[bmw22915]

Originally Posted by msk340i

Why?
Thanks

PTF designed BM3 to be run independently. I'm not saying you can't, but if you're looking for more power, why not go stage 2? You're risking damage to your drivetrain as the JB4 is trying to raise the boost pressure in conjunction with the tune. I'm not the most knowledgeable about this, but just my 2 cents and my personal opinion.

[G.Newt]

Update: PTF sent me a test Stage 1 91 octane test map early this morning and I'm still getting throttle closures. Went to Stage 2 and everything is much better and smoother.

They asked me to do a 3rd gear pull, I'll probably flash tomorrow after work for them and log.

[Araemo]

Originally Posted by j1980mac

Hook up your ODB cable to BM3 app, make sure your vehicle can "be seen" by the software and start the log in the settings.

To my understanding, you'll have to do a few higher gear pulls. Like all of 3rd, all of 4th, and if you're brave enough all of 5th, or just do it on a dyno.

Originally Posted by G.Newt

Update: PTF sent me a test Stage 1 91 octane test map early this morning and I'm still getting throttle closures. Went to Stage 2 and everything is much better and smoother.

They asked me to do a 3rd gear pull, I'll probably flash tomorrow after work for them and log.

Hah! A 3rd gear pull is well into felony territory. 6500 RPM in 3rd is 98 Mph.

The best I could realistically do is a 2nd gear pull.

[j1980mac]

Originally Posted by Araemo

Hah! A 3rd gear pull is well into felony territory. 6500 RPM in 3rd is 98 Mph.

The best I could realistically do is a 2nd gear pull.

I know right!

[MTWO]

Originally Posted by bmw22915

PTF designed BM3 to be run independently. I'm not saying you can't, but if you're looking for more power, why not go stage 2? You're risking damage to your drivetrain as the JB4 is trying to raise the boost pressure in conjunction with the tune. I'm not the most knowledgeable about this, but just my 2 cents and my personal opinion.

I see zero point running JB4 after you go flash unless you like spray meth maybe but that’s it. Even then most guys I know use something that doesn’t connect to the car that then blocks BM3 logging like aem or snow performance meth. There is another called Torqbyte that people are running but I haven’t tried or seen it on a car in person yet.

[msk340i]

Originally Posted by bmw22915

PTF designed BM3 to be run independently. I'm not saying you can't, but if you're looking for more power, why not go stage 2? You're risking damage to your drivetrain as the JB4 is trying to raise the boost pressure in conjunction with the tune. I'm not the most knowledgeable about this, but just my 2 cents and my personal opinion.

I asked PTF and they said it's fine to stack it. I'm using map 1 only so I believe I should be fine. I'm not looking for big power and stage 2 requires a downpipe which I'm not ready for yet. Thank you though

[EricVR4]

Originally Posted by Araemo

Hah! A 3rd gear pull is well into felony territory. 6500 RPM in 3rd is 98 Mph.

The best I could realistically do is a 2nd gear pull.

This is my problem as well. I'd love to log a few runs for my own sanity and so I can send some stuff to PTF but I live in the city in Houston and HPD is EVERYWHERE. There are zero areas for me to open the car up on.

My best bet is to find a dyno somewhere so I might go that route eventually because I'd like to know what kind of power the car is making too.

[bmw22915]

Originally Posted by msk340i

I asked PTF and they said it's fine to stack it. I'm using map 1 only so I believe I should be fine. I'm not looking for big power and stage 2 requires a downpipe which I'm not ready for yet. Thank you though

Okay fair enough, PTF are the experts!! Let us know how she runs!

[kern417]

Originally Posted by Araemo

Hah! A 3rd gear pull is well into felony territory. 6500 RPM in 3rd is 98 Mph.

The best I could realistically do is a 2nd gear pull.

Originally Posted by j1980mac

I know right!

4th is where the fun is i was doing 130mph all weekend in Mexico. Actually i was kind of surprised because My previous cars barely broke 110 in 4th and I didn't realize how high it went until the end of the pull lol.

[kern417]

Originally Posted by msk340i

I asked PTF and they said it's fine to stack it. I'm using map 1 only so I believe I should be fine. I'm not looking for big power and stage 2 requires a downpipe which I'm not ready for yet. Thank you though

Stage 2 runs more boost pressure. Using a piggyback to increase boost pressure doesn't mean you don't need a downpipe, and you'll have worse control of the increased boost than you would with the actual stage 2 tune. You're really not helping yourself out with this one.

[msk340i]

Originally Posted by kern417

Stage 2 runs more boost pressure. Using a piggyback to increase boost pressure doesn't mean you don't need a downpipe, and you'll have worse control of the increased boost than you would with the actual stage 2 tune. You're really not helping yourself out with this one.

Makes sense! Ughgh... Is there a high-flow downpipe that doesn't increase noise?

[j1980mac]

Originally Posted by msk340i

Makes sense! Ughgh... Is there a high-flow downpipe that doesn't increase noise?

No, then it wouldn't be a high flow DP!

If you want less noise, don't go catless. I've got the ER catted. It's 200 cell. It's not as loud as catless. Smell is tolerable.

[msk340i]

Originally Posted by j1980mac

No, then it wouldn't be a high flow DP!

If you want less noise, don't go catless. I've got the ER catted. It's 200 cell. It's not as loud as catless. Smell is tolerable.

Catch 22!!!

[hybris]

Originally Posted by msk340i

I asked PTF and they said it's fine to stack it. I'm using map 1 only so I believe I should be fine. I'm not looking for big power and stage 2 requires a downpipe which I'm not ready for yet. Thank you though

But if you stack it to increase boost, you'll end up at stage 2 level power (and would still require a downpipe, or not), so not sure why you couldn't just as well just use BM3 stage 2?

[hybris]

Originally Posted by msk340i

Catch 22!!!

I'm pretty sure stage 2 doesn't require a catless downpipe. A catted, high flow downpipe shouldn't increase noise that much.

[hybris]

Originally Posted by EricVR4

This is my problem as well. I'd love to log a few runs for my own sanity and so I can send some stuff to PTF but I live in the city in Houston and HPD is EVERYWHERE. There are zero areas for me to open the car up on.

So, why do you need more power in the car, exactly?

[B58]

Originally Posted by msk340i

Can someone please help me with this. My car is on bootmod3 stage 1 93. I connected my jb4 today and did some logs on maps 0,1, and 2. The peak boost is about thesame for all three maps. Any idea what's going on?

You need the MHD back end flash if you want to run the JB4 properly. I wouldn't mix and match the JB4 with BM3.

[MTWO]

Mhd is just a flasher you could flash the same thing with any. Flasher is like a funnel or a garbage chute, throw anything you like down the damn thing, it’ll eventually go down to the bottom. If already voiding your warranty I’d void it in the best way possible and go all custom with like Cary Jordan or Paul Johnson. Those guys kick ass with their custom stuff its all over setting records.

[kern417]

Originally Posted by msk340i

Makes sense! Ughgh... Is there a high-flow downpipe that doesn't increase noise?

Originally Posted by j1980mac

No, then it wouldn't be a high flow DP!

If you want less noise, don't go catless. I've got the ER catted. It's 200 cell. It's not as loud as catless. Smell is tolerable.

Yep go catted. And keep the rest of the exhaust stock or use an axleback with flaps.

[EricVR4]

Originally Posted by hybris

So, why do you need more power in the car, exactly?

Because I'm a car guy

And so I can use it when I'm able to...it's also nice to have when you need it as well.

I take the car in other areas too while on drives and I could use it then. I just meant in terms of easily logging the car by making multiples runs.....that part is difficult living in the city haha.

[FSociety]

Originally Posted by MTWO

I see zero point running JB4 after you go flash unless you like spray meth maybe but that’s it. Even then most guys I know use something that doesn’t connect to the car that then blocks BM3 logging like aem or snow performance meth. There is another called Torqbyte that people are running but I haven’t tried or seen it on a car in person yet.

+1
JB4 meth failsafe is not 100%, so many cars that have caught fire 99% all have jb4 controlling meth go figure.

Originally Posted by MTWO

Mhd is just a flasher you could flash the same thing with any. Flasher is like a funnel or a garbage chute, throw anything you like down the damn thing, it’ll eventually go down to the bottom. If already voiding your warranty I’d void it in the best way possible and go all custom with like Cary Jordan or Paul Johnson. Those guys kick ass with their custom stuff its all over setting records.

+1

Also Juan@BigBoost_Turbo has Stock Turbo & Upgraded Turbo WR

and HCP currently has the Fastest B58 in the UK

[j1980mac]

Originally Posted by kern417

Yep go catted. And keep the rest of the exhaust stock or use an axleback with flaps.

How do you think an X3 M40i would sound with a catted DP and removal of the resonator?

I have an ER catted DP (200 cell) but I'm thinking of removing my resonator for increased sound while in Sport & Sport +. Do you think the exhaust flaps are enough to keep the drone at bay?