JB4 for Mazda 2.5L Turbo

[Villopiero]

Hi guys, do you reckon we could benefit from 1 step colder spark plugs?

[Slow3]

What should setting be for the fuel open loop 50 or 60?

[Villopiero]

is this thread dead? Terry @ BMS will you be bringing any updates / new parts?

[Slow3]

I guess it’s on vacation lol

[Terry @ BMS]

Hi guys, do you reckon we could benefit from 1 step colder spark plugs?

Factory plugs and gap have been fine, no reason to change them.

[Terry @ BMS]

is this thread dead? Terry @ BMS will you be bringing any updates / new parts?

When we have new Mazda stuff to talk about don't worry, we won't forget to post it.

[Terry @ BMS]

Yesterday I was doing a couple pulls and noticed that boost will go up and down when accelerating. It feels like it’s cutting out in power or something. Any suggestions guys?

Could be normal as boost decays towards redline. Without a JB4 log, hard to evaluate it.

[Villopiero]

hi guys, idk if this is the right place, I'm selling my catch can, its basically new, used it for 1000 miles and had nothing deposit in it, all hardware in included, selling it because it doesn't fit with my CS intake. Im selling for 120$. let me know!

[Havok]

hi guys, idk if this is the right place, I'm selling my catch can, its basically new, used it for 1000 miles and had nothing deposit in it, all hardware in included, selling it because it doesn't fit with my CS intake. Im selling for 120$. let me know!

That include shipping?

[Villopiero]

That include shipping?

no, you guys can use parcel monkey it’s mad cheap and have it picked up from me

[Cx99]

Sorry to be a pain, but there is a lot of info to trawl through, and not all of it is related to my situation/vehicle. I have a MY19 CX-9 and live in Australia. It remains mechanically stock standard and runs exclusively on 98ron(93?) fuel. I will fit a KN filter when i replace the air filter next but that's it, i won't be changing exhaust or intake etc as i want to retain standard looks and sound.

Should i get a JB4, is it basically plug and play with what i can see? What map would i want to run and what's the expectation regarding improvement i should see?

Anything else i should know or look into?

[AH557]

Sorry to be a pain, but there is a lot of info to trawl through, and not all of it is related to my situation/vehicle. I have a MY19 CX-9 and live in Australia. It remains mechanically stock standard and runs exclusively on 98ron(93?) fuel. I will fit a KN filter when i replace the air filter next but that's it, i won't be changing exhaust or intake etc as i want to retain standard looks and sound.

Should i get a JB4, is it basically plug and play with what i can see? What map would i want to run and what's the expectation regarding improvement i should see?

Anything else i should know or look into?

Yes Its basically plug in play, I ran it with stock intake/exhaust for a while. You can run map 2 without any issues and you'll definitely notice improvement in the the mid to high rpm range.

[Terry @ BMS]

Sorry to be a pain, but there is a lot of info to trawl through, and not all of it is related to my situation/vehicle. I have a MY19 CX-9 and live in Australia. It remains mechanically stock standard and runs exclusively on 98ron(93?) fuel. I will fit a KN filter when i replace the air filter next but that's it, i won't be changing exhaust or intake etc as i want to retain standard looks and sound.

Should i get a JB4, is it basically plug and play with what i can see? What map would i want to run and what's the expectation regarding improvement i should see?

Anything else i should know or look into?

Just install JB4 and enjoy, nothing else needed.

[Shrike]

Hi All,

Is the Fuel-Open Loop setting supposed to be 50 or 60. JB4 factory settings have it at 50, but the Firmware website has it listed as 60.

[SixPackABS]

Jesus my app updated by itself........ it is a bit buggy. Selecting the oil temp will force exit the app

[JNance]

Guys, I’ve installed the CS turbo intake pipe (TIP) with the factory air box; not easy to get the MAF elbow on, but can be done. Install was pretty straight forward other than that portion; instructions were excellent! Current mods are K&N drop in filter, Burger JB4, and rear *** delete. All I can say is WOW! The power above 4,000rpm is amazing; part throttle and full throttle. This is the best compliment to the JB4! You will not be disappointed, buy the CS or Burger TIP and be blown away by the top end power.

Next, I’m installing the CS FMIC and boost tubes. I’ve already received them, just haven’t installed.

I did have a check engine pop-up yesterday during manual shifting and full throttle pulls, but there was not code that popped up, even checked multiple times, might have just pissed it off over revving it. It’s been happy since

[Havok]

Guys, I’ve installed the CS turbo intake pipe (TIP) with the factory air box; not easy to get the MAF elbow on, but can be done. Install was pretty straight forward other than that portion; instructions were excellent! Current mods are K&N drop in filter, Burger JB4, and rear *** delete. All I can say is WOW! The power above 4,000rpm is amazing; part throttle and full throttle. This is the best compliment to the JB4! You will not be disappointed, buy the CS or Burger TIP and be blown away by the top end power.

Next, I’m installing the CS FMIC and boost tubes. I’ve already received them, just haven’t installed.

I did have a check engine pop-up yesterday during manual shifting and full throttle pulls, but there was not code that popped up, even checked multiple times, might have just pissed it off over revving it. It’s been happy since

I didnt know CS had a FMIC for the 4th gen yet. Ill have to check it out

[Havok]

Guys, I’ve installed the CS turbo intake pipe (TIP) with the factory air box; not easy to get the MAF elbow on, but can be done. Install was pretty straight forward other than that portion; instructions were excellent! Current mods are K&N drop in filter, Burger JB4, and rear *** delete. All I can say is WOW! The power above 4,000rpm is amazing; part throttle and full throttle. This is the best compliment to the JB4! You will not be disappointed, buy the CS or Burger TIP and be blown away by the top end power.

Next, I’m installing the CS FMIC and boost tubes. I’ve already received them, just haven’t installed.

I did have a check engine pop-up yesterday during manual shifting and full throttle pulls, but there was not code that popped up, even checked multiple times, might have just pissed it off over revving it. It’s been happy since

Do you have a link? I dont see it on the website

[JNance]

https://corksport.com/2018-mazda-6-turbo-2.5l-intercooler-upgrade.html

[Havok]

https://corksport.com/2018-mazda-6-t...r-upgrade.html

Oh it looks like they have not made it to fit the 3

[Payam @ BMS]

Oh it looks like they have not made it to fit the 3

The new Mazda 3 are air to liquid intercoolers so they are much more complex than the traditional air to air intercoolers like posted above.

[joe.mzd]

As an overlander, my application of mods is with a different purpose or goal. That’s why I was looking forward to being able to monitor transmission temps, as that can prove to be crucial to monitor in high-altitude low-speed climbs off-road up the mountains. I see a beta version actually replaces the Trans Temp value for another sensor value. I take it there’s no way to get transmission temps or equivalent using the JB4? Am I able to use the JB4 with something else, say, a Scangauge II connected to the OBD2 port?

[AH557]

As an overlander, my application of mods is with a different purpose or goal. That’s why I was looking forward to being able to monitor transmission temps, as that can prove to be crucial to monitor in high-altitude low-speed climbs off-road up the mountains. I see a beta version actually replaces the Trans Temp value for another sensor value. I take it there’s no way to get transmission temps or equivalent using the JB4? Am I able to use the JB4 with something else, say, a Scangauge II connected to the OBD2 port?

You could just use the earlier firmware with the trans temp... maybe Payam @ BMS could confirm?

[Terry @ BMS]

We've never had trans temp as a logging channel on the Mazda platform. We used that field for unrelated data previously.

If there is enough demand we can work on adding the channel though.

[joe.mzd]

I have to admit, I'm sure the demand for it won't be there. I doubt there are many doing what I'm doing taking the CX-30 off-road on steep climbs.

My understanding is that at around 220 F, transmission fluid starts to break down and it just gets worse from there as the temperature goes up. I'm not sure when our own light comes on, but it seems generally speaking they come on above this temperature and only after a period of time, not immediately at temp. JonDZ, YouTube AWD crossover off-roader who used to own a Subaru Forester and now owns a Honda Passport, is expounding on the importance of monitoring trans temps due to his misfortune of killing his CVT at 60k (failed seals). He'll stop the group if anyone shows their temp is too high. Of course, Mazda's have a traditional transmission, so his concerns about CVTs do not apply directly, but is the concern, nevertheless, is real? Or is it unnecessary for our transmissions? I'm looking at making a few 10k-12k ft peak climbs in Utah and Colorado this year.

Video: (57) OVERHEATED AWD. know the difference. make them last! - YouTube

[Terry @ BMS]

Normally trans temp is only a concern when towing or with really high power applications with built motors, larger turbos, etc. I just don't see it being much of a factor here.

[Incognevo]

Normally trans temp is only a concern when towing or with really high power applications with built motors, larger turbos, etc. I just don't see it being much of a factor here.

Hi Terry, I'm brand new to the forum! I drive a 2021 CX-30 Turbo P+ (27,750 odo). I've been doing a lot of reading in preparation for buying the JB4 and I just had to sign up and chime in when I saw your latest message.

I do quite a lot of towing with my CX-30. Most is around town, but June 2022 I towed a 6x12 dual axle enclosed trailer about 2,000 miles from Florida to Atlanta, GA and then west to Phoenix, Arizona. The trailer weighed in just shy of 4,000lbs. The car handled it so well I almost forgot it was behind me. Averaged 16mpg on 91/93 octane. I did not experience any transmission overheating warnings during my journey, but we did have to briefly blast the heater for 1-3 minutes on 2-3 occasions near the top of the steepest grades in NM/AZ because the engine temperature gauge would start to creep up. The ability to monitor transmission temperatures would be hugely valuable to me for towing!

I have also done 1 track day event in 2022, with plans for many more in 2023. Near the end of session 3, after 7 or so hot laps, the transmission overheating warning popped up and the vehicle went into a low power mode, so I exited the track and allowed it to cool. I was able to avoid overheating on session 4 by being a little less aggressive with the throttle. Again, the ability to monitor transmission temperatures would be highly valuable to me!

Regarding power, I currently have the Corksport SRI, Turbo Inlet Pipe, and 80mm c a t back exhaust installed. The car is considerably quicker than stock.

The question(s) I have are:
1) Is there still room for benefit from the JB4?
2) Will an engine with this level of modification (or more, d o w n p i p e is on the horizon!) still be safe to use in conjunction with a JB4 that was (presumably) tuned via a stock vehicle?
3) Being governed to 122mph sucked even when stock. Anything we can do about that?

Full Current Modification List (for anyone interested)

INSTALLED:
Corksport SRI Corksport SRI Heat Shield
Corksport Turbo Inlet Pipe
Corksport 80mm c a t back exhaust
H&R Lowering Springs
Corksport AWD Rear Sway Bar
Blitz Strut Tower Brace
Castrol SRF Racing Brake Fluid
Stoptech 308 (309?) Brake Pads (Front)
25mm Bolt-in Hub Centric Spacers
Aluminum Paddle Shifter Extensions
Corksport Rear Wiper Delete Kit
Torklift Low Profile Class III 2" Hitch

Own, Pending Install:
18x8.5" +33mm AVID1 AV20 Wheels
245/45R18 Bridgestone Potenza RE-71RS Tires
67.1 - 73.1 Hub Adapter Rings
(I will remove the bolt on spacers to install the AV20's)

ON ORDER:
Corksport 13" 4 Piston Big Brake Kit
BC Racing 32-Way Adjustable Coilovers
JB4 Tuner?!??

Track day On Board Footage:

https://youtu.be/vVqzYVXndQI

+ Pics of towing and Tail of the Dragon adventures

[Turki]

Hi, should the fuel bias be 0 or 25? it was set in my app to 25 by default while my in my friend's app it was set to 0 for some reason.

what does it do anyway?

[Terry @ BMS]

It doesn't matter with the latest firmware. The MAF profile is now hard coded by map.

[Sluggo48313]

I've read through ALL 32 pages here. I have a 2022 Mazda CX-5 Turbo with 17,000 miles on it. Only current mod is a K&N drop in filter. I want to do the JB4. Few questions....

Has anyone with a 22 or 23 CX-5 turbo done this?
Which version is it V1 or V2? Is the 2022+ any different than earlier models?
If I order it does it come with all the correct cables now?
Do you have to order the bluetooth dongle, and pay for the app in order to change between tunes?
Also, is there anyway with the "face-lifted 2022" to connect the lower sensor without removing the bumper? I think the current bumper cover is one piece? Can I get it from underneath?

I used to have a 2010 Mini Cooper S and eliminated the "muffler" on the Inter-cooler without removing the bumper cover, so I get the challenge...I was just looking for advice from someone who already did it on the current model CX-5 Turbo.

Thanks!

[Havok]

I've read through ALL 32 pages here. I have a 2022 Mazda CX-5 Turbo with 17,000 miles on it. Only current mod is a K&N drop in filter. I want to do the JB4. Few questions....

Has anyone with a 22 or 23 CX-5 turbo done this?
Which version is it V1 or V2? Is the 2022+ any different than earlier models?
If I order it does it come with all the correct cables now?
Do you have to order the bluetooth dongle, and pay for the app in order to change between tunes?
Also, is there anyway with the "face-lifted 2022" to connect the lower sensor without removing the bumper? I think the current bumper cover is one piece? Can I get it from underneath?

I used to have a 2010 Mini Cooper S and eliminated the "muffler" on the Inter-cooler without removing the bumper cover, so I get the challenge...I was just looking for advice from someone who already did it on the current model CX-5 Turbo.

Thanks!

Wow all pages! I tip my hat to you sir!
i know nothing of the cx5, but im pretty sure you need the v1.
The wiring harnesses should be shipping with the correct connectors now. The ones noted in this forum were beta releases, BMS needed to recoup RnDnM. They sold the beta hacked up harnesses (which mostly worked well) then swapped out to the correct ones once they got the right connectors.

As for the interface cable, you can get a usb, and connect to laptop (software is in a link somewhere here). But the BT to phone is much MUCH easier! I tried the usb interface and hated it.

[Caestus75]

I just bought a 2023 mazda CX-50 Turbo and I just purchased the JB4 for the platform.

I am coming from a FBO Honda Civic Type R that had Hondata on it. Any thoughts or suggestions for the CX-50? I have access to 93 octaine so does the HP and TQ gain come from the basemap of Mazda? meaning at 93 octane its 256 HP and 310 Torque, so the gains come after that? or are the gains from 87 octane?


I just purchased the CX-50 a little over a week ago and I only have 82 miles on it but I won't install the JB4 until at least 600 miles as I will likely receive it before then.

[Terry @ BMS]

Just run the best fuel you can. We always measure gains off at least 91 octane, normally 93 octane. When running below 91 the car will detune itself and that in effect will also detune all the JB4 maps.

[Caestus75]

Just run the best fuel you can. We always measure gains off at least 91 octane, normally 93 octane. When running below 91 the car will detune itself and that in effect will also detune all the JB4 maps.

Thank you for this.

I will install the JB4 once the Mazda hits 600 miles of combined stop and go/highway miles.

I did not see much information about the maps but if I recall correctly when I had the JB4 for my Honda Map 3 was the sweet spot. II did see Map 2 was for 93 Octane at +4 PSI What is our stock turbo PSI? Would Map 3 add more boost on 93 os is that limited to E85? Did I miss seeing what boost is added on what gas for the maps other than Maps 0-2 in the first post?

[Terry @ BMS]

Map2 is the most used map on the platform, and can be used with 93 or up to 30% E85. The platform is more turbo limited than your Honda was.

[Caestus75]

Map2 is the most used map on the platform, and can be used with 93 or up to 30% E85. The platform is more turbo limited than your Honda was.

Awesome. Thank you so much for the information.


I have not driven it once this week so I will install it and set it to Map 0 so I can at least get ECU readings.

Terry @ BMS

I just installed the JB4 on the mazda... on the bottom of the PDF instructions it showed that there was an intercooler connection that needed to be made... However, the cables did not seem long enough for this so I hooked it up to the MAF, the sensor below the intake tube (on page 4) and the sensor on page 2 of the PDF


The sensors seem to all be working but my concern was the bottom of the PDF where it stated

"CX specific directions: The first MAP sensor is in the engine bay in generally the same location as the Mazda3 photos above. The second MAP sensor is located on the passenger side intercooler and is quite tricky to reach. You may need to remove the bumper panel and access the sensor from under the car."


Is my install correct or am I missing something..?

[Caestus75]

Terry @ BMS my dash lit up like a Christmas tree today. I must not have the correct ports…. Can you please provide guidance?

I did not plug anything into the intercooler because I didn’t think it would reach.

Edit: Please note this is a CX-50

[Cannon @ BMS]

Please send me installation pictures and a screenshot of the codes occurring.
[email protected]
Thanks!

[sanjaycollins]

If anyone is interested I have the CS intake, CS strut bar, BMS JB4 and BMS catch can for sale from my 2021 Mazda3 Turbo.

[Shrike]

If anyone is interested I have the CS intake, CS strut bar, BMS JB4 and BMS catch can for sale from my 2021 Mazda3 Turbo.

I'm interested in your intake

[Caestus75]

Working through Tech support to isolate my issue.

[SixPackABS]

Terry @ BMS
I have my setting at Map2 and always had 93 since this car came out of dealership. I was just curious today and tried if I can hit full boost 24 psi. unfortunately I can only hit 21 psi. How come I cannot hit the 24 psi on Map 2?

[sm1ke]

Yesterday I was doing a couple pulls and noticed that boost will go up and down when accelerating. It feels like it’s cutting out in power or something. Any suggestions guys?

Were you able to get this sorted out?

[Havok]

Which part number is the air filter that comes with the intake?
Im assuming its okay to clean the filter with any "air filter cleaner" right?

[M3TAl]

If you're referring to the BMS intake it uses a Takeda TF-9025R filter. It's a 5 layer cotton oiled filter. The dry(non-oiled) synthetic version is TF-9025D.

[sm1ke]

Im assuming its okay to clean the filter with any "air filter cleaner" right?

BMS sells the S&B Filters cleaning kits on their site. On the S&B product page for the cleaning kit, they actually provide an MSDS and SDS for the oil and cleaners used in their kits, so you may be able to use this information to figure out if your cleaner can be used.