[GoodGuyAvi]

Hi guys ! Happy New Year.
Trying to find downpipe for my 430i xdrive B48.(Currently running on JB+ with BMS Intake) The only one branded downpipe is Armytrix (800$. ) The chipper price is REV9 and RM Motors (300$.)
Any recommendation ? "Do I need to tune the car after custom downpipe?" Do I will get errors ? I tried to research but there is not much info about it. Maybe some one already did a work. Any help will be much appreciate it !

Best Regards.
Avi

[eleven11]

Evolution Racewerks:
http://www.evolutionracewerks.com/catalog/299

Price difference is catless vs catted. You will get CEL if catless. I'm not sure if ER makes any guarantees about CEL with their catted system.

[Ray-India]

nearly all companies make downpipes for the B48 now. Fi, Armytrix, Evo RW etc.. chose based on prices cuz some are ridiculously priced.

[MR1818]

had been using a custom catless downpipe while using JB4 and was fine. not too sure if the dummy o2 sensor did the job or JB4 as there was no error codes triggered. as far as i know JB4 is able to bypass the o2 sensor even if you have changed to a catless downpipe the JB4 will disable it.

[GoodGuyAvi]

thank you guys !

[CandyRedRC46]

The original JB4 was able to ignore the rear o2 sensor. The newer JB4 will allow the ECU continue to read the rear o2 sensor.I am not sure which JB4 you have installed, but you can easily install a "spark plug defouler" in between your downpipe and rear o2 sensor to avoid catless check engine lights or flash your ecu when ever it is released from Bootmod3. You definitely don't need to tune for a catless downpipe, but you should if you want to get the most out of it.

[GoodGuyAvi]

Originally Posted by CandyRedRC46

The original JB4 was able to ignore the rear o2 sensor. The newer JB4 will allow the ECU continue to read the rear o2 sensor.I am not sure which JB4 you have installed, but you can easily install a "spark plug defouler" in between your downpipe and rear o2 sensor to avoid catless check engine lights or flash your ecu when ever it is released from Bootmod3. You definitely don't need to tune for a catless downpipe, but you should if you want to get the most out of it.

Damn....thank u sir !!!!

[mike@x-ph.com]

Hey guys,
Evolution Racewerks offers the B46 downpipe not B48.

Armytrix offers the B48

Evolution Racewerks are currently working on releasing a B48 version soon

[MR1818]

Originally Posted by AvetNY

Damn....thank u sir !!!!

as for now i dont have to worry about the o2 sensor as i've tuned my 330i and running so far so good...

[hybris]

Originally Posted by mike@x-ph.com

Hey guys,
Evolution Racewerks offers the B46 downpipe not B48.

Armytrix offers the B48

Evolution Racewerks are currently working on releasing a B48 version soon

Do you know roughly what pricerange the Evolution Racewerks downpipe will be in?

[mike@x-ph.com]

Originally Posted by hybris

Do you know roughly what pricerange the Evolution Racewerks downpipe will be in?

I would assume its similar to their B46 downpipe which retails at $545

[hybris]

Originally Posted by mike@x-ph.com

I would assume its similar to their B46 downpipe which retails at $545

Thank you. Do you also happen to know if the B48 has any burbles / pops / bangs when you decat it? Mine has the BMS intake + basically straight piped after the cat, but it's still annoyingly polite..

[CapitaineBeaver]

Originally Posted by hybris

Thank you. Do you also happen to know if the B48 has any burbles / pops / bangs when you decat it? Mine has the BMS intake + basically straight piped after the cat, but it's still annoyingly polite..

I only got the JB4 and dinan axleback and there are some pops and bangs and a little bit of burble (as well as the braaap (spark cut)) on shift but it's still, ro use your term, polite (but better than OEM axleback). I have yet to see a dp'ed b46/48 around here but i'm sure it would sounds very nice. I'm looking at the ER b46 downpipe myself but even if my dealer is mods friendly they have good and bad days about DP. I'm still personally waiting on BM3 flash to replace the JB4 once it comes out for our engine before splurging on a DP.

Also I did not know the B46 amd B48 didnt share the same DP even if both are essentially the same engine besides anti-pollution.

[hybris]

Originally Posted by CapitaineBeaver

I only got the JB4 and dinan axleback and there are some pops and bangs and a little bit of burble (as well as the braaap (spark cut)) on shift but it's still, ro use your term, polite (but better than OEM axleback).

Hm, I'm getting no pops and bangs whatsoever.

Have BMS Intake, mid muffler delete and straight through / free flow design magnaflow rear muffler, and JB+.

[CapitaineBeaver]

Originally Posted by hybris

Hm, I'm getting no pops and bangs whatsoever.

Have BMS Intake, mid muffler delete and straight through / free flow design magnaflow rear muffler, and JB+.

I had some modest pop and bangs on my previous 2017 230i with B46 as well with just the jb4 keeping the exhaust valve opened. I'm not familiar at all with the 330e (I have yet to see one around here) but from a quick search it seems like a detuned B48 engine (184hp and 215ft/lb) mated with an electric engine (87hp and 184ft/lb) that gives a total of 248 hp and 310ft/lb vs the B46 (in my case) which has 248hp and 258ft/lb. In my case it was approximated that I should be with current mods around the 290-300hp and 320-330ft/lb range.

[hybris]

Originally Posted by CapitaineBeaver

I had some modest pop and bangs on my previous 2017 230i with B46 as well with just the jb4 keeping the exhaust valve opened. I'm not familiar at all with the 330e (I have yet to see one around here) but from a quick search it seems like a detuned B48 engine (184hp and 215ft/lb) mated with an electric engine (87hp and 184ft/lb) that gives a total of 248 hp and 310ft/lb vs the B46 (in my case) which has 248hp and 258ft/lb. In my case it was approximated that I should be with current mods around the 290-300hp and 320-330ft/lb range.

That's correct. It's a B48 with the same tune as in the 320i + an electric engine. I had a piggyback earlier that got a system power of around 315bhp and 500nm, but had some issues with error codes, so just a JB+ for now, around 280hp probably. But where no pops and bangs with the 315hp tune either (that tune had the B48 running at around 250hp).

Considering a remap since the B48 has been cracked now, but actually pretty happy with the current tune, the combination with the electric engine gives a really good torque curve. But would like a bit of burbles and bangs, that's why I'm looking into a decat or sports cat.

[CapitaineBeaver]

Originally Posted by hybris

That's correct. It's a B48 with the same tune as in the 320i + an electric engine. I had a piggyback earlier that got a system power of around 315bhp and 500nm, but had some issues with error codes, so just a JB+ for now, around 280hp probably. But where no pops and bangs with the 315hp tune either (that tune had the B48 running at around 250hp).

Considering a remap since the B48 has been cracked now, but actually pretty happy with the current tune, the combination with the electric engine gives a really good torque curve. But would like a bit of burbles and bangs, that's why I'm looking into a decat or sports cat.

It seems it might be related to the exhaust then. Just a quick look at diagram the exhaust is really different on the 330e than on the 230 or even different than the regular 330.

[hybris]

The RM Motors alternatives looks pretty decent. They've got both with (100 or 200 cell) and without cat as well. Even one with a silencer instead of cat. https://rm-motors.pl/en/47-seria3?&p=3

[hybris]

Related question, I read here and there that running a catless downpipe will cause the car to run (too) lean. Is that the case for the B48 platform? They're running very lean to begin with, so probably not a good idea to make modifications that makes them lean out even more (if that is the case).

[CapitaineBeaver]

Originally Posted by hybris

Related question, I read here and there that running a catless downpipe will cause the car to run (too) lean. Is that the case for the B48 platform? They're running very lean to begin with, so probably not a good idea to make modifications that makes them lean out even more (if that is the case).

If you are going the DP route I would suggest you get either a JB4 or a flash tune to get along not getting a CEL and make sure stuff runs right. Problem is not sure on the compatibility with the hybrid system you have. I know you are looking to get more sound but the tune, at least to me, is a requirement to run DP right and the JB+ as good as it gets for power lack in terms of functionality and festures.

[hybris]

Originally Posted by CapitaineBeaver

If you are going the DP route I would suggest you get either a JB4 or a flash tune to get along not getting a CEL and make sure stuff runs right. Problem is not sure on the compatibility with the hybrid system you have. I know you are looking to get more sound but the tune, at least to me, is a requirement to run DP right and the JB+ as good as it gets for power lack in terms of functionality and festures.

Based both on my own and others experience with the 330e, I'm pretty confident that the engine is 100% identical to a 320i B48. The electric motor is in the transmission and apparently combines its output with the petrol engine seamlessy regardless of tune (I've already had several different setups on my own car, and there are a number of tuners who provide piggybacks for 330e). BMW also have this exact electric engine combined with several engine tunes (330e, 530e, x5 40e, etc).

I'm prepared to get a CEL, and have both Carly and Dashcommand that will allow me to check what actual codes are thrown (so I won't just blindly accept a CEL-light without checking what is causing it).

Dashcommand also allows me to check my AFR in real time to make sure that AFR still looks okay after installing a DP (I have done a number of logs/runs to know how the car runs now). As I understand, even if I had a JB4, it wouldn't let me actively adjust AFR anyway? Also, the JB4 doesn't automatically clear CELs anymore either?

I'm however considering a flash tune, so may do that after the DP, depending on how it turns out.

So, after that defense speech I do appreciate the advice, and basically agree on your point too. Just wanted to explain that I wasn't planning on flying blind with just a DP. I was just asking because I was wondering whether I should expect to be running lean, or if it would most likely be okay with the current setup.

[CapitaineBeaver]

Originally Posted by hybris

Based both on my own and others experience with the 330e, I'm pretty confident that the engine is 100% identical to a 320i B48. The electric motor is in the transmission and apparently combines its output with the petrol engine seamlessy regardless of tune (I've already had several different setups on my own car, and there are a number of tuners who provide piggybacks for 330e). BMW also have this exact electric engine combined with several engine tunes (330e, 530e, x5 40e, etc).

I'm prepared to get a CEL, and have both Carly and Dashcommand that will allow me to check what actual codes are thrown (so I won't just blindly accept a CEL-light without checking what is causing it).

Dashcommand also allows me to check my AFR in real time to make sure that AFR still looks okay after installing a DP (I have done a number of logs/runs to know how the car runs now). As I understand, even if I had a JB4, it wouldn't let me actively adjust AFR anyway? Also, the JB4 doesn't automatically clear CELs anymore either?

I'm however considering a flash tune, so may do that after the DP, depending on how it turns out.

So, after that defense speech I do appreciate the advice, and basically agree on your point too. Just wanted to explain that I wasn't planning on flying blind with just a DP. I was just asking because I was wondering whether I should expect to be running lean, or if it would most likely be okay with the current setup.

I really hope first of all you did not perceive my last post as an attack because it was far from that and if it did sorry about that

You sure do know a lot more than me regarding the 330e (since as I said never saw one here and not sure this model is available here yet) and that version of the B48 (since we do not have 320i anymore on this side of the ocean).

It's good that you are informed and looking into your tunes and stuff (i'm sure we could be buddies IRL lol)

The JB4 do not allow you to modify AFR per say but it can help a little bit on that side with some mino ajustment (Flash tune is better in that optic). Regarding the CEL, the JB4 STILL does active CEL clear BUT not if you are located in the USA (which you are not) and I think it's that way to be able to be CARB approved in the states.

Our engines seems to be running on the leaner side of things anyway with the factory tune. It's sure DP could make it a bit leaner (It was not the case on my N54 335 I had before but I had a flash tune on it) if you keep looking into your stuff you should be good ! Good to know, to quote you, that you are not flying blind into this !

EDIT : You might also want to reach out to a guy named mr_b48 on IG, it's a Malaysian guy, i've been in touch a few times with him since he has a pretty heavily modded 330i and seem (just like us) to know his stuff and has been playing a bit longer than me on his engine and car !