[saiy1412]

Installed the JB4 on my CX-50, everything works flawlessly.

I have a couple questions on this platforms turbo if anyone can give me more infor to tune my map6. On my Q50 TT, there was information available on the max PSI and also turbo efficiency at certain RPM/PSI. I couldn't find any of that info for the Mazda engine.

Currently my Ign1 is still at 5 at 5k RPM, so I think I'll have some room to increased boost at those rpm.

Thank you in advance.

[cx5-sleeper]

Originally Posted by Terry @ BMS

You can just go to map2 out of the box for 93 octane.

For the BETA systems we're also going to ship with options bit7 on for Linear Gas Pedal input. The CX models more or less require it or they get boost oscillation at mid throttle positions. The Mazda3 models though can disable if they want to make the gas pedal feel "more aggressive".

Terry will the CX-5 still get boost oscillation if bit 7 is disabled?

Installed the corksport boost tube and noticed a little boost surging. Looked at my settings and linear pedal bit 7 was disabled.

Didn’t think the boost tube would really change that much, but wondering if I should do an ECU reset or if it will just adapt over the next few days?

Also for fueling I’ve been adding 2-3 gal of e85 to target approx e28 when I can. But have been topping off with PNW92 when I can’t get e85, so my fuel is going from e28 down to PNW92. Is that going to mess with my trims and should I just stick with PNW92 with no e85 if I can’t get e85 consistently?

[AH557]

Hi,
Today I noticed I hit 26.3 psi max boost briefly on map 2.
Is that safe with the stock setup? I also happen to be running 30% E85, only other mod I have installed is the borla axle back.

[Terry @ BMS]

Originally Posted by AH557

Hi,
Today I noticed I hit 26.3 psi max boost briefly on map 2.
Is that safe with the stock setup? I also happen to be running 30% E85, only other mod I have installed is the borla axle back.

Could be normal, just depends on the details/log and what the factory boost target was at that moment.

[Terry @ BMS]

Originally Posted by cx5-sleeper

Terry will the CX-5 still get boost oscillation if bit 7 is disabled?

Installed the corksport boost tube and noticed a little boost surging. Looked at my settings and linear pedal bit 7 was disabled.

Didn’t think the boost tube would really change that much, but wondering if I should do an ECU reset or if it will just adapt over the next few days?

Also for fueling I’ve been adding 2-3 gal of e85 to target approx e28 when I can. But have been topping off with PNW92 when I can’t get e85, so my fuel is going from e28 down to PNW92. Is that going to mess with my trims and should I just stick with PNW92 with no e85 if I can’t get e85 consistently?

Since we've added MAF control revisions in v4 the pedal mapping has not been needed to smooth them out at part throttle. But you can always email me a log if you're having an issue and I'll review.

The tuning is very sensitive to MAF flow and intake design we've found.

[cx5-sleeper]

Originally Posted by Terry @ BMS

Since we've added MAF control revisions in v4 the pedal mapping has not been needed to smooth them out at part throttle. But you can always email me a log if you're having an issue and I'll review.

The tuning is very sensitive to MAF flow and intake design we've found.

Cool, thx. Did a road trip this weekend with map 2 and bit 7 disabled and it performed great.

[Turki]

Hi, is the v5 firmware suitable for mazda 6? I updated to v5, i dont think maf temp works on ign6 channel since it shows 10.9, for IAT_temp it shows higher temps than trans temp with about 35F difference, (IAT_Temp was 150F while Trans temp was 115F). Shouldn't post intercooler temp be lower than pre intercooler? Btw ambient temp is 108F, at night.

[tymwalk]

Originally Posted by Turki

Hi, is the v5 firmware suitable for mazda 6? I updated to v5, i dont think maf temp works on ign6 channel since it shows 10.9, for IAT_temp it shows higher temps than trans temp with about 35F difference, (IAT_Temp was 150F while Trans temp was 115F). Shouldn't post intercooler temp be lower than pre intercooler? Btw ambient temp is 108F, at night.

There is no pre intercooler temp for the Mazda 6. Remember how the jb4 is different for the 6 than the 3. So ign 6 is MAF but needs to be multiplied by 10. It is scaled that way because it expects a timing value. The trans temp is post intercooler and the iat is the manifold. Follow your map connections

[Terry @ BMS]

Originally Posted by Turki

Hi, is the v5 firmware suitable for mazda 6? I updated to v5, i dont think maf temp works on ign6 channel since it shows 10.9, for IAT_temp it shows higher temps than trans temp with about 35F difference, (IAT_Temp was 150F while Trans temp was 115F). Shouldn't post intercooler temp be lower than pre intercooler? Btw ambient temp is 108F, at night.

The values on the 6 may be different, post up a log and lets check it out.

[Terry @ BMS]

Originally Posted by cx5-sleeper

Cool, thx. Did a road trip this weekend with map 2 and bit 7 disabled and it performed great.

[Turki]

Originally Posted by Terry @ BMS

The values on the 6 may be different, post up a log and lets check it out.

Sorry for the late response, logs sent to ur Email.

[Slojedi]

Works great!

[tymwalk]

Enjoying the minor benefits of water methanol injection being controlled by the JB4 on my 2021 Mazda CX-5 Turbo

-Lower intake manifold temperatures
-Constant fuel trims
-Lower ign 2 values

The IAT is the intake manifold and the Transmission Temp is the post intercooler temperature.

[9520G]

Originally Posted by tymwalk

Enjoying the minor benefits of water methanol injection being controlled by the JB4 on my 2021 Mazda CX-5 Turbo

-Lower intake manifold temperatures
-Constant fuel trims
-Lower ign 2 values

The IAT is the intake manifold and the Transmission Temp is the post intercooler temperature.

Seems like you should be working for BMS, did you piece tidget a kit and where are you running the reservoir?

[tymwalk]

Originally Posted by 9520G

Seems like you should be working for BMS, did you piece tidget a kit and where are you running the reservoir?

You can check out the build here. WMI - JB4tech.com - International Turbo Tuning Discussion