[matamua]

So I've done a fair amount of perusing the forum for information regarding the MHD flash in preparation for doing my 07 335i. From what I can gather, most people agree that you should be on at least a 10A battery charger and that you should use a recommended cable from a trusted source (bimmergeek).

Other than that and following the instructions on the pdf, is there anything I can do to maximize my success?

What about device selection? I'm an iPhone/Apple guy so android gear is not something I have hanging around and will have to buy. What's the best/cheapest phone/tablet that people have been successful with?

[Kevin39]

MHD Wifi adapter will soon have an iPhone compatible app

[iqraceworks]

MHD will test out your cable to make sure it communicates for free.....if it works, it works. I have a couple cheap eBay cables and they both work fine.

I would definitely hook up a charger the first time you flash it. For updates, or changes in your setting...it only takes a minute or two to flash the updates....don't worry about using a charger.

I've flashed my car several times and never had any issues.

[matamua]

Originally Posted by Kevin39

MHD Wifi adapter will soon have an iPhone compatible app

I've heard that several times, and that would be great. How soon is soon though?

[matamua]

Originally Posted by iqraceworks

MHD will test out your cable to make sure it communicates for free.....if it works, it works. I have a couple cheap eBay cables and they both work fine.

I would definitely hook up a charger the first time you flash it. For updates, or changes in your setting...it only takes a minute or two to flash the updates....don't worry about using a charger.

I've flashed my car several times and never had any issues.

What device did you use?

[hellokitty]

I use the following:

- CTEK AGM charger ($100)
- Fire HD 8 ($40)
- MHD WiFi dongle for E series ($70)

[iqraceworks]

Originally Posted by matamua

What device did you use?

I've used my Android phone, and also a Samsung tablet...both work great.

[nicky dj]

Best practices? Make sure your basic preventive maintenance is complete before running a tune i.e. putting more stress on the car. Your gaskets so no oil leaks OFHG and oil pan gasket, a walnut blast of your intake valves, and for sure spark plugs and/or coils. If you have not done you spark plugs in quite a while, get ready to experience your first misfires with a tune.

Btw the device I use is a cheap $99 Samsung tablet I bought at Best Buy.

[matamua]

Originally Posted by nicky dj

Best practices? Make sure your basic preventive maintenance is complete before running a tune i.e. putting more stress on the car. Your gaskets so no oil leaks OFHG and oil pan gasket, a walnut blast of your intake valves, and for sure spark plugs and/or coils. If you have not done you spark plugs in quite a while, get ready to experience your first misfires with a tune.

Btw the device I use is a cheap $99 Samsung tablet I bought at Best Buy.

Did plugs/coils about two weeks ago. In the shop right now getting OFHG, waterpump/tstat, walnut blast, VRSF intercooler and charge pipe. Planning to go to 1+ on 91 octane.

[nicky dj]

[jpauten]

Honestly, you don't need to spend very much money at all to flash your car. Instead of using a battery charger, I hooked up an (idling) car to my battery with jumper cables. A cheap Ebay cable works fine for flashing, I've flashed my car over 50 times with my 15$ Ebay cable and never had any issues.

[iqraceworks]

You can get a decent battery charger for under $50 on Amazon....even cheaper if you want. It's always a good thing to have around. Or even one of those jump boxes....they aren't too expensive.

[mweisdorfer]

Battery charger should be at least a 30amp with a maintenance function. The DME doesn't like surges and loss of battery power at all. I use a Dewalt 30amp Charger/ Maintainer

If you have used ISTA, you will note the battery should be at 14.6 when using this program. The same holds true with MHD.

- lights off
- radio off
- AC/ heater off
- dont open widows or doors at all.

[matamua]

Originally Posted by mweisdorfer

Battery charger should be at least a 30amp with a maintenance function. The DME doesn't like surges and loss of battery power at all. I use a Dewalt 30amp Charger/ Maintainer

If you have used ISTA, you will note the battery should be at 14.6 when using this program. The same holds true with MHD.

- lights off
- radio off
- AC/ heater off
- dont open widows or doors at all.

I've seen the "turn off all draws", but have not seen anyone using a 30A charger. What are you basing that off of?

[iqraceworks]

Hitting the battery with 30amps seems pretty extreme........I use a charger that outputs up to 12amps and I've never had any issue.

Also remember.....after the initial flash that takes 30-40 min, any other flashes only take a minute or two. I never use a charger when doing flashes now.....it's so fast, it's not worth hooking up a charger.