JB4 for Acura TLX TypeS Dyno Testing

[FckFiat]

Would the JB4 be able to adjust on the fly for potential knock? Im finishing up a custom short ram this weeked, just waiting for the MAF flange to be delivered. There's a slight size increase over the stock intake piping diameter where the MAF sensor will be located.

[IanCH]

I just ordered my JB4 for the MDX Type S and I am looking forward to using it.

Curious, in every log I have seen the IAT's are very flat, barely moving. Is this correctly recording?

It would seem that the cooling is quite excellent on these powerplants.

[FckFiat]

I just ordered my JB4 for the MDX Type S and I am looking forward to using it.

Curious, in every log I have seen the IAT's are very flat, barely moving. Is this correctly recording?

It would seem that the cooling is quite excellent on these powerplants.

no reason for IATs to bounce around a lot unless you're sitting at a red light, then it'll probably climb a tad. I took my stock air box out and my IATs went up about 8-10 degrees since I'm pulling much more engine bay air in. I'm in the process of fabricating a cool air box for it.

[IanCH]

no reason for IATs to bounce around a lot unless you're sitting at a red light, then it'll probably climb a tad. I took my stock air box out and my IATs went up about 8-10 degrees since I'm pulling much more engine bay air in. I'm in the process of fabricating a cool air box for it.

I am talking about during a pull, and yes IAT's should increase as you go through each pull at full throttle and then cool back down. I guess the answer is that the IAT being shown in the logs is not post intercooler since it never changes.

IAT at the air intake is useless information, as what you want to know is the air temperature going into the engine.

Still interested to know if anyone knows how the stock intercooler is performing for JB4 map 2 or 3.

[FckFiat]

I am talking about during a pull, and yes IAT's should increase as you go through each pull at full throttle and then cool back down. I guess the answer is that the IAT being shown in the logs is not post intercooler since it never changes.

IAT at the air intake is useless information, as what you want to know is the air temperature going into the engine.

Still interested to know if anyone knows how the stock intercooler is performing for JB4 map 2 or 3.

i dont know, I'd think IATs would stay consistent regardless of if you're making a pull or not. maybe a slight increase from the turbo heat but the intercooler would cool faster as more air is pushed through it on the ambient side.

I think it gets its temp reading fromt the MAF sensor which is pre turbo/intercooler.

[IanCH]

i dont know, I'd think IATs would stay consistent regardless of if you're making a pull or not. maybe a slight increase from the turbo heat but the intercooler would cool faster as more air is pushed through it on the ambient side.

I think it gets its temp reading fromt the MAF sensor which is pre turbo/intercooler.

Thats not what I am saying, yes IAT at the intake stays constant but it is not telling you anything more than the temperature outdoors.

what you need to know on turbo cars is the IAT to the engine, post turbo and post intercooler. On my Mk7 GTI, R, and S5 the IAT reading on the JB4 spit out this temperature.

[FckFiat]

Thats not what I am saying, yes IAT at the intake stays constant but it is not telling you anything more than the temperature outdoors.

what you need to know on turbo cars is the IAT to the engine, post turbo and post intercooler. On my Mk7 GTI, R, and S5 the IAT reading on the JB4 spit out this temperature.

I don't know if there's a sensor post intercooler that the JB4 can grab a signal off of, unless the MAP sensor can do that. I havent taken the TLX one off to know if there's a thermistor in one.

[Terry @ BMS]

We always try to grab charge air temperature but the ECU doesn't always make that easy. Next time we have a TLX in the office we'll double check that.

[WhiteTypeS]

I've had my Type S for about 2 weeks now and itching to start my build. Question - Does the JB4, or is there a setting, to shut off the dang VCM? The car is my daily, so when in "comfort", i dont want the VCM always kicking in and out.

[Tlexess]

Let me know when you’re ready put a Type S back on the dyno. I’ve been running map 4 on E30 and I’d like to see what numbers I’m putting down.

[Terry @ BMS]

I've had my Type S for about 2 weeks now and itching to start my build. Question - Does the JB4, or is there a setting, to shut off the dang VCM? The car is my daily, so when in "comfort", i dont want the VCM always kicking in and out.

It's not something we touch currently but maybe down the road.

[Kazsmir]

Any plans to adjust the shifting in the higher power maps? I’ve tested 3, 4, and 5 with a roughly ~E40 mix (8g E85/~70%e and 7g 93/~10%e) and experienced some stumbling on throttle on in Map 5, and delayed shifting in Maps 3, 4, & 5. It’s like it slip shifts, attempting to protect the transmission but it’s quite jarring. For drivability I tend to keep the car in Map 3 or 4. Just curious if this is something that will be smoothed out in future Map releases or if this is something I’ll have to have custom tuned?

[Terry @ BMS]

Any plans to adjust the shifting in the higher power maps? I’ve tested 3, 4, and 5 with a roughly ~E40 mix (8g E85/~70%e and 7g 93/~10%e) and experienced some stumbling on throttle on in Map 5, and delayed shifting in Maps 3, 4, & 5. It’s like it slip shifts, attempting to protect the transmission but it’s quite jarring. For drivability I tend to keep the car in Map 3 or 4. Just curious if this is something that will be smoothed out in future Map releases or if this is something I’ll have to have custom tuned?

We didn't have any issues on our end, but you can try tweaking the fuel bias values, which control the MAF offset, to see what impact they have. Some cars prefer lower values.

[Hifonix]

Do you have updated link to:
BMS data cable hard wired directions&software, link is broken since forum update

[TlxEvan]

Hey I’ve recently bought the jb4 and seems to run somewhat lean afr peaks around 17/18 on map 2 in sports+ at peak boost I’ve also have had hiccups between first and second gear not sure if anyone is active to look at logs or anything but I’ll take a few tomorrow.

[MrM2U]

I'm having similar problems with my mdx. The shifts are almost like a brief stall in map 1, 2, and 3 for me. Earlier, the 1 to 2 shift went into protect or something and the whole car fell on its nose, losing all power until I let up on the gas pedal. I've tried both 91 and 93 octane gas... Not sure what to do.

[caLiTLX-S]

Has anyone had success figuring out the hiccup issues when under WOT and prior to redline? I’ve had this problem intermittently and tried changing the fuel bias values, but again, the issue is still intermittent. It feels as if the car falls flat on it’s face but I wonder if it’s gracing the redline, however, these vehicles automatically upshift so it’s not possible to bounce off the limiter.

[Terry @ BMS]

Post a log if you need tuning advice.

[caLiTLX-S]

Post a log if you need tuning advice.

Here's a few logs for your review. You can see in some instances the boost drops drastically in between ****s, but primarily in the 2-3 gear shift and not the upper gears. Your thoughts?

[caLiTLX-S]

Terry @ BMS see previous post; still looking for feedback.

[Steve @ BMS/Fuel-It!]

Terry @ BMS see previous post; still looking for feedback.

Best to email him at [email protected] with these but boost dropping at the shift is not uncommon. That's what makes the pshhhh sound and you can see the ECU_PSI drops as well. Since this is an additive map, JB4 boost target will drop as well.

[jozhfy]

Here's a few logs for your review. You can see in some instances the boost drops drastically in between ****s, but primarily in the 2-3 gear shift and not the upper gears. Your thoughts?

let me know how it goes, i do have this, for me its on all maps but map1 seems to do it less, its scary ash, hard shifting too

[caLiTLX-S]

Unfortunately I still have the issue; it’s intermittent but still there. I tried adjusting the fuel bias on the user adjustments settings, but haven’t found the correct values that alleviate the issue.

I’ll have to send some logs for review and support to see what the root cause is. But from reading these forums, it looks like other users have experienced the same issue.