BM3 stage 1 questions

rjd_F30 · 08-14-2018, 06:38 AM

Quote:

Originally Posted by Steakpizza

Sorry for jumping in, but Could you explain what the difference between catted and catless downpipes are?

I live in Pa and catless DPs are illegal (won't pass emissions). Wouldn't a catted DP have the same effect while being legal? What's the main pros and cons of them?

Thanks again, I've been wanting to get a DP but I feel like passing inspection will be a pain in the ass.

Quote:

Originally Posted by uravgbmwdriver

All downpipes from the factory are required to have catalytic converters to filter out the harmful fumes that come from the engine. However, cats rob horsepower, and by taking them off you can get massive power gains with the right tune.

Here where I live, they never check emissions so I could go catless if I wanted to. An alternative would be getting a high flow catted downpipe that would probably pass emissions.

In short, the key to increasing power is reducing back pressure, and people go catless to do just that.

Well the difference is catless downpipes have no catalytic converter to filter out harmful waste gases, and catted downpipes have a high flow catalytic converter. Contrary to the above post, you WILL NOT pass emissions with a high flow catted downpipe. The reason people have high-flow catted downpipes is because they don't like the added loudness that comes with catless downpipes and/or they don't like the smell. Those are the only benefits to a high-flow catted downpipe over a catless one: reduced noise and reduced smell. You will get slightly higher power gains from catless due to the greater reduction in restriction, but nothing huge over high-flow catted.

I too live in a state with emissions inspections, but I went catless anyway. I'm kind of in the "cross that bridge when I come to it" mentality. I may have to reinstall the stock downpipe, or I may have to pay for someone to pass it if that's a thing still. Not sure how I'm gonna work that out but I don't have to worry about it for another 2 years

JY01 · 08-14-2018, 06:54 AM

Quote:

Originally Posted by Steakpizza

Quote:

Originally Posted by uravgbmwdriver

All downpipes from the factory are required to have catalytic converters to filter out the harmful fumes that come from the engine. However, cats rob horsepower, and by taking them off you can get massive power gains with the right tune.

Here where I live, they never check emissions so I could go catless if I wanted to. An alternative would be getting a high flow catted downpipe that would probably pass emissions.

In short, the key to increasing power is reducing back pressure, and people go catless to do just that.

With the high flow cats, how are they in comparison to catless? In terms of power gain, if any?

I don't think there's a huge difference, maybe around 10-15hp. The biggest difference is the sound. With catless you'll get more crackles

BunkerJ · 08-14-2018, 09:33 AM

You might as well go catless IMO. More power, better sound. High flow catted will still probably cause you to fail tbh.

JG_Coupe88 · 08-14-2018, 04:26 PM

Sole reason I haven't gone catless or hi flow is the inspection aspect as well. Between work and school both full time, don't have the kind of time to be switching back to stock for inspection and back over, that sounds like an annoying hassle. Otherwise I'm happy with the stage 1 gains, would be really nice to be stage 2 though.

BunkerJ · 08-14-2018, 04:44 PM

Quote:

Originally Posted by JG_Coupe88

Sole reason I haven't gone catless or hi flow is the inspection aspect as well. Between work and school both full time, don't have the kind of time to be switching back to stock for inspection and back over, that sounds like an annoying hassle. Otherwise I'm happy with the stage 1 gains, would be really nice to be stage 2 though.

You still have plenty of time to rock a catless. Don't have to smog for six years on your vehicle date!

rjd_F30 · 08-14-2018, 04:47 PM

Quote:

Originally Posted by JG_Coupe88

Sole reason I haven't gone catless or hi flow is the inspection aspect as well. Between work and school both full time, don't have the kind of time to be switching back to stock for inspection and back over, that sounds like an annoying hassle. Otherwise I'm happy with the stage 1 gains, would be really nice to be stage 2 though.

Quote:

Originally Posted by BunkerJ

You still have plenty of time to rock a catless. Don't have to smog for six years on your vehicle date!

No excuse now!

Steakpizza · 08-14-2018, 04:48 PM

Quote:

Originally Posted by BunkerJ

You still have plenty of time to rock a catless. Don't have to smog for six years on your vehicle date!

In Pa we have emissions every year I believe. Just like 500$ for install and removal yearly for a DP seems eh lol

JG_Coupe88 · 08-14-2018, 05:12 PM

Quote:

Originally Posted by BunkerJ

You still have plenty of time to rock a catless. Don't have to smog for six years on your vehicle date!

Quote:

Originally Posted by rjdnyy224

No excuse now!

Ugh you guys kill me! Wow I did not know that about socal! Okay... Maybeeee.. Probably... Most likely.. this fall time

:. Just dropped a bunch of dough on an order of KW V2's

and a bday Germany trip coming up. I'll enjoy this little stage 1 in the meantime, then sooner or later I'll join you stage 2 high rollers.

rjd_F30 · 08-14-2018, 09:46 PM

Quote:

Originally Posted by JG_Coupe88

Ugh you guys kill me! Wow I did not know that about socal! Okay... Maybeeee.. Probably... Most likely.. this fall time

:. Just dropped a bunch of dough on an order of KW V2's

and a bday Germany trip coming up. I'll enjoy this little stage 1 in the meantime, then sooner or later I'll join you stage 2 high rollers.

Hahaha Peer pressure at its best. You won't regret going catless when/if ever you do, trust me

feng · 08-15-2018, 06:20 AM

Hi guys/gals.

I just flashed my 2014 328i F31 with Stage 1 OTS 93 Octane.

Painless process and a definite improvement over stock and JB Stage 1.

Reponding to OP, there is a definite difference in burble duration on the OTS Stage 1 map. Its no more aggressive, but it's definitely noticeably longer than stock. So much so that I flashed it with OEM burbles in the config just to test and sure enough, it was back to the stock burbles.

Shopping around for downpipe etc and have the $50 all you can eat OTS bundle in preparation for Stage 2.

JY01 · 08-15-2018, 08:14 AM

Quote:

Originally Posted by feng

Hi guys/gals.

I just flashed my 2014 328i F31 with Stage 1 OTS 93 Octane.

Painless process and a definite improvement over stock and JB Stage 1.

Reponding to OP, there is a definite difference in burble duration on the OTS Stage 1 map. Its no more aggressive, but it's definitely noticeably longer than stock. So much so that I flashed it with OEM burbles in the config just to test and sure enough, it was back to the stock burbles.

Shopping around for downpipe etc and have the $50 all you can eat OTS bundle in preparation for Stage 2.

Sounds great, I'm getting my enet cable today!

Gotta wait for the end of the school day to flash stage 1. Can't wait lmao

BunkerJ · 08-15-2018, 09:22 AM

Quote:

Originally Posted by Steakpizza

In Pa we have emissions every year I believe. Just like 500$ for install and removal yearly for a DP seems eh lol

Yeah, ours is every year as well but you get six years from the vehicle production year until you need to smog every year. And the real issue here is who is making you pay that much for a downpipe???? That's ridiculous.

Diegov209 · 08-15-2018, 11:54 AM

I'm supiresed my car didn't blow up on this pull. It felt fast though.

http://www.bootmod3.net/log?id=5b7456b4d10b4335f7a35665
I even got aggressive burbles when it wasnt the agg map lol this log was scary lol.

JG_Coupe88 · 08-15-2018, 01:09 PM

Quote:

Originally Posted by uravgbmwdriver

Sounds great, I'm getting my enet cable today!

Gotta wait for the end of the school day to flash stage 1. Can't wait lmao

Let us know how you like it.

JY01 · 08-15-2018, 02:47 PM

I'm having problems with activating my car. When I go into the "Activate Vehicle" menu on bootmod3.net it says "OBD agent not found", even though my laptop is connected to the car and the OBD agent is running. However, when I'm logging in, there is text that says OBD agent found - VIN unavailable.

Could this be a problem with my Ethernet to USB adapter? I have a Mac and I'm using the Amazon Basics adapter. I might go and buy the official Apple one tonight, but I don't know if that's the only issue.

Steakpizza · 08-15-2018, 05:55 PM

Quote:

Originally Posted by uravgbmwdriver

I'm having problems with activating my car. When I go into the "Activate Vehicle" menu on bootmod3.net it says "OBD agent not found", even though my laptop is connected to the car and the OBD agent is running. However, when I'm logging in, there is text that says OBD agent found - VIN unavailable.

Could this be a problem with my Ethernet to USB adapter? I have a Mac and I'm using the Amazon Basics adapter. I might go and buy the official Apple one tonight, but I don't know if that's the only issue.

I would email them. I accidentally typed in the wrong VIN initially and they helped me within a few hours. You do have to be connected to the internet though on your laptop. Mine was spotty so the website would kind of go in and out.

JY01 · 08-15-2018, 08:20 PM

Hey guys, my car is stage 1 now

Everything about the tune is so smooth and honestly feels like an in-line 6. And the burbles are retarded

As for the problem I had earlier, I got one of the people to control my computer remotely. Turns out my computer didn't allow Ethernet connections, but they got it all fixed.

Thanks everyone for the help

S3RIES28 · 08-15-2018, 08:28 PM

Can someone post vid of their burbles with Stage 1. My car doesn't have any burbles on deceleration on Stage 1. Only when i upshift while WOT but this was happening even when i was on Dinan Sportronics so it has nothing to do with BM3.

JY01 · 08-15-2018, 08:35 PM

Quote:

Originally Posted by S3RIES28

Can someone post vid of their burbles with Stage 1. My car doesn't have any burbles on deceleration on Stage 1. Only when i upshift while WOT but this was happening even when i was on Dinan Sportronics so it has nothing to do with BM3.

Yeah I can try recording some videos in the near future. I always drive with DSC off which gives me a lot of burbles. I also have a muffler delete if that makes a difference.

rjd_F30 · 08-15-2018, 08:44 PM

Quote:

Originally Posted by Steakpizza

With the high flow cats, how are they in comparison to catless? In terms of power gain, if any?

You'll get a little bit more power with catless, maybe 10 extra WHP? Not totally sure, just guessing, but catless, just logically, definitely awards a bit more power.

Steakpizza · 08-15-2018, 08:57 PM

Quote:

Originally Posted by rjdnyy224

You'll get a little bit more power with catless, maybe 10 extra WHP? Not totally sure, just guessing, but catless, just logically, definitely awards a bit more power.

Yeah I'm like 100% gonna go catless now and just bite the bullet when inspection comes around

rjd_F30 · 08-15-2018, 08:57 PM

Quote:

Originally Posted by Steakpizza

Yeah I'm like 100% gonna go catless now and just bite the bullet when inspection comes around

Haha nice, you'll enjoy it I promise

08-14-2018, 09:33 AM	#25
BunkerJ Colonel 1032 Rep 2,382 Posts Drives: 2013 328i Join Date: Mar 2017 Location: San Diego, CA iTrader: (0)	You might as well go catless IMO. More power, better sound. High flow catted will still probably cause you to fail tbh. __________________ 2013 F30 328i: MHI Big Turbo, GFB DV+, Mishimoto CAI, ER TIC/CP/Catless DP, AWE Touring Quad Exhaust w/ Resonated Midpipe, NGK LI Plugs, BM3 with PTF Stage 2 91 AGG Tune, Fuel-it Stage 2 LPFP, Solowerks S1 Coilovers, and DEPO/M-Sport Retrofit
	Appreciate 1 rjd_F301999.50 Quote

08-14-2018, 04:26 PM	#26
JG_Coupe88 Second Lieutenant 256 Rep 245 Posts Drives: F10 M5, E36 M3 Join Date: Dec 2017 Location: San Diego, CA iTrader: (0) Garage List 2018 BMW M3 [0.00]	Sole reason I haven't gone catless or hi flow is the inspection aspect as well. Between work and school both full time, don't have the kind of time to be switching back to stock for inspection and back over, that sounds like an annoying hassle. Otherwise I'm happy with the stage 1 gains, would be really nice to be stage 2 though.
	Appreciate 0 Quote

08-15-2018, 06:20 AM	#32
feng Lieutenant 128 Rep 504 Posts Drives: 2014 F31 328i M-Sport AW Join Date: Nov 2014 Location: Brisbane iTrader: (0)	Hi guys/gals. I just flashed my 2014 328i F31 with Stage 1 OTS 93 Octane. Painless process and a definite improvement over stock and JB Stage 1. Reponding to OP, there is a definite difference in burble duration on the OTS Stage 1 map. Its no more aggressive, but it's definitely noticeably longer than stock. So much so that I flashed it with OEM burbles in the config just to test and sure enough, it was back to the stock burbles. Shopping around for downpipe etc and have the $50 all you can eat OTS bundle in preparation for Stage 2.
	Appreciate 0 Quote

08-15-2018, 11:54 AM	#35
Diegov209 Captain 165 Rep 657 Posts Drives: 540i Xdrive Join Date: Mar 2017 Location: Riverbank,CA iTrader: (0)	I'm supiresed my car didn't blow up on this pull. It felt fast though. http://www.bootmod3.net/log?id=5b7456b4d10b4335f7a35665 I even got aggressive burbles when it wasnt the agg map lol this log was scary lol. __________________ Current: 2017 Bmw 540i M sport bluestone metallic Previous:F30 328i 2012 PWG: FBO Vrsf 6 stepped fmic, Afe intake, Catless DP ER, FTP CP's, FTP turbo inlet, GFB DV+, Gplus oil cooler, BM3 stg 2 tune, Cary Jordan E50 tuned stock fuel system.
	Appreciate 1 MAKH 588.50 Quote

08-15-2018, 02:47 PM	#37
JY01 JY01 685 Rep 299 Posts Drives: 2023 BMW M4 Competition xDrive Join Date: Feb 2018 Location: Florida iTrader: (0)	I'm having problems with activating my car. When I go into the "Activate Vehicle" menu on bootmod3.net it says "OBD agent not found", even though my laptop is connected to the car and the OBD agent is running. However, when I'm logging in, there is text that says OBD agent found - VIN unavailable. Could this be a problem with my Ethernet to USB adapter? I have a Mac and I'm using the Amazon Basics adapter. I might go and buy the official Apple one tonight, but I don't know if that's the only issue.
	Appreciate 0 Quote

08-15-2018, 08:20 PM	#39
JY01 JY01 685 Rep 299 Posts Drives: 2023 BMW M4 Competition xDrive Join Date: Feb 2018 Location: Florida iTrader: (0)	Hey guys, my car is stage 1 now Everything about the tune is so smooth and honestly feels like an in-line 6. And the burbles are retarded As for the problem I had earlier, I got one of the people to control my computer remotely. Turns out my computer didn't allow Ethernet connections, but they got it all fixed. Thanks everyone for the help
	Appreciate 0 Quote

08-15-2018, 08:28 PM	#40
S3RIES28 Enlisted Member 21 Rep 31 Posts Drives: F30 328i M Sport Join Date: Sep 2016 Location: Lime Rock, CT iTrader: (0)	Can someone post vid of their burbles with Stage 1. My car doesn't have any burbles on deceleration on Stage 1. Only when i upshift while WOT but this was happening even when i was on Dinan Sportronics so it has nothing to do with BM3.
	Appreciate 0 Quote