JB4tech.com - International Turbo Tuning Discussion
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FckFiat FckFiat is offline
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Default 06-02-2022, 11:52 AM

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.
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IanCH IanCH is offline
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Default 06-09-2022, 10:30 AM

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.


2020 GTI
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FckFiat FckFiat is offline
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Default 06-10-2022, 06:33 AM

Quote:
Originally Posted by 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.
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.
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IanCH IanCH is offline
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Default 06-10-2022, 06:38 AM

Quote:
Originally Posted by FckFiat
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.


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FckFiat FckFiat is offline
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Default 06-10-2022, 08:26 AM

Quote:
Originally Posted by IanCH
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.
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IanCH IanCH is offline
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Default 06-10-2022, 08:36 AM

Quote:
Originally Posted by FckFiat
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.


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Default 06-10-2022, 01:28 PM

Quote:
Originally Posted by IanCH
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.
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Terry @ BMS Terry @ BMS is offline
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Default 06-15-2022, 02:00 PM

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.


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WhiteTypeS WhiteTypeS is offline
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Default 06-22-2022, 10:34 AM

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.
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Default 06-29-2022, 11:25 PM

Let me know when youíre ready put a Type S back on the dyno. Iíve been running map 4 on E30 and Iíd like to see what numbers Iím putting down.
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Default 07-03-2022, 11:52 AM

Quote:
Originally Posted by 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.
It's not something we touch currently but maybe down the road.


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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