jb4

Hello just curious what everyones AFRs are at . Currently im using jb4 with a custom map and they're right around 14.5 roughly. I've read that this is normal since the ecu targets that stock.

Hi! finally got the Jb4 in. 21 supra 2.0 running on e15 same tank for both logs. Only have AWE catback exhaust. Map 2: I believe my log looks okay, but I feel like my boost peaks way too high. And is my AFR sitting in the right space or do I need to target a richer mix? Something just feel...

Hi! finally got the Jb4 in. 21 supra 2.0 running on e15 same tank for both logs. Only have AWE catback exhaust. Map 2: I believe my log looks okay, but I feel like my boost peaks way too high. And is my AFR sitting in the right space or do I need to target a richer mix? Something just feel...

Hey all, I'm selling my Burger Motorsports JB4 for the B58 / B48 / A90 Supra complete with EWG and Bluetooth wireless connector as I have recently unlocked my ECU via Femto and would like to pass this on to someone who can enjoy it. The JB4 has already been unlinked and is ready to be installed...

Jb4 for sale for Supra $400 shipped. Local to AZ I’ll let it go for $350

I have a 22 3.0 premium I have a armtrix catless dp, hks exhaust and hks carbon intake I plan on doing 93 but is it worth getting a custom jb4 map for just that. Not really tracking it, just street and driving for fun. I’m being told by other owners that’s it’s not worth that much money (500$)...

For my JB4 guys, I went out and did some testing of all the maps including map 0 (JB4 disabled) on an E36 mix. Mods: Magnaflow XMod Exhaust Eventuri Intake INJEN Chargepipe Mishimoto Heat Exchanger 4.5in Catless Downpipe JB4 My personal best I’ve gotten on map 6 is a 9.36 with a passenger...

So I posted a thread not too long ago of some logs I did while running map 5 and it wasn’t pretty, I was informed to try out map 4, here are those logs. I’m concerned with the afr’s @ColonelAdama @Jesse DaBears

I’m running e30 with a catless downpipe and mst v2 cold air intake on map 5. I started out on map 2 with 93 pump gas and everything felt smooth. Everything still feels smooth it’s just I feel like in the logs the timing is doing some weird stuff it’s kinda all over the place. I put some WOT...

For sale is the JB4 off my 3.0. Used for about 5k miles. Comes with OBDII power cable, DMD bluetooth connection kit, and EWG functionality. $400 $350 OBO shipped to the lower 48. Let me know if you have any questions!

SUPRA ULTIMATE JB4 GUIDE AND LOG REVIEW (V1) Been a busy 5 months learning nearly everything there is to know about JB4 on the B58 platform. Funny how trying to get my catless MT running right turned into countless log reviews and custom tuning on the JB4tech.com forum. As Jesse said it best...

Hey guys! First post here. I've had my 2021 Supra for about 3 months now and I've just installed a JB4 with EWG. The only modification it has right now is an Armaspeed CAI. These are my Map 1 logs. I don't think I'll be going higher than Map 1 or 2 but I also don't really know what the other...

Sold my lemon supra, no longer need it. Will ship to the lower 48. Used for about 4 months. Comes with OBDII power cable and DMD/"Wireless Smartphone Connection kit".

I have a '23 A91 MT and the JB4 is throwing this code. The description says it's high idle after cold start. I'm running map 2 at the moment and sometimes I experience what I can only describe as rpm hang? In-gear there's very little engine braking. I wonder if it's related.

Hey all, I’m entering custom settings for a jb4 map 6 tune on the iOS, however, every time I save them, it adds .1 to every Boost option except for 1500 rpm. example 1500 -3.0 2000 - 3.6 (should be 3.5 as that’s what I entered on that field in the app) 3000-4.1 (should be 4.0) 3500-4.1 (should...

I actually bought this from another forum member but I never installed it in my car. They used it for ~700 miles. I'm just not looking to tune right now. Ready for JB4 Mobile app management. Unlinked from account and ready for a new host. $375 shipped but would prefer pickup in Orange County...

Hey Guys, Has anyone run the BMS JB4 PI controller? Does this require an unlocked ECU/DME? https://burgertuning.com/products/jb4-port-injection-control-module?variant=43278733508782 Wonder Twins activate? @zrk @Jesse DaBears Thanks!

To be upfront I will not be naming the shop that I worked with as to not cause any problems if there ends up not being any. So a little backstory, I had a shop local to me that deals in race speced cars and tuning that did exhaust work, coil overs and tuning for my 2020 supra. I asked the...

Hey Folks, I've recently started tinkering and researching all things JB4. Kevin (YouTube: kern417) published a video about piecing together an ethanol analyzer which is less expensive than buying a commercial flex fuel kit which can run between $295 (Vader) - $500 (BMS/Fuel-It). Kevin...

Sold the Supra yesterday and have these parts for sale. I’m in the Orlando, FL area (Zip: 32707) if you want to meet up or pick up. Can also ship if needed but buyer pays shipping. Local preferred. Custom Carbon Fiber Steering Wheel, Flat Top and Bottom - $750 Purchased from @NitroYellowMKV...