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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications Xhd trans tune?
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      02-16-2019, 03:33 PM   #89
ziekxq
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I was wondering if I need to selec 8AT 3rd and 6th fix if I have this tune?
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      02-16-2019, 04:40 PM   #90
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Quote:
Originally Posted by trialmountain View Post
Does the XHP tune keep the revs in the sweet spot of the powerband? For example most 1/4 mile guys short shift short around 63-6800 as the stock turbo drops off and is less efficient up top. I don't see the need to run to redline for 90% of my driving unless I'm trying to hold it in gear through a corner and then I would be in M mode and a flash wouldn't assist me there.
This week I flashed Stage 2 initially and kept it for less than a couple days. Three days ago I switched to Stage 3.

After flashing Stage 3 and doing the 50-mile break-in, I briefly went into S/Sport+ mode. At that time I was already going around 45 mph before switching into S/Sport+ mode. And from quick glances to my cluster I remember the gear downshifting, the RPMs staying above 4000 RPM, and the eventual upshift happening more quickly when I started to accelerate. I think I remember my uphifts happening very close to or at redline. In any event, my car felt like a different machine. I only stayed in S/Sport+ for less than a minute though.

In Stage 3 with S/Sport+ mode engaged, the engine was of course louder (I normally keep my RPMs around 2500 so for me anything above 2500 is going to make my engine seem louder).

S/Sport+ in Stage 3 makes my car's acceleration *feel* faster than I ever imagined it could feel. But I won't be using that mode too often in Stage 3 because I don't want to wear out my transmission and engine any sooner. For me, D/Comfort is more than enough for regular driving, especially on highways. And S/Sport for those few times I need a quicker burst of acceleration.

As side note, I don't remember the RPMs behaving in Stage 2 S/Sport+, as they do in Stage 3 S/Sport+.

EDIT: I do have the BM3 Stage-1 91 Octane flash so my experience might be different from a car that doesn't have a DME flash.

Last edited by _GW_; 02-16-2019 at 04:45 PM. Reason: Additional info
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      02-16-2019, 08:44 PM   #91
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I started reading the manual, and it looks like for the 6spd, you can adjust the shift points in each gear individually, i.e. there are 6 sliders, each with a + or -, it allows you to adjust the shift rpm in each gear. It is in percentage, so if it shifts into 6th gear at 40 and you add 10%, it would shift at 44 under that same condition. I'm wondering when they will add this function to the 8HP versions.
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      02-17-2019, 01:45 PM   #92
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It's worth noting that the xHP documentation for the 8 speed says explicitly that Stage 3 is just like Stage 2 except that it keeps the revs high for "roll racing" and "track". Probably only in Sport or Sport+.

So, if you don't like that, just use Stage 2 and it should be otherwise identical.
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      02-17-2019, 01:54 PM   #93
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Quote:
Originally Posted by Surly73 View Post
It's worth noting that the xHP documentation for the 8 speed says explicitly that Stage 3 is just like Stage 2 except that it keeps the revs high for "roll racing" and "track". Probably only in Sport or Sport+.

So, if you don't like that, just use Stage 2 and it should be otherwise identical.
I think that's exactly right. I don't have sport+ and messaged them about whether stage 3 does anything for me and they said no, stage 2 and 3 are identical if you don't have sport+
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      02-17-2019, 03:39 PM   #94
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Quote:
Originally Posted by burro_blasta View Post
I think that's exactly right. I don't have sport+ and messaged them about whether stage 3 does anything for me and they said no, stage 2 and 3 are identical if you don't have sport+
If you have dsc button and you press and hold it for long. It turns into sport oriented chassis and rpms do act differently. If you are cruising in that mode and have your lever to the left to be in S mode than rpm would jump to 5k and stay there.

I learned this yesterday when my logging required to turn off dsc completely.

Last edited by ziekxq; 02-17-2019 at 03:45 PM.
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      02-17-2019, 10:29 PM   #95
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Wow looking forward to trying that
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      02-17-2019, 10:31 PM   #96
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I had done that before I had xhp, will be cool if now that tricks xhp into doing sport+ race mode
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      Yesterday, 02:42 PM   #97
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Quote:
Originally Posted by burro_blasta View Post
I had done that before I had xhp, will be cool if now that tricks xhp into doing sport+ race mode
At least from my experience when dsc is on than in s mode the rpm arr around 3k.

If dsc completely off than rpm jumps to 5k, and I tried this multiple times to verify.
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      Yesterday, 05:06 PM   #98
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Great find! That put my car in race mode.

My only issue now is that it seems to go out of sport mode when DSC OFF...xhp was supposed to fix that but it doesn't seem to
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      Yesterday, 05:45 PM   #99
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Quote:
Originally Posted by burro_blasta View Post
Great find! That put my car in race mode.

My only issue now is that it seems to go out of sport mode when DSC OFF...xhp was supposed to fix that but it doesn't seem to
I think for our cars, lever to the left aka S mode is sports mode and s mode + dsc completely off is the sport+ mode.
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      Yesterday, 09:18 PM   #100
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New update v1.1 is available. Shifts much better. Shifting in D is stretched to shift a little higher in rpm while S is tamed a tiny bit. I like it better
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      Yesterday, 11:10 PM   #101
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Quote:
Originally Posted by HammerHead5'r View Post
New update v1.1 is available. Shifts much better. Shifting in D is stretched to shift a little higher in rpm while S is tamed a tiny bit. I like it better
I got to try it out.
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