maybe. How far do they go investigating boost values that are within factory spec?

[scungilio]

^^^^Pretty sure that the low 11 estimate and the 3.24 0-60 Draggy is for an X5MC that was posted in the X5M/X6M section of this forum not so long ago.
These are all crazy #s for vehicles of this weight, amazing.

[kfer]

I use a box from the German manufacturer Speedbuster in my X45e. Similar in principle to RaceChip, but has more input channels. The car was measured before/after and brought around +80hp / 120Nm. But the original was already clearly upwards...measured around 440hp. It seems that the 45e has about the same power as the 40i and not 286 PS as declared. After tuning has now 523 hp/746Nm. No problems so far, but I've only driven 15,000km.

[Phyll]

Originally Posted by kfer

I use a box from the German manufacturer Speedbuster in my X45e. Similar in principle to RaceChip, but has more input channels. The car was measured before/after and brought around +80hp / 120Nm. But the original was already clearly upwards...measured around 440hp. It seems that the 45e has about the same power as the 40i and not 286 PS as declared. After tuning has now 523 hp/746Nm. No problems so far, but I've only driven 15,000km.

Hi kfer. Would U bo so kind and let me know your experience with Speedbuster box? Any issues so far? Does it accelerate smoothly as stock? Does gearbox work well with no jerks? Any recommendations on how to install it? Which setting do you find the optimal. Thanks im advance.
I just ordered one for my 22 45e

[kfer]

Originally Posted by Phyll

Hi kfer. Would U bo so kind and let me know your experience with Speedbuster box? Any issues so far? Does it accelerate smoothly as stock? Does gearbox work well with no jerks? Any recommendations on how to install it? Which setting do you find the optimal. Thanks im advance.
I just ordered one for my 22 45e

I have no problems with the box, everything works fine. The power curve is similar to the stock, a bit more pronounced in the middle range (see diagram).
I would suggest the app. to order, then you can easily change the levels. Level 6 (sport) is the default setting and in my experience you get the best performance at level 8 (but it depends on the car). It was measured at level 8 with RON95. Maybe with RON100 you can also go higher. According to the manufacturer, one level means approx. 2%

performance :
0-200km/h is 16.97sec on slope 0.81% (corrected to 0% slope 16.19sec)

[Phyll]

Thank you. Did you dyno it right after you installed the box? I was told to do around 400 km with the box before dyno check as the gearbox needs time for adjustment.
And how about pushing hard on summer on hot conditions, no check engine signs?

[kfer]

I really haven't had any problems (neither thermal nor otherwise). The dyno run was 1 week later, but I don’t think there would be a difference.
But if you're afraid of the box, you'd better let the DME unlock it and go for a flash.
I did it on my Z4 for a turbo upgrade and it was all super quick and easy (I sent to Femto on Tuesday afternoon and it was back in the car on Friday). But to be honest I wouldn't do it for a stage 1/2 with OTS as the difference between box and MHD OTS RON98 map isn't that much . MHD is stronger on top but has a bit less torque on bottom. ( Certainly looks better with a custom tune or turbo upgrade. )

[Phyll]

Thank you. I know the unlock option and it would certainly add much more torque. Will start with the box thou and see how it works out.

[Phyll]

Originally Posted by kfer

I have no problems with the box, everything works fine. The power curve is similar to the stock, a bit more pronounced in the middle range (see diagram).
I would suggest the app. to order, then you can easily change the levels. Level 6 (sport) is the default setting and in my experience you get the best performance at level 8 (but it depends on the car). It was measured at level 8 with RON95. Maybe with RON100 you can also go higher. According to the manufacturer, one level means approx. 2%

performance :
0-200km/h is 16.97sec on slope 0.81% (corrected to 0% slope 16.19sec)

Thanks for your recommendation. I measured on lvl 4 and got 514HP and 700 Nm with very safe logs. The difference is immense. Pulls hard and much more responsive in middle RPM range. I got CEL on lvl 8 on the dyno as EGT was too high so left it on sport(4). The stock was 426 hp and 572 Nm.

[Phyll]

And interestingly HP and Nm gain was smaller on lvl 6 and 8.

[kfer]

Originally Posted by Phyll

Thanks for your recommendation. I measured on lvl 4 and got 514HP and 700 Nm with very safe logs. The difference is immense. Pulls hard and much more responsive in middle RPM range. I got CEL on lvl 8 on the dyno as EGT was too high so left it on sport(4). The stock was 426 hp and 572 Nm.

It's interesting because you have about the same gain as me but on a lower setting (level 4 vs level 6-8).
88HP (20.65%) in power and 128Nm (22.38%) in torque - mine was 81HP and 130Nm.
The good news, that the box seems to work and delivers a lot of power :-)
Have you tried Map6/8 on the street? For me, the performance on the dyno and during the road measurement was a bit different.
Dyno : 442.8hp@5745rpm and 592Nm@2775rpm
Street : 442.4hp@5742rpm and 616Nm@3452rpm .
So the power was the same at the same rpm, but max torque was 700rpm earlier on the dyno.

[Phyll]

Originally Posted by kfer

It's interesting because you have about the same gain as me but on a lower setting (level 4 vs level 6-8).
88HP (20.65%) in power and 128Nm (22.38%) in torque - mine was 81HP and 130Nm.
The good news, that the box seems to work and delivers a lot of power :-)
Have you tried Map6/8 on the street? For me, the performance on the dyno and during the road measurement was a bit different.
Dyno : 442.8hp@5745rpm and 592Nm@2775rpm
Street : 442.4hp@5742rpm and 616Nm@3452rpm .
So the power was the same at the same rpm, but max torque was 700rpm earlier on the dyno.

I didn’t try maps 6 up on the road as dyno guys told me not to use it as it will catch CEL. The speed buster technician said this is pretty common for one car to get best results on lower levels than others.

[Phyll]

Originally Posted by kfer

I have no problems with the box, everything works fine. The power curve is similar to the stock, a bit more pronounced in the middle range (see diagram).
I would suggest the app. to order, then you can easily change the levels. Level 6 (sport) is the default setting and in my experience you get the best performance at level 8 (but it depends on the car). It was measured at level 8 with RON95. Maybe with RON100 you can also go higher. According to the manufacturer, one level means approx. 2%

performance :
0-200km/h is 16.97sec on slope 0.81% (corrected to 0% slope 16.19sec)

Hi! Did you measure 100-200kmh time? I got 11,6 s vs 16,2 stock!

[kfer]

Originally Posted by Phyll

Hi! Did you measure 100-200kmh time? I got 11,6 s vs 16,2 stock!

Yes. 11,17 sec is the best if started from 4th gear and about 0,2-0,3sec slower from 3rd.
Stock was 15,43sec.