[bluewater328]

This is getting interesting!!!

[GtiGyver]

Hass, Rjahl, are you guys modifying N54 maps or N52?

If its an N52, how did you get the XDF files?

[hassmaschine]

Originally Posted by rjahl

Hass,

I only modified the one map.

IP_FAC_VS_PV_bas_cor_tct

There are others who migrated all of the M3 settings to the N54. I have not testing anything else.

What car are those values from? the Z4M is a lot closer to the regular N52 values than those are. 335is or 1M? Or F30M3?

If those values work and aren't glitchy, I'd like to try them for sure. the Z4M values seem like a nice middle ground though, my wife still drives this car after all. She's not rev matching her down shifts.

BTW, those axis values are definitely KPH, not MPH. Not sure why mine says kg/h instead of kp/h - probably a typo in the original damos file. not that it really matters, lol.

Anyway, the first map is just PV vs RPM. I bet you could set that all to 1.0. The second curve is multiplied over top of that, then the final pedal value is determined..

[hassmaschine]

Originally Posted by GtiGyver

Hass, Rjahl, are you guys modifying N54 maps or N52?

If its an N52, how did you get the XDF files?

I made them with probably over a thousand hours of work over many years. There's damos files for basically all the new models, which is nice, but prior to MSD81 it's a lot more difficult.

[rjahl]

Those two maps are E89 z4 355IS N54 stock vs. my modified values

The Z4 35I values are only slightly slower

[rjahl]

Did you look at the old E85 Z4 throttle delay maps? They look more aggressive then the 330s.

I really don't think you can do much harm here. I have my delays pretty low and the DCT is fairly unforgiving. No clutch or torque converter to soften the power transfer.

[rjahl]

More information from the N 54 sections can be found here.


https://www.e90post.com/forums/showthread.php?t=1610143

[fastboatster]

Didn’t know you had e85 maps. These would be very welcome in California right now, I’d love to have even basically stock power e85 tune for my n51.

[hassmaschine]

He's talking about the E85 Z4. Not E85 fuel.

IMO, E85 fuel is pointless on an N/A N52 or N51. you're not going to make more power (possibly less), and even though it can be cheaper per gallon, you're going to use a lot more of it. Plus the pump and injectors would need upgraded to flow enough.

[fastboatster]

Originally Posted by hassmaschine

He's talking about the E85 Z4. Not E85 fuel.

IMO, E85 fuel is pointless on an N/A N52 or N51. you're not going to make more power (possibly less), and even though it can be cheaper per gallon, you're going to use a lot more of it. Plus the pump and injectors would need upgraded to flow enough.

Lol. I mean, e85 is 2.77 per gallon and 91 is like 4.25, so even if we use more e85, still might be worth it( if my math is correct which is not always the case). It sucks if stock fuel injectors can’t handle the extra flow for the stock level e85 tune( guess I’ll need to convert my other vehicle to a “corn” diet, provided of course I’ll get it to run right after all those months)

[wootloops]

Originally Posted by hassmaschine

I made them with probably over a thousand hours of work over many years. There's damos files for basically all the new models, which is nice, but prior to MSD81 it's a lot more difficult.

Are you willing to sell any of your XDF files? I'm looking for one for my N51 128i.

[hassmaschine]

Originally Posted by rjahl

More information from the N 54 sections can be found here.


https://www.e90post.com/forums/showthread.php?t=1610143

To follow up on this - I tested it on my own car today, and YES it definitely makes a difference!

I adjusted the curve and the map. At first, I basically mimicked what they showed in that N54 thread:
https://www.e90post.com/forums/showp...6&postcount=19

But with the full throttle part of the map set to 0 - it didn't really work. Well, throttle response was great, except when you went to full throttle, it felt like the throttle was actually closing, like a rev limiter. So I went back and set that whole map to 1, and left the curve as I had modified it - the throttle response was still great, and now full throttle works.

Without testing on the N54, I can only speculate that it's used differently in the subroutine (or whoever posted that map never actually went to full throttle?). Maybe it's multiplied somewhere, which ends up setting the commanded throttle set point to 0 or some small value. I might try a minimum value of 0.5, but for now, I'm happy with it as-is.

I was a little worried about low speed especially with the no-MAF tune. But it was fine. I can still crawl along at idle in 1st gear - minimum speed is about 2-3mph.

[rjahl]

Originally Posted by hassmaschine

To follow up on this - I tested it on my own car today, and YES it definitely makes a difference!

I adjusted the curve and the map. At first, I basically mimicked what they showed in that N54 thread:
https://www.e90post.com/forums/showp...8;postcount=19

But with the full throttle part of the map set to 0 - it didn't really work. Well, throttle response was great, except when you went to full throttle, it felt like the throttle was actually closing, like a rev limiter. So I went back and set that whole map to 1, and left the curve as I had modified it - the throttle response was still great, and now full throttle works.

Without testing on the N54, I can only speculate that it's used differently in the subroutine (or whoever posted that map never actually went to full throttle?). Maybe it's multiplied somewhere, which ends up setting the commanded throttle set point to 0 or some small value. I might try a minimum value of 0.5, but for now, I'm happy with it as-is.

I was a little worried about low speed especially with the no-MAF tune. But it was fine. I can still crawl along at idle in 1st gear - minimum speed is about 2-3mph.

Nice job, you do realize you are about to get a dozen requests for updated files!

[E92_William]

Which is literally what I want to get on the car now^

[hassmaschine]

I'd be happy to update custom tunes. It's a little hard to keep track of though. Actually to make it easier I can just go through and post updated tunes to people's accounts instead of trying to stay in contact with everyone..

I'm not sure I will update the free tunes, probably not, they're meant to be basically "what if BMW didn't make the 328i/325i slow on purpose" rather than full tunes.

[E92_William]

Makes sense that's more of an upgrade on top of a stock car; this makes the idea of getting a custom tune that much more enticing, and this is not a fake throttle multiplier like a powerbox. Dropped bimmerlabs an email when you have a slot open for one, looking to try tuned for headers before MILVs

[hassmaschine]

yeah, all the power box does is basically make 25% throttle = 50%, 50% throttle = 75%, and 75% throttle = 100%. It can't affect lag or response at all, because that is added after the pedal position is measured. It's completely pointless.

[tsk94]

Slight change of topic, but I'm looking for some insight.

This past winter I swapped in an IAT and did the no MAF tune from Bimmerlabs on my 128i. I had previously done the 128 to 130 tune from Bimmerlabs and the car had been running great for 3 years. After swapping in the IAT and putting on the no MAF tune, the car would cold start terribly. Had a very rough cold start idle and would throw a CEL for cylinder misfires. It would eventually get better after driving but I didn't want to deal with that and assumed maybe the used IAT I bought was no good.

I swapped back in the MAF and put to the 130i tune back on. Just uploaded the tune, no RSA delete in between the swaps. The car runs much better now, but even with MAF back installed and back on the 130i tune I'm still experiencing some slightly rough cold starts (nothing like with the IAT though). Never had this issue before playing around with IAT then going back to the MAF, so I'm not quite sure what could cause this problem. The only difference being is the past year the car has been sitting for prolonged periods of time and hasn't been driven much at all. Otherwise I'm back using the same MAF and the same tune that for over 3 years gave me no problems.

Could something have gone wrong between swapping back and fourth between the no MAF and standard 130i tunes? I didn't RSA delete in between as I was told I shouldn't need to. A bit perplexed as to what the issue could be. The car has no fault codes and after 5-30 seconds the car is back to idling normally. Drivability is fine once the initial rough idle passes and the car seems to make power like normal and pulls strong. Any ideas???

[bluewater328]

Originally Posted by E92_William

Makes sense that's more of an upgrade on top of a stock car; this makes the idea of getting a custom tune that much more enticing, and this is not a fake throttle multiplier like a powerbox. Dropped bimmerlabs an email when you have a slot open for one, looking to try tuned for headers before MILVs

Also jumping on bandwagon. Interested in this as well.

[hassmaschine]

Originally Posted by tsk94

Slight change of topic, but I'm looking for some insight.

This past winter I swapped in an IAT and did the no MAF tune from Bimmerlabs on my 128i. I had previously done the 128 to 130 tune from Bimmerlabs and the car had been running great for 3 years. After swapping in the IAT and putting on the no MAF tune, the car would cold start terribly. Had a very rough cold start idle and would throw a CEL for cylinder misfires. It would eventually get better after driving but I didn't want to deal with that and assumed maybe the used IAT I bought was no good.

I swapped back in the MAF and put to the 130i tune back on. Just uploaded the tune, no RSA delete in between the swaps. The car runs much better now, but even with MAF back installed and back on the 130i tune I'm still experiencing some slightly rough cold starts (nothing like with the IAT though). Never had this issue before playing around with IAT then going back to the MAF, so I'm not quite sure what could cause this problem. The only difference being is the past year the car has been sitting for prolonged periods of time and hasn't been driven much at all. Otherwise I'm back using the same MAF and the same tune that for over 3 years gave me no problems.

Could something have gone wrong between swapping back and fourth between the no MAF and standard 130i tunes? I didn't RSA delete in between as I was told I shouldn't need to. A bit perplexed as to what the issue could be. The car has no fault codes and after 5-30 seconds the car is back to idling normally. Drivability is fine once the initial rough idle passes and the car seems to make power like normal and pulls strong. Any ideas???

Swapping tunes wouldn't affect anything. You only need to do the RSA delete (which "unlocks" the DME) once. you can flash the stock tune too, as long as it matches that hardware version.

What do your fuel trims look like? If there's an issue with the engine (like a vac leak or something), the MAF can mask it a little, but yeah, the no-MAF tune will not like it. Do you have headers?

[tsk94]

Originally Posted by hassmaschine

Swapping tunes wouldn't affect anything. You only need to do the RSA delete (which "unlocks" the DME) once. you can flash the stock tune too, as long as it matches that hardware version.

What do your fuel trims look like? If there's an issue with the engine (like a vac leak or something), the MAF can mask it a little, but yeah, the no-MAF tune will not like it. Do you have headers?

That's what I figured, but the only thing that been changed in the last while was the tune and the IAT/MAF swap. I'm not ruling out a mechanical issue, but it's been driven so little it would be strange for it to pop up so suddenly and start right when I starting swapping the MAF and tunes around.

Not sure regarding fuel trims, what can I use to check that? No headers, still running stock ones. Just 3IM and K&N drop in.

Edit: I'll go start the car now and try to record if it does it, it's intermittent..

[tsk94]

Very minor roughness on cold start this morning. I took a video but it's almost undetectable on video. Minor shake in the car that went away after ~15 seconds.

I can upload the video, but from rewatching it I don't feel like it would be that helpful.