XHP Trans Flash -- whats the consensus? POLL

SoCalCarGuy · 06-18-2019, 12:52 PM

Title says it all!

Also wondering if anybody has any dragy or drag strip results to show actual improvement. Independent testing only!

cheers,

Kraftwerk · 06-18-2019, 12:55 PM

BM3 TCU flash is now open beta. So it will be interesting to see a comparison.

SoCalCarGuy · 06-18-2019, 01:29 PM

Quote:

Originally Posted by Kraftwerk

BM3 TCU flash is now open beta. So it will be interesting to see a comparison.

Bm3 is only for n55, not b58

Kraftwerk · 06-18-2019, 02:39 PM

Quote:

Originally Posted by SoCalCarGuy

Quote:

Originally Posted by Kraftwerk

BM3 TCU flash is now open beta. So it will be interesting to see a comparison.

Bm3 is only for n55, not b58

Your title didn't specify the engine. But yes I'm referencing n55.

Brett530 · 06-18-2019, 03:00 PM

I flashed xHP to stage 2 last Friday. My tune and WMI where pushing me over the stock torque limit and causing heavy throttle acceleration problems. The only options are to stay below the torque limit or flash the tranny. So really, there is only one option. :-)

Stage two so far has been smooth and still nice as a daily driver. I like the gear display D1, D2, D3 etc. as the tranny shifts. I have not pushed it too much yet, but so far it seems the throttle closures are gone.

SoCalCarGuy · 06-18-2019, 03:38 PM

Quote:

Originally Posted by Kraftwerk

Your title didn't specify the engine. But yes I'm referencing n55.

looking for opinions regarding the xhp flash in general; not specific to n55 or b58.

I would love it if bm3 would develop and sell a trans flash as well. I'd much rather pay them $50-100 for another map from BM3 than to have a 2nd company tuning. BM3 (Halim/Dzenan?) 20k users x $50 - 100 = lots of Mclaren money for you.

Kraftwerk · 06-18-2019, 03:50 PM

Quote:

Originally Posted by SoCalCarGuy

looking for opinions regarding the xhp flash in general; not specific to n55 or b58.

I would love it if bm3 would develop and sell a trans flash as well. I'd much rather pay them $50-100 for another map from BM3 than to have a 2nd company tuning. BM3 (Halim/Dzenan?) 20k users x $50 - 100 = lots of Mclaren money for you.

They're not charging extra for the TCU flash on the N55 so I'm sure if they come out with one they will do the same for the B58.

SoCalCarGuy · 06-18-2019, 05:54 PM

Quote:

Originally Posted by Brett530

I flashed xHP to stage 2 last Friday. My tune and WMI where pushing me over the stock torque limit and causing heavy throttle acceleration problems. The only options are to stay below the torque limit or flash the tranny. So really, there is only one option. :-)

Stage two so far has been smooth and still nice as a daily driver. I like the gear display D1, D2, D3 etc. as the tranny shifts. I have not pushed it too much yet, but so far it seems the throttle closures are gone.

does xhp force you to buy all 3 maps? I really only want S2 for all around daily use.

Brett530 · 06-18-2019, 11:12 PM

Quote:

Originally Posted by SoCalCarGuy

does xhp force you to buy all 3 maps? I really only want S2 for all around daily use.

It seems they come as a package deal. I did not see a way to buy a single map. I probably would have just bought stage 2, but I may try stage 3 down the road.

Kraftwerk · 06-18-2019, 11:47 PM

Quote:

Originally Posted by SoCalCarGuy

Quote:

Originally Posted by Brett530

I flashed xHP to stage 2 last Friday. My tune and WMI where pushing me over the stock torque limit and causing heavy throttle acceleration problems. The only options are to stay below the torque limit or flash the tranny. So really, there is only one option. :-)

Stage two so far has been smooth and still nice as a daily driver. I like the gear display D1, D2, D3 etc. as the tranny shifts. I have not pushed it too much yet, but so far it seems the throttle closures are gone.

does xhp force you to buy all 3 maps? I really only want S2 for all around daily use.

Unfortunately yes. They offer individual maps only for the 6 speed.

I flashed stage 3 for daily driving and really don't find it uncomfortable at all. I would have only bought s3 if it were an option.

Moveitsmikey · 06-19-2019, 10:34 AM

I always thought the HP8 shifted quick enough lol

EvenKeel · 06-20-2019, 07:21 AM

There should be another category added:

"I would love to try it; but I don't have the balls to risk a $7K transmission".

.......I guarantee you; it'll receive the highest no. of votes.

SoCalCarGuy · 06-20-2019, 09:24 AM

Quote:

Originally Posted by EvenKeel

There should be another category added:

"I would love to try it; but I don't have the balls to risk a $7K transmission".

.......I guarantee you; it'll receive the highest no. of votes.

Quote:

Originally Posted by EvenKeel

There should be another category added:

"I would love to try it; but I don't have the balls to risk a $7K transmission".

.......I guarantee you; it'll receive the highest no. of votes.

I don't think any of these people would be here if they were scared of the cost of breaking something by modifying their car. Many of us received our cars and put tunes on them within the first few thousand miles, putting the 10 K plus engine at risk. It's the risk were all willing to take, and people like to modify their cars.

XutvJet · 06-20-2019, 11:06 AM

Quote:

Originally Posted by EvenKeel

There should be another category added:

"I would love to try it; but I don't have the balls to risk a $7K transmission".

.......I guarantee you; it'll receive the highest no. of votes.

Agreed.

Why is there a torque limiter on the 8at? No one knows for sure, but BMW saw fit to do it and now you have a tune that removes it and guys are sending 100 ft/lbs more through the tranny. Team that with the facts that most guys in here have big loans or leases and not enough money in a rainy day fund to deal with something like a major trans failure. Good luck!

SoCalCarGuy · 06-20-2019, 11:10 AM

Quote:

Originally Posted by XutvJet

Agreed.

Why is there a torque limiter on the 8at? No one knows for sure, but BMW saw fit to do it and now you have a tune that removes it and guys are sending 100 ft/lbs more through the tranny. Team that with the facts that most guys in here have big loans or leases and not enough money in a rainy day fund to deal with something like a major trans failure. Good luck!

theses cars are over engineered, not under!

This is why you don't hear about a bunch of trans and engine failures on the forums on our LIGHTLY modified cars.

Now if you start getting into 200+ hp/tq over stock, then you might consider upgrading other parts.

SoCalCarGuy · 06-20-2019, 10:31 PM

Does anybody have any before and after dragy/strip results from the trans flash?

e46m3to335i · 06-21-2019, 09:22 AM

Quote:

Originally Posted by SoCalCarGuy

Does anybody have any before and after dragy/strip results from the trans flash?

This is what I want to see before I make the switch. Actual proof it's faster. I want to see someone do a stock 0-60 and 1/4 mile runs then load the xHP and conduct the same runs within the same conditions and locations.

I had the GTS TCU flash on my e90 M3 DCT car back in the day and it would snap your neck on upshifts. Was it faster at the track in terms of 0-60 and 1/4 mile times. Barely, if I remember correctly it shaved a 1/10 off the 1/4 mile and even less on the 0-60.

Moral of the story. Just because it feels like the car is shifting faster doesn't mean the car is actually faster.....

-Nick

Brett530 · 06-21-2019, 12:18 PM

The faster shifts are not what the flash is really for. It is a nice side benefit. My stage 2 tune and meth injection caused throttle closures since the torque limits in the stock transmission programming were stopping the ECU from getting the power it was requesting. There is no way to get more power from the car without removing the stock torque limits.

Before xHP, heavy throttle acceleration was jerky and unquestionably slower. After the flash, with the same meth settings, it accelerates smoothly up to redline.

It doesn't make much sense to flash the transmission if you are not pushing enough power to be hitting the stock torque limits.

If you are comparing (a future) BM3 TCU flash with xHP, I can't see there being any real difference in trap times. Removed torque limit would be the same.

Enabled · 06-21-2019, 02:15 PM

The torque limits, especially in 3rd and 6th gear are there for a very important reason...

Wires · 06-22-2019, 06:57 PM

Quote:

Originally Posted by XutvJet

Agreed.

Why is there a torque limiter on the 8at? No one knows for sure, but BMW saw fit to do it and now you have a tune that removes it and guys are sending 100 ft/lbs more through the tranny. Team that with the facts that most guys in here have big loans or leases and not enough money in a rainy day fund to deal with something like a major trans failure. Good luck!

Because the input shaft has a specified nominal torque limit before the sprag clutch blows.

I believe the 340 uses the ZF500 (500nm / 370ft lb) transmission. As much as I would like the faster shifts and less torque intervention (and I have the BM3 S1, going to S2 + DP soon), I am concerned about the transmission.

Now, how much of a safety factor does ZF design for? Obviously the ZF8500 won't blow at 500 nm; that's the "continuous torque" number.

SilkySmoooth · 06-22-2019, 08:50 PM

Quote:

Originally Posted by Enabled

The torque limits, especially in 3rd and 6th gear are there for a very important reason...

Enlighten us......

Dont just make a statement, explain it please.

perryo91 · 06-22-2019, 11:05 PM

Quote:

Originally Posted by Enabled

The torque limits, especially in 3rd and 6th gear are there for a very important reason...

Quote:

Originally Posted by SilkySmoooth

Enlighten us......

Dont just make a statement, explain it please.

Lol, its a very important reason okay...

View Poll Results: Is the XHP tune worth the price of admission?
I have it, yes it is	16	40.00%
I have it, no it isn't	1	2.50%
I don't have it, but I want it	9	22.50%
I don't want it	14	35.00%
Voters: 40. You may not vote on this poll

06-18-2019, 12:52 PM	#1
SoCalCarGuy First Lieutenant 132 Rep 345 Posts Drives: 2019 440ix cpe + 2018 x4 m40i Join Date: Mar 2019 Location: LA, CA iTrader: (0)	XHP Trans Flash -- whats the consensus? POLL Title says it all! Also wondering if anybody has any dragy or drag strip results to show actual improvement. Independent testing only! cheers,
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06-18-2019, 12:55 PM	#2
Kraftwerk Private First Class 30 Rep 101 Posts Drives: 2015 335i M Sport Join Date: Jun 2018 Location: Los Angeles iTrader: (0)	BM3 TCU flash is now open beta. So it will be interesting to see a comparison. __________________ 2015 335i ///M-Sport 8AT \| M Performance Exhaust/Brakes/Suspension \| BMS CP \| BM3 Stage 2 \| VRSF FMIC \| AR Design DP \| AFE Filter \| RES Delete \| BavAuto Coils \| P3 Gauge \| xHP Stage 3 \|
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06-18-2019, 03:00 PM	#5
Brett530 Second Lieutenant 208 Rep 245 Posts Drives: '17 F30 340i Join Date: Apr 2016 Location: Utah iTrader: (0)	I flashed xHP to stage 2 last Friday. My tune and WMI where pushing me over the stock torque limit and causing heavy throttle acceleration problems. The only options are to stay below the torque limit or flash the tranny. So really, there is only one option. :-) Stage two so far has been smooth and still nice as a daily driver. I like the gear display D1, D2, D3 etc. as the tranny shifts. I have not pushed it too much yet, but so far it seems the throttle closures are gone. __________________ 2017 F30 340i RWD // MG Flasher // xHP // CG DS-1 // ZTR ZMP ZCW ZLP
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06-19-2019, 10:34 AM	#11
Moveitsmikey Private First Class 61 Rep 126 Posts Drives: 2013 BMW 135i M-SPORT Join Date: Jan 2019 Location: Arizona iTrader: (0)	I always thought the HP8 shifted quick enough lol
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06-20-2019, 07:21 AM	#12
EvenKeel Captain 418 Rep 886 Posts Drives: Sedan Join Date: Aug 2012 Location: USA iTrader: (0)	There should be another category added: "I would love to try it; but I don't have the balls to risk a $7K transmission". .......I guarantee you; it'll receive the highest no. of votes.
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06-20-2019, 10:31 PM	#16
SoCalCarGuy First Lieutenant 132 Rep 345 Posts Drives: 2019 440ix cpe + 2018 x4 m40i Join Date: Mar 2019 Location: LA, CA iTrader: (0)	Does anybody have any before and after dragy/strip results from the trans flash?
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06-21-2019, 12:18 PM	#18
Brett530 Second Lieutenant 208 Rep 245 Posts Drives: '17 F30 340i Join Date: Apr 2016 Location: Utah iTrader: (0)	The faster shifts are not what the flash is really for. It is a nice side benefit. My stage 2 tune and meth injection caused throttle closures since the torque limits in the stock transmission programming were stopping the ECU from getting the power it was requesting. There is no way to get more power from the car without removing the stock torque limits. Before xHP, heavy throttle acceleration was jerky and unquestionably slower. After the flash, with the same meth settings, it accelerates smoothly up to redline. It doesn't make much sense to flash the transmission if you are not pushing enough power to be hitting the stock torque limits. If you are comparing (a future) BM3 TCU flash with xHP, I can't see there being any real difference in trap times. Removed torque limit would be the same. __________________ 2017 F30 340i RWD // MG Flasher // xHP // CG DS-1 // ZTR ZMP ZCW ZLP Last edited by Brett530; 06-21-2019 at 12:25 PM..
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06-21-2019, 02:15 PM	#19
Enabled Lieutenant Colonel 1406 Rep 1,797 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	The torque limits, especially in 3rd and 6th gear are there for a very important reason... __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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