JB4 for Alfa Romeo Giulia

[Terry @ BMS]

Latest firmware has all previous changes. You can email logs to yourself and attach to posts that way.

[08fordgt]

All of these were after i checked the torque on my full exhaust system, and did a complete check of my engine bay including moving my jb4 to a different spot and wrapping it just in case it was causing false knock.

[08fordgt]

another pull. I guess the other two log files are too large for me to post.

[Terry @ BMS]

Logs seem fine to me. What's the fuel/mods?

[08fordgt]

93 octane. Eurocompulsion V2 intake, supersprint sport exhaust, and a turbosmart diverter valve. So IGN 2-5 are good even though they're showing positive or will they go negative if they were knock? I'm still trying to piece together how to properly interpret your systems measurements. Thank you.

[Terry @ BMS]

There are always going to be some timing corrections by nature of the dynamic timing system which continually rides the knock threshold for increased fuel efficiency. Even at WOT. What we'd be looking for is excessive corrections indicating a plausible timing curve for the octane and boost profile is not possible. Then you know you need to lower boost and/or increase octane.

[08fordgt]

Awesome. Thank you for the explanation.

[Tekgnome]

Good morning Terry,

I'm reaching out as I've been developing a hybrid turbo with NM Turbo and its finally finalized. This means there are now two solid options for people to buy hybrid turbo's for our platform. (NM Turbo, and GotTuned)

I was wondering if it was possible to work with you to develop a user selectable Map to make it easier for others to run a JB4 with a hybrid unit. (bhvrdr) has been running a JB4 with his hybrid on a custom map with great success.

On a second note, I have also been wondering if it would be possible that the JB4 in the future will add a third signal intercept to allow us to adjust fuel pressure, there's a system(who's name wont be mentioned here) that can do this already, and it would be nice it we could as well. (as far as I can tell this isn't really necessary and is more of a nice to have than a need)

Thank you for your time.

[Terry @ BMS]

Sure send in a log and we can evaluate it. The plan for these is for o2 sensor control to attenuate trims and air/fuel ratios. Fuel pressure only gives you fuel trims which isn't a factor on the platform.

[Tekgnome]

02 sensor control would be fantastic!

I'll need probably a couple of weeks to get time to install my Hybrid and ******* ********. I have MES and can also provide any logging necessary with the JB4 as well.

Not sure why it censored my ***? I guess emissions talk isnt allowed here, I cant seem to find the forum rules.

[Terry @ BMS]

Yes can't discuss bypassing emissions equipment as it's illegal in the USA. But no problem on tuning.

[ddaversa]

Updated info?

Hey everyone / Terry,

new to this particular forum because I just got a Stelvio for my wife, but I've been at it with my Stinger for 2 years now, so I know how the JB4 works...

I read each and every post in this forum so far, and I'm left wondering where does the JB4 stand for the Alfa Romeo 2.0L ? I know the 1st post is always kept up to date, but I also noticed the graph seems to say only about 25 hp gain, though the page says 40 whp (55 crank), so I'm confused. I can't seem to find fuel requirements for the maps.

I'm going to buy [today] the jb4 and the performance intake. Going to run it on 91 octane, but I could also get 94 (w/ 10% ethanol). Which map should I go with? Does anyone recommend any other performance mod?

Kind of exciting if I can bump this to a theoretical ~340HP, pretty impressive power in the end!

TY!

[Terry @ BMS]

Most likely map1 is the best fit but log it and we can always review.

[JeFizz]

Terry @ BMS Is post # 1 up to date?

[JeFizz]

Also, I've upped a few of the values from bhvrdr's Map 6 settings, and it looks like I may be getting a tad bit of knock, but honestly, I don't know what the ign2-5 values mean.

No rush, but here's the log for review...

[ddaversa]

I too am also wondering if post Home is updated ... quite frankly I'm a bit disappointed at how silent things are for the Alfa Romeo platform, I got my JB4 in June but I still have not installed it, because can't find a "clean" way to do so in my Stelvio. I refuse to have a wire pass by the door frame, and I have not found a way to pass it discreetly yet. Definitely not the same level of commitment that I saw from the KIA Stinger community ... then again, not the same market at all.

[ML84]

There's a hole on the driver side near the brake reservoir. IIRC there's a little rubber plug you have to pull, then punch out the perforated foam hole on the interior side in the foot well. Once you've routed the wire that goes to the OBD2 port, put the plug back in to seal the hole with the wire through it.

[ddaversa]

There's a hole on the driver side near the brake reservoir. IIRC there's a little rubber plug you have to pull, then punch out the perforated foam hole on the interior side in the foot well. Once you've routed the wire that goes to the OBD2 port, put the plug back in to seal the hole with the wire through it.

No way! I've looked many times, couldn't find that. I will try again today. If you're right, I'm buying you a beer.

[JeFizz]

I too am also wondering if post Home is updated ... quite frankly I'm a bit disappointed at how silent things are for the Alfa Romeo platform, I got my JB4 in June but I still have not installed it, because can't find a "clean" way to do so in my Stelvio. I refuse to have a wire pass by the door frame, and I have not found a way to pass it discreetly yet. Definitely not the same level of commitment that I saw from the KIA Stinger community ... then again, not the same market at all.

Interesting, as there is info in this topic and also on the Giulia forums, that talk about the gromet. I used a nice and sharp pointed knife to poke a hole/ cut a slit in the grommet without having to remove it. I did that from the inside. Then from the outside, just jamb the plug and cable through that grommet. If you can't get to the grommet from the outside, use a pull wire fed from the inside.

[ML84]

No way! I've looked many times, couldn't find that. I will try again today. If you're right, I'm buying you a beer.

This should help. The interior grommet is above the dead pedal. After it goes through the firewall, I ran the wire along the chassis brace near the firewall to the JB4 harness. Enjoy a beer for me when you're finished with the install. Should take <5 minutes to route the wire and plug it into the harness.

[sean]

I am in China. My car is Giulia 2017 200hp. It uses 95RON gasoline and BMC air filter element. Other equipment is original. I updated the JB4 program today, the version number is JB4_ P29_ ALFA_7_T9.hex beta program, using map2. The attachment is a log data. I don't know whether it works properly. Please check it with the help of experts. Can I continue to use this beta version and map2? Any other suggestions? I feel that JB4_ P29_ ALFA_ 7_T9.hex's map2 program is more powerful than JB4_ AlFA_ 5. Hex. Thanks so much.

[Evan Nieters]

What is the optimal octane amount for Map3. Also is there any way i can get a custom tune written to clean up my timing??

[Cannon @ BMS]

Post a log here and I will check out your map 3.

[Evan Nieters]

This is 40-90 on map3 in dynamic driving mode with 93 octane. Since this log I have removed my TurboSmart BOV because it kept giving engine code p0033 which would force my car into limp mode. I'm not sure if the BOV has anything to do with the AFR or the timing or maybe was causing a boost leak. If you'd like I can go write a new log with the factory blow off installed. Just let me know what kind of logs youd like and ill get them sent over to you within a few days. Thank you for reaching out and offering your help!

[BenWilson]

The install guide/links in the first post all appear dead. Does anyone have a current install guide? Thanks!

[Cannon @ BMS]

Please upload the log CSV files for proper review.
Thanks

[Cannon @ BMS]

Please upload a log using 100% pedal input throughout the entirety of the log.

[Cannon @ BMS]

Please upload a comparison log on map 0. Thanks!

[Terry @ BMS]

Terry @ BMS Cannon @ BMS

Hey guys on the jb4 for the 2.0t Alfa you have 2 logging options for the turbo: boost (pre boost ) and boost 2 .

is one reading boost from the map and the other reading it from the boost sensor ?

thank you

Correct

[B15hop]

Hi Terry @ BMS I Just installed the new JB4 on my a2.0 giulia Veloce 2.0 .

Terry Im a little puzzled as I reviewed every body’s logs on here and everyone seems to boost around 20psi on stock for average before adding map1 etc. But I just did some logs on map 0 before I go and doing map 1 or map 2 and I noticed I average around 23.5-24 psi on the stock map 0 so am I even able to run map1 or map 2 the 2023 is advertised as the same hp as the previous years so why am I boosting so much more stock and am I gonna be safe even running just map 1?


thanks

Ambient temps in Georgia rite now are 67*. And my elevation is around 1100ft in the city here.

Any ideas ?

I just purchased the same car as well and purchased the JB4 kit last night. I’d really love an answer to this.
Ty.

[B15hop]

upload and post your log and either Terry or one of his guys will review it . They don’t comment here much anymore but when they do it’s primarily to review logs so post them and they check ‘em out . I recommend in 4th gear do a run from like 2200 - 5500 in both map 0 ( stock) and map 1 so they can compare Apple for apples

I’ve been working with Terry in emails. We installed this in my wife’s 2022 Alfa Romeo Giulia Veloce and we got at least 5 pounds of boost additional over stock and you can feel it. Absolutely worth the install. We just put a few gallons of E85 in it as well. Terry recommended 3 gallons for starters.

[Giulia101]

Is there no longer a Map 3?

[Cannon @ BMS]

Is there no longer a Map 3?

What makes you say that?

[Giulia101]

What makes you say that?

In the original post, Map 3 says “unassigned”.

[Cannon @ BMS]

In the original post, Map 3 says “unassigned”.

My apologies, yes you are correct. Map 3 is not in use.

[sean]

Can I both flash Squadra tuning ECU and use JB4？I have a try and found more power. I use 98 RON, and JB4 stable version map1. I think the beta version of JB4 map2 has better power, but I am currently hesitant to try it out.

[Terry @ BMS]

The platform is turbo limited so what you gain on top of the flash with a JB4 would depend on the flash and octane. Once flashed log map0 and email it in if you want me to check it out.

[sean]

The platform is turbo limited so what you gain on top of the flash with a JB4 would depend on the flash and octane. Once flashed log map0 and email it in if you want me to check it out.

Thank you very much, Terry. I have now flashed Squadra tuning. I will try different Octane and JB4 maps, record the logs, and send them to you for me to check later.

[SteveR]

Hey JB4 team Terry @ BMS
Big fan of the product; second car with JB4.
I’m new to tune and turbos and trying to learn and maximize performance potential…
Last week we communicated via email some of the logs, and the car feels great.
However, I recently deleted the resonator and installed an exhaust bypass cutout.
When closed, the car feels good and pulls hard.
When the exhaust flap is open and going WOT, it feels weaker, like a lot is left on the table.
I wanted to see if you can take a look at some logs and see if I’m imagining it or if there is something that could be updated to compensate.

2018 Giulia 2.0t
BMS Intake
Electronic Exhaust cutout bypass
Resonator delete
93 Octane
P29_M1_R3_230504_1359.csv
P29_M2_R2_230504_1506.csv

[Cannon @ BMS]

I wouldn't recommend turning it up anymore on this current setup.