Yep I use the MHD adapter for XHP. For traction and DSC off it defaults to the fastest settings 👍

 

Yep I use the MHD adapter for XHP. For traction and DSC off it defaults to the fastest settings 👍

Can you just download the software and map it or does defined coding have to do it remotely?

How much is it in total to flash (excluding the wifi adaptor i bought)

And does it make a big difference?

 

I don't know who defined coding are but once you have the adaptor - which I think was about £70 the map pack 1-4 was about £250 if I remember right. The app will tell you I'm sure.
Once you've bought the software you will have full access to all the adjustability and options available. It's very easy to use as each option has a paragraph of explanation attached to it.

I love it, eco pro and comfort are very much untouched but in all other settings the gear changes are very different. It reminds me of my old M3's DCT changes.

 

I don't know who defined coding are but once you have the adaptor - which I think was about £70 the map pack 1-4 was about £250 if I remember right. The app will tell you I'm sure.
Once you've bought the software you will have full access to all the adjustability and options available. It's very easy to use as each option has a paragraph of explanation attached to it.

I love it, eco pro and comfort are very much untouched but in all other settings the gear changes are very different. It reminds me of my old M3's DCT changes.

Sweet.

So really if i decide to go mhd stage 1 and xhp im looking at close to 800 quid, quite a lot of money shame mhd dont offer a trans flash as part of the package.

Did you use a battery charger for your remap via wifi adaptor?

 

It is quite a bit of money but the difference will be significant. I think Bm3 offer a transmission flash but I don't think it's anywhere near as involved as what you get with XHP.

The software also increases line pressure which as I understand I'm my layman's way, reduces the chances of slip in the clutch packs preserving your auto box once you increase engine power.
I think this is all that Bm3 offers but I may be wrong.

I don't think I did hook it up for XHP as it was so quick. About 5 or 6 minutes from memory. Subsequent flashes take about 2 mins now.
The initial flash with MHD was the big one which took about 45 mins as it has to unlock the DME first time round. For that I did have the car charging. Now MHD flashes take about 5 minutes so I tend not to worry.

 

The initial flash with MHD was the big one which took about 45 mins as it has to unlock the DME first time round. For that I did have the car charging. Now MHD flashes take about 5 minutes so I tend not to worry.

45 minutes with the wifi adapter? That's a cable flash time.

 

The initial flash with MHD was the big one which took about 45 mins as it has to unlock the DME first time round. For that I did have the car charging. Now MHD flashes take about 5 minutes so I tend not to worry.

45 minutes with the wifi adapter? That's a cable flash time.

Yeh i was going to say that must be cable.

 

Sorry, yes first time was cable. No experience of the first flash time with the WiFi adapter.

 

I did my first time flash for MHD stage 1 with the WiFi adapter (orange one) and didn't bother with the charging, had no issues at all. Took about 7, maybe 8 minutes max.

 

That is a significant difference to cable.

 

Yep I use the MHD adapter for XHP. For traction and DSC off it defaults to the fastest settings 👍

Can you just download the software and map it or does defined coding have to do it remotely?

How much is it in total to flash (excluding the wifi adaptor i bought)

And does it make a big difference?

I looked into this a couple of months back and briefly spoke with Kyle @ defined coding...

I decided I'd save some money until I can do it all in 1 hit.

I'm going down the route of handling for now, and make sure you're rolling on either MPSS or MPS4s.

I will eventually aim for sports cat, then go colder plugs along with stage 2 BM3 and xHP stage 3.

Apparently you should do the gearbox map before BM3/MHD so you can notice it more (get used to it for a few months then go onto up the power).

But I'm skipping stage 1 and going straight for 2 (I just want to hit around 440bhp and leave it)...famous last words lol

 

Yep I use the MHD adapter for XHP. For traction and DSC off it defaults to the fastest settings 👍

Can you just download the software and map it or does defined coding have to do it remotely?

How much is it in total to flash (excluding the wifi adaptor i bought)

And does it make a big difference?

I looked into this a couple of months back and briefly spoke with Kyle @ defined coding...

I decided I'd save some money until I can do it all in 1 hit.

I'm going down the route of handling for now, and make sure you're rolling on either MPSS or MPS4s.

I will eventually aim for sports cat, then go colder plugs along with stage 2 BM3 and xHP stage 3.

Apparently you should do the gearbox map before BM3/MHD so you can notice it more (get used to it for a few months then go onto up the power).

But I'm skipping stage 1 and going straight for 2 (I just want to hit around 440bhp and leave it)...famous last words lol

I dont get the whole 'do it first so you notice it' malarky.

If you cant notice it then surely its not worth doing 😂😂😂😂

 

It's more to do with the fact that you should notice the difference in stages.

If you do it simultaneously, you'll naturally experience a difference of power but this may affect how much of a difference the xHP makes.

I guess the bottom line is, when mapping the ZF8 but keeping the power the same - you truly see the difference.

If you up the power at the same time, it may not have as much of a significant impact.

 

I'm also considering the xHP flash. Actually, my plan is to:

- do xHP first, enjoy it for a while and then
- BM3 Stage 1

I was wondering if these are mods that I need to report to my insurer? The xHP seems like an odd one as it's just the gear performance we're changing, not any changes to the car's power per-se.

 

All mods should be declared. Some may not increase your premium but not declaring them could have drastic consequences if the worst happened. I even told my insurer that I'd changed my front grill from chrome to black. That way there is no argument if I had to make a claim.
Insurers do not like to pay out if they can avoid it. Their principal objective is to make money, not look after us!

Sent from my iPhone using Tapatalk

 

Makes sense. What do folks usually do - ask first or do the mod(s) and then tell them?

 

worth asking first in case they won't cover mods of any kind, or try and pull your pants down. You can then shop around insurers and declare mods within the quote request.

 

Definitely do BM3/MHD,etc first.

I installed xHP and was really struggling to work out what it actually did. Admittedly I only drive in full manual mode with paddles. Gear changes were slightly sharper but only noticeable if you back to back drive the car, and even then not every change is sharper.

 

That's interesting - I had planned to do the xHP first just to get the better shifts going with standard map, drive it for a bit and then do BM3 to appreciate the change. Is the xHP actually worth it...?

 

I'd pay the xHP licence cost again just to fix pulling onto roundabouts without the delay!

Well worth it, in my opinion. I came from DSG into the M140i and it really felt like a slushmatic at first. Did xHP after a couple of weeks and it now feels on par with DSG.

 

If you do xhp first, you will get to see if it makes a noticeable difference to you in the mode/s you drive in. If you always switch to one particular combination of modes to drive the car, there is a chance that the xhp changes may not be very apparent simply because they don't happen to change much for that specific set of modes. It should also, assuming the xhp claims and the logic behind them holds, reduce friction wear on the clutches of the box.

If you choose to map the engine first, you might cause accelerated friction wear on the clutches of the map reports underestimated torque figures to the transmission control unit to prevent torque limiting by box… or simply get your car held back by torque limiting from the tcu if the ECU sends accurate estimates of the torque level.

 

If you do xhp first, you will get to see if it makes a noticeable difference to you in the mode/s you drive in. If you always switch to one particular combination of modes to drive the car, there is a chance that the xhp changes may not be very apparent simply because they don't happen to change much for that specific set of modes. It should also, assuming the xhp claims and the logic behind them holds, reduce friction wear on the clutches of the box.

I tend to go into Sport mode pretty quickly and I believe xHP delivers most of it's changes in sport/sport+.

If you choose to map the engine first, you might cause accelerated friction wear on the clutches of the map reports underestimated torque figures to the transmission control unit to prevent torque limiting by box… or simply get your car held back by torque limiting from the tcu if the ECU sends accurate estimates of the torque level.

That's a good point - you've got me back to my original plan. xHP, then BM3.

 

I ended up not bothering with XHP.

It just sounds like it gives you hard shifts, sports gearbox mode already does that to me and i think if it was any harder it would feel like the car was going to break.

Also havent noticed any issues running stage 1 without a gearbox map, it gives me full power anytime i want it.

Yes a remap will wear the engine and gearbox more, but in my opinion, 'higher clamping force' is just as likely to wear the gearbox, its operating out of standard settings, i dont get how they can tout it as protecting your gearbox when its clamping harder.

 

I thought the shift was less aggressive (hard) because they shifted quicker....

 

The higher clamping force stops the clutch from slipping