Seeking more info on JB4 Map 6 tuning

[ColonelAdama]

"You can't seriously believe you understand the JB4 better than its inventor right? You understand the quirks related to this single platform, and withhold that info for an easy buck."

LOL ok...

I was honestly going to help steer you in the right direction but since you still want to throw shade have fun. You guys arent even close the getting to the real issues. Wait utill you actually try pushing more than what 1-2 psi over stock....

Send me a DM if you cant be a man on the forum and just ask for help nicely and be a little humble. I do way more of these cars than anyone. I did do custom maps for free and ask to be just tipped but when people were sending me 20 bucks for hours of work I said fuck that. There's a demand for the service you want to knock me for doing it but yet you cant even figure it out with the help of BMS.

Where am I not being humble? At what point did I claim to know better than you?

I mean, I agree that its fucked to get paid 20 for hours of work - but cmon man, ~600 or whatever it is? Even your toughest cars, that's hundreds of dollars an hour to look at logs. The cost comes from trade secrets, not your time. That's why I'm "throwing shade".

It's just weird to frame me as the bad guy for trying to help BMS dial in their product so people don't have to fork over another 600 when their OTS maps suck. Yeah, I've been snarky, but I've also spent a lot of time learning and trying to help the community for free. The folks on here are friends, not customers to me.

There's still a market for your service, either way. Very few people are going to try what I'm doing.

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[Jesse DaBears]

Where am I not being humble? At what point did I claim to know better than you?

I mean, I agree that its fucked to get paid 20 for hours of work - but cmon man, ~600 or whatever it is? Even your toughest cars, that's hundreds of dollars an hour to look at logs. The cost comes from trade secrets, not your time.

It's just weird to frame me as the bad guy for trying to help BMS dial in their product so people don't have to fork over another 600 when their OTS maps suck. Yeah, I've been snarky, but I've also spent a lot of time learning and trying to help the community for free. The folks on here are friends, not customers to me.

There's still a market for your service, either way. Very few people are going to try what I'm doing.

It honestly doesnt matter if to me if you come up with a new OTS map the thing that i keep trying to explain is there will never be a one size fits all map for these cars.

Lets see a log from map 6. Email it to [email protected]. Ill try and steer you in the right direction but you are very right about one thing. I do enough that I do have "trade secrets" (i call it learned knowledge from doing so many of these cars) and im not just going to explain everything to you, but will try and steer you down the right path.

 

[ColonelAdama]

It honestly doesnt matter if to me if you come up with a new OTS map the thing that i keep trying to explain is there will never be a one size fits all map for these cars.

Lets see a log from map 6. Email it to [email protected]. Ill try and steer you in the right direction but you are very right about one thing. I do enough that I do have "trade secrets" (i call it learned knowledge from doing so many of these cars) and im not just going to explain everything to you, but will try and steer you down the right path.

I would really appreciate any help you have to offer. Let me get some better logs and I'll send your way.

 

[Jesse DaBears]

I would really appreciate any help you have to offer. Let me get some better logs and I'll send your way.

If possible do as long of one as you can. I know its hard most times but a 2nd into full 3rd and some of 4th would be great. As well as a full 3rd gear.

 

[Jesse DaBears]

I was going to respond to your email but figured I'd share it here.

Hey Adam,

So a few things I noticed. I will show examples from a MT car I worked on and your logs you sent me.

1 - The B58 uses throttle to regulate boost so when you are getting to target or over target the throttle will start to fluctuate as its anticipating the need to slow air flow down to keep it within targets.

• So when working on a MT its KEY to keep boost levels below your targets. You do this by adjusting boost values along with WGDC.
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• Focus on pink (target) blue (boost actual) and black (ECU PSI)
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• Here is a log from when I was dialing this car in, you can see as soon as boost got to and above targets look what happens to throttle it closes creating that oscillation feeling.

2 - You mentioned in the forums about keeping FF and WGDC close as possible to each other, that is correct on autos but not so much on MTs.

3 - Your Requested boost is equal to your ECU PSI request at times thats always going to cause issues. There is a clear way to help with this using the JB4.

• Here you can see ECU PSI request goes above my actual boost but the throttle still stays open.
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• You will notice in your logs as soon as yours does it goes to crap quick.
• Here is a picture of your log
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• 

4- Your single gear sweep was ok, needs some work but take the above into consideration when reviewing your two logs side by side. You should be able to spot what I'm telling you and make adjustments. If you can not PAYPAL READY

Here are pictures of multiple logs from MT cars that you can see the throttle is staying wide open.

Here's a log of the very first MT car I did. Looks familiar to your logs where I tried keeping FF and WGDC right on top of eachother, where I couldn't make the car to accept more boost over ECU PSI request without it freaking out, where timing would just crash right away. .... Did not work HINT*

I will note MTs are extremely frustrating but you have to keep making adjustments in the right direction and it can be done.

Thank you for contacting us. Please let me know if you need anything else.

Regards,
One Fast Supra
[email protected]
www.1FastSupra.com

 

[Evolution]

@Jesse DaBears going over and beyond like normal. It's nice to see how many of our forum sponsors actually care about the community.

 

[FLtrackdays]

@Jesse DaBears going over and beyond like normal. It's nice to see how many of our forum sponsors actually care about the community.

This

 

[FLtrackdays]

Also I’ve purchased other things besides a custom tune from Jesse at 1FastSupra.com, something I wasn’t happy with, he just said no problem I wouldn’t like that either and sent me another. I think it was my little decorative wing (can’t remember honestly). But he’s fantastic to deal with! So I’ll keep buying stuff from him over others if he has what I’m looking for.

I’m also confident he can do whatever I want with my JB4 catless downpipe Map 6. He made my car so damn fast it’s ridiculous. We were going to work on a track map but I just got so damn busy, aka life. Sorry I haven’t given @Jesse DaBears a shout about it. But I know when I do have time, he’ll be cool as hell about it. I trust him over the manufacturer any day. I can turn off the map and my catless downpipe has no problems on track whatsoever.

I also appreciate what @ColonelAdama is trying to do. I haven’t kept up with your guys previous post. But Jesse is a huge asset to all of us. The Supra (computer/sensors) are sensitive a shit. Yet somehow Jesse knows how to calm her down, stop my codes from throwing and push her harder, smoother, safely - if anyone decides to go the JB4 route. He is what makes that product even better, for us Supra owners.

It’s just my dumb opinion but a cheap way to feel like I’ve got a Batmobile button with a Jesse tuned Map 6. His custom map is legit

 

[ColonelAdama]

@Jesse DaBears going over and beyond like normal. It's nice to see how many of our forum sponsors actually care about the community.

Have to agree with you there. The information he provided was above and beyond for detail. Big Props to @Jesse DaBears for putting in considerable effort to share with us DIYers. And if you aren't a DIYer, his custom tuning service can get your car sorted out perfectly.


We really appreciate it!

Cheers, and apologies for prior frustrations.

 

[D K]

Just as an aside, it's much easier reviewing logs from a desktop PC than your phone/tablet. Or trying to figure out what the hell everything means on the log files in Excel/Sheets.

Do yourself a favor and download the JB4 desktop app:
https://www.jb4tech.com/forum/model...eview-ab/138-jb4-laptop-connection-directions

 

[ColonelAdama]

Been having some good luck using Jesse's advice. 19psi flat with no throttle closures after some logging today on Map 5 with FF/WGDC tuning to achieve an underboost (boost < target). Now I can switch to Map 6 and start raising the target and redoing FF tuning. Trims may be a limiting factor here.

 

[ColonelAdama]

Been having some good luck using Jesse's advice. 19psi flat with no throttle closures after some logging today on Map 5 with FF/WGDC tuning to achieve an underboost (boost < target). Now I can switch to Map 6 and start raising the target and redoing FF tuning. Trims may be a limiting factor here.

As expected, trims are way too high. Struggling to exceed 20psi on this E30 blend without trims maxing out and causing more throttle closures. Since I have to underboost so much, ECU_PSI is way too low, indicating to the car that fuel demand is low (when its not). I'll just have to lower my targets <5000rpm, compared to an AT car.

That... or I switch back to 93 only and comfortably run 20 psi (targeting ~22).

 

[ColonelAdama]

Editing this post after a VERY successful logging session today.

Wrap up the thread! I've finally got a smooth map 20psi 3k-6.5k pulls without throttle closure. Trims are still a little high but not enough to cause issues. just kidding, they are! still have issues.

The missing piece was PID gain. Terry at BMS just said this morning "turn it off, set to 0". Like magic. I feel like i can finally enjoy the car.

 

[AJRMKV]

Editing this post after a VERY successful logging session today.

Wrap up the thread! I've finally got a smooth map 20psi 3k-6.5k pulls without throttle closure. Trims are still a little high but not enough to cause issues.

The missing piece was PID gain. Terry at BMS just said this morning "turn it off, set to 0". Like magic. I feel like i can finally enjoy the car.

how does the car feel now?

 

[ColonelAdama]

how does the car feel now?

Unfortunately, some days it still has the throttle closures. Like a few maps I've tried, I got it working, then it was back to throttle closures/DME_BT drops on the next drive.

I am working with Terry at BMS to get a custom JB4 board with fuel control to manage my trims issues that I discussed earlier. He's shipping it to me this week.

You can see from an earlier post that my smoothest map at 18-19psi is trim-limited. Usually when trims exceed 45, the DME pulls back its boost request sharply which just completely throws off the JB. It seems impossible to use Jesse's technique of underboosting 2-3psi without my trims being 45+. If I underboost less, I get the same throttle closures I started with.

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