[RTPenland]

all piggybacks suck and pail in comparison to an actual flash which plays nice nice with your cars computer. Piggybacks are not tunes but rather trick boxes that hoax your car cars DME (computer, CPU, call it what you will) into making more power. So which trick box suck less? JB4 is the way to go.

But keep in mind trick box installed or removed after the fact can be found by the dealer so go with trick box because you can not unlock and have no other option and are desperate for a power bump not because its the best choice

[kfer]

Originally Posted by RTPenland

all piggybacks suck and pail in comparison to an actual flash which plays nice nice with your cars computer. Piggybacks are not tunes but rather trick boxes that hoax your car cars DME (computer, CPU, call it what you will) into making more power. So which trick box suck less? JB4 is the way to go.

But keep in mind trick box installed or removed after the fact can be found by the dealer so go with trick box because you can not unlock and have no other option and are desperate for a power bump not because its the best choice

I agree, but for the most of us the main problem is the chance, that the software update by BMW will remove the unlock. Other thing is, that imho there are a lot of people with leased cars, and they are concerned that a flash will do some problems at the returning.
That is the official statement of femto :

[1/3] Unlocking services info:

- **** DME needs to be sent to us for the initial unlock ****
After that:
- Remote Software Update / Over-The-Air updates must be disabled by yourself because any official update will remove our unlock completely.
- Flashing is available with use of our own femto obd flasher beta ONLY (Purchased separately. If you want other flashers to work with our unlock - you'll have to ask their developers to add this option)
- Only map (calibration/swfk) area is available for OBD writing (*)
- We can flash asw (software/swfl) area only while your DME is at our labs upon your request (*)
- Another option (petrol only!): MGFlasher / MHD or Bm3 app (purchased separately) - you can flash your car using their phone app after our unlock. Please explicitly indicate if you wish to use this option. Check 'unlocking options' (below) for details.
- Prices are: EUR 750/each ECU for the M series cars, EUR 600/each ECU for others
- V8 Engines are eqipped with 2xECUs
- Shipping cost NOT included

[mike@x-ph.com]

Originally Posted by JackMK

What piggyback do most people go with and seem most satisfied with?

The JB4 is the most popular piggyback.

[M340i Pride]

Originally Posted by JackMK

What piggyback do most people go with and seem most satisfied with?

Currently running jb4 on a stock car. Very satisfied. I am doing e30-e35 blend and running map 3 for the most part. Very noticeable power throughout the rpm range. I tried map 1 on 91 and it did have a moderate power gain. But as soon as I added some ethanol i felt more power and torque.

I have the catless dp waiting to be installed. Im sure that will bump up the power even more dramatically.

[mike@x-ph.com]

Originally Posted by M340i Pride

Currently running jb4 on a stock car. Very satisfied. I am doing e30-e35 blend and running map 3 for the most part. Very noticeable power throughout the rpm range. I tried map 1 on 91 and it did have a moderate power gain. But as soon as I added some ethanol i felt more power and torque.

I have the catless dp waiting to be installed. Im sure that will bump up the power even more dramatically.

[RTPenland]

Originally Posted by M340i Pride

Currently running jb4 on a stock car. Very satisfied. I am doing e30-e35 blend and running map 3 for the most part. Very noticeable power throughout the rpm range. I tried map 1 on 91 and it did have a moderate power gain. But as soon as I added some ethanol i felt more power and torque.

I have the catless dp waiting to be installed. Im sure that will bump up the power even more dramatically.

Would you say your power delivery is as linear as oem with your setup? Does it drive and shift just like stock but with more power? Im happy you are in Cali and can help with this input

Most of what I have read over the years says that while there may be some added punch for sure with a piggyback the characteristics of the car change. Not necessarily a bad thing just curious. Is it oem smooth? Thank you

[M340i Pride]

Originally Posted by RTPenland

Would you say your power delivery is as linear as oem with your setup? Does it drive and shift just like stock but with more power? Im happy you are in Cali and can help with this input

Most of what I have read over the years says that while there may be some added punch for sure with a piggyback the characteristics of the car change. Not necessarily a bad thing just curious. Is it oem smooth? Thank you

Thank you. I am sure its not as smooth as stock. The power comes on with bit of a kick from say, 2k rpm. If i am getting on it, then it feels pretty smooth.

And higher map definitely feels more gritty compared to stock. Its a trade off lol. Im sure that’s why people eventually gravitate towards true tune. I am sure i will in few years lol.

[RTPenland]

Originally Posted by M340i Pride

Thank you. I am sure its not as smooth as stock. The power comes on with bit of a kick from say, 2k rpm. If i am getting on it, then it feels pretty smooth.

And higher map definitely feels more gritty compared to stock. Its a trade off lol. Im sure that’s why people eventually gravitate towards true tune. I am sure i will in few years lol.

No I think that's fine and honest, piggybacks offer a compromise, more power at the expensive of some drivability and I agree that if it is an oem like driving experience that you are after only a flash will deliver that. But some cant flash so we work with what we have for sure. I think if you are after maximizing your car and you can (some cant) flash vs piggyback the flash is the way to go i remember when piggybacks weren't detectable but now that all things are equal no reason not to flash more healthy for engine and a like stock experience with more power to access

[Danny6799]

JB4 for sure take it from someone who has both. Racechip is a pile of crap and barley works but JB4 adds a good 70hp I know because I dynod it

[xinzeli123]

Originally Posted by vitooo

I have the Carbahn (Steve Dinan’s new company) piggyback and loved it. Conservative power games, but especially noticeable with 100 octane (which it uses a specific map for). I used to worry about warranty and purchased that too (factory matching warranty). I’ll be parting ways with it soon and will let it go for a great price if interested.

How much?

[mike@x-ph.com]

Originally Posted by RTPenland

Would you say your power delivery is as linear as oem with your setup? Does it drive and shift just like stock but with more power? Im happy you are in Cali and can help with this input

Most of what I have read over the years says that while there may be some added punch for sure with a piggyback the characteristics of the car change. Not necessarily a bad thing just curious. Is it oem smooth? Thank you

The jb4 is not active before 2500 RPM, so it drives like stock.

Once you press on the gas pedal, it hits a more substantial than stock because of the extra torque its adds.

The power delivery is the same as you are adding the same amount of boost through the entire RPM range keeping the same HP curve just higher.

[Rw-M240]

Map 3 is a lot of boost for the new b58tu. It’s already running a lot higher boost levels than the gen 1 b58 and the jb4 was designed for that engine. If you install the downpipe you definitely can’t be running map 3 unless you want to overboost way too much. For example on map 3 it will probably make somewhere around 22-23psi which is pushing this tiny turbo way to far without proper fueling from a ecu tune. Just head ups running map 3 way better off on map 4 since 20 psi seems to be the sweet spot on these stock turbos.

[mike@x-ph.com]

Originally Posted by Rw-M240

Map 3 is a lot of boost for the new b58tu. It’s already running a lot higher boost levels than the gen 1 b58 and the jb4 was designed for that engine. If you install the downpipe you definitely can’t be running map 3 unless you want to overboost way too much. For example on map 3 it will probably make somewhere around 22-23psi which is pushing this tiny turbo way to far without proper fueling from a ecu tune. Just head ups running map 3 way better off on map 4 since 20 psi seems to be the sweet spot on these stock turbos.

I always recommend starting with an absolute map on this platform, datalogging, and then moving to more aggressive additive maps.

[Trevski220]

Originally Posted by Danny6799

JB4 for sure take it from someone who has both. Racechip is a pile of crap and barley works but JB4 adds a good 70hp I know because I dynod it

If your racechip was that bad I’d suggest it was faulty or installed incorrectly , I’ve run my Racechip for a year now with great results and gains over stock with numerous dragy runs back to back with chip on and off.

[Danny6799]

Originally Posted by Trevski220

If your racechip was that bad I’d suggest it was faulty or installed incorrectly , I’ve run my Racechip for a year now with great results and gains over stock with numerous dragy runs back to back with chip on and off.

It wasn’t bad because I sent it out to Germany and they sent me a new one. It definitely wasn’t installed correctly either the power gains were just very slight.

[Panscan340]

Originally Posted by Trevski220

If your racechip was that bad I’d suggest it was faulty or installed incorrectly , I’ve run my Racechip for a year now with great results and gains over stock with numerous dragy runs back to back with chip on and off.

Just curious, what times did you get?

[Trevski220]

I haven’t run many 1/4 miles as I’ve nowhere to do them here in UK but 11.64 is the best I had on the road.

I’ve done the following comparisons

Chip off. Chip on
0-100mph. 9.52 secs. 8.83 secs
62-124mph. 10.76 secs. 8.95 secs
30-100mph. 8.12 secs. 6.97 secs
30-80mph. 4.96 secs. 4.35 secs

I’m impressed with it

[Jens Mariager]

Originally Posted by Trevski220

I haven’t run many 1/4 miles as I’ve nowhere to do them here in UK but 11.64 is the best I had on the road.

I’ve done the following comparisons

Chip off. Chip on
0-100mph. 9.52 secs. 8.83 secs
62-124mph. 10.76 secs. 8.95 secs
30-100mph. 8.12 secs. 6.97 secs
30-80mph. 4.96 secs. 4.35 secs

I’m impressed with it

Hi just curious what setting are you running I read some one mention running more than settings 5 are dangerous 😰or was that only JB4?

[Trevski220]

Originally Posted by Jens Mariager

Hi just curious what setting are you running I read some one mention running more than settings 5 are dangerous 😰or was that only JB4?

I use it on number 6

[MegaMalding]

“ps- if it were me I would piggyback and then wait for a state side unlock - while the flash tunes deliver an experience well beyond what a trick box can - the thought of having to send my DME back overseas when it gets relocked by the dealer would be a real bummer - just my 2-cents.”

It will take years before other companies figure out how to bench unlock the 2021+ G chassis BMWs. FEMTO already said several times they will not repeat the mistake they made with the F chassis bench unlocks. Reason why the F chassis is so easily tunable is because they told a few people how to and those people sold that information and FEMTO lost big money because of it.

As of now 5 people know the SecureBMW Code to unlock post June 2021 G chassis DMEs. I’m sure given enough time Kies motorsports will figure it out but it could be well into the H chassis models which isn’t expected to start until 2028.

The Price to send your DME out to FEMTO keeps falling, right now your looking at a cost of $1,800 and a 8-14 day turnaround time which is very reasonable, especially for B58 and S58 vehicles.

[mike@x-ph.com]

Originally Posted by Jens Mariager

Hi just curious what setting are you running I read some one mention running more than settings 5 are dangerous 😰or was that only JB4?

The map on its own is not dangerous, same with the Jb4. But you need to run the map recommended for your mods and fuel.

If you are running E85, then map 7 is fine. If you are running lower quality fuel like 91, map 5 is the most I would use on daily driving.

[merv1]

So I've been running Map 5 and a Map 6 (from Terry) with roughly an E30 mixture for the past couple of months and couple thousand miles and the car has been great. Drives like stock when you're not flooring it but when you need the power and put your foot down, the torque is amazing. Using a Dragy, the best time I've gotten is 0-60 in 3.36s and a quarter mile of 11.54 @ 118.02mph. The car is completely stock other than the JB4. No other modifications. Waiting for a stateside DME unlock as well though.