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ralphie1313 ralphie1313 is offline
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Default 01-03-2018, 05:32 AM

Quote:
Originally Posted by g0t2bmiirii
In my experience I did with laptop while it was connnected to the car jb1
ok thanks, I don't have a laptop that's why I asked.
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(#1902)
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g0t2bmiirii g0t2bmiirii is offline
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Default 01-03-2018, 07:02 AM

Quote:
Originally Posted by ralphie1313
ok thanks, I don't have a laptop that's why I asked.
Download the jb4 app, you should be able to do it with that


2017 Q50 3.0t Silver Sport (AWD)
-LDP
-Megan Racing Y-Pipe
-TopSpeedPro Mid-Pipe (resonated) exhaust
-BMS Cold Air Intake
-JB4 (map 6) w/Fuel Wires (93oct)
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(#1903)
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jrobohm jrobohm is offline
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Default 01-03-2018, 09:17 AM

Quote:
Originally Posted by ralphie1313
does the map change have to be done on the car, lets say u wanted to take off the jb1 and connect it to your pc in the house can u do that or u have to have a laptop and it has to be done while plugged into the car? thanks
The JB1 or JB4 units need to be powered up (e.g. attached to the car and the car powered up / turned on) in order to update them. That is why the JB4 BT Kit has proven to be very convienent for people who want to do frequent logging / Map changes. I tend to run an E30 fuel blend but when E85 is not available I need to back off my boost to accommodate for the lower octane of straight 93 fuel. Not having to grab a cable, pop the hood, fire up my laptop, make then Map change then pack up everything made the investment well worth it IMHO.

Last edited by jrobohm; 01-03-2018 at 09:18 AM.. Reason: Typo
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Awgd8 Awgd8 is offline
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Default 01-03-2018, 10:45 AM

I did get a chance to drive around town on the JB4 Map 1 (+4 psi)
I’m not sure what’s the setting on the 1500-2000 RPM?
I still prefer the stock psi (SS) setting around this RPM band.

I just don’t like seeing the Turbo boosting at 1PSI while I’m just cruising.
Just unneccessary wear to the turbo. Maybe at 2.5k RPM I can increase the boost.
I’ll probably have to set my Map 6 this way.

1k-2k 0 boost added to stock.

What do you guys think?

It is also nice if the creator of the JB4 app has a quick access of map changing from the front screen and not to toggle on the setting while driving.
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GSORS400 GSORS400 is offline
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Default 01-03-2018, 12:11 PM

I may have misinterpreted your last comment. If you are asking how to quickly switch between maps, You can toggle to different maps while on the display screen by tapping the map dial 3x on iPhone, I think 2x on Android.
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jrobohm jrobohm is offline
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Default 01-03-2018, 12:54 PM

Quote:
Originally Posted by GSORS400
I may have misinterpreted your last comment. If you are asking how to quickly switch between maps, You can toggle to different maps while on the display screen by tapping the map dial 3x on iPhone, I think 2x on Android.
See image capture - your selection of what the JB4 app shows is customizable - this is what I have selected and I just triple tap the Map area on the screen to bring up a drop down of which Map to select from (the active one is checkmarked.)
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(#1907)
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Cdubber9 Cdubber9 is offline
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Default 01-03-2018, 01:12 PM

Quote:
Originally Posted by jrobohm
See image capture - your selection of what the JB4 app shows is customizable - this is what I have selected and I just triple tap the Map area on the screen to bring up a drop down of which Map to select from (the active one is checkmarked.)
Woah, Where did you get that gauge display? I only have default and needle fill options...
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Awgd8 Awgd8 is offline
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Default 01-03-2018, 01:47 PM

[QUOTE=GSORS400;573286]I may have misinterpreted your last comment. If you are asking how to quickly switch between maps, You can toggle to different maps while on the display screen by tapping the map dial 3x on iPhone, I think 2x on Android.[/QU

Thanks’ man! It works 3 taps for the iPhone.

I switched to Map2 (+5PSI) and I’m no longer boosting at 1psi while cruising at 2k rpm. Which is good! Map 1 (+4 PSI) seems to have a higher boost setting around 1.5-2k RPM. I’m not really sure.
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Awgd8 Awgd8 is offline
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Default 01-03-2018, 01:49 PM

Quote:
Originally Posted by jrobohm
See image capture - your selection of what the JB4 app shows is customizable - this is what I have selected and I just triple tap the Map area on the screen to bring up a drop down of which Map to select from (the active one is checkmarked.)
Yes, it works!

I知 on map 5 now and still not totally flooring the pedal yet, but I could hit 80 MPS effortlessly!
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Awgd8 Awgd8 is offline
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Default 01-03-2018, 01:51 PM

Quote:
Originally Posted by Cdubber9
Woah, Where did you get that gauge display? I only have default and needle fill options...
It is in the setting ...
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Cdubber9 Cdubber9 is offline
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Default 01-03-2018, 02:02 PM

Quote:
Originally Posted by Awgd8
It is in the setting ...
You must have iOS.

As for the boosting around 2K rpm under normal driving, I was under the impression that the JB4 only controls the boost under WOT. Is this not the case?
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Awgd8 Awgd8 is offline
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Default 01-03-2018, 02:47 PM

Quote:
Originally Posted by Cdubber9
You must have iOS.

As for the boosting around 2K rpm under normal driving, I was under the impression that the JB4 only controls the boost under WOT. Is this not the case?
Since I知 still under the break in period, I am very aware about making too much boost. So I drive under boost 1 PSI all the time. I知 not sure, but I will see 1 psi while I知 cruising at 2k RpM on Map 1. Maybe Terry can answer this better.
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QFitty QFitty is offline
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Default 01-03-2018, 05:50 PM

You don't make boost while you are cruising. At normal cruise you are most likely creating vacuum. Once you accelerate you tend to lose the vacuum your engine creates. Vacuum is negative pressure so as you accelerate your vacuum goes from negative to O (zero) and eventually it will become positive pressure(boost).


2016 Q50 Red Sport
BMS JB4 Map 1
Infiniti Sport Mufflers
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(#1914)
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Awgd8 Awgd8 is offline
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Default 01-03-2018, 06:05 PM

Quote:
Originally Posted by QFitty
You don't make boost while you are cruising. At normal cruise you are most likely creating vacuum. Once you accelerate you tend to lose the vacuum your engine creates. Vacuum is negative pressure so as you accelerate your vacuum goes from negative to O (zero) and eventually it will become positive pressure(boost).
That’s the reason I asked. Since while I’m cruising and just do a small gas pedal tap which I normally do before and I never hit 1 psi. With Map 1 on JB4 I get to
1 psi and with Map 2 , I’m below 1 psi. In short when I’m in map 1 , I build boost early even just cruising and just a hair push on the pedal I go up to 1psi easily. I guess I’ll stick with Map 2 (+5 PSI) for now.

Update: Ok both map 1 and 2 are at 1-1.3 PSI of boost @ 2k rpm on cruise, steady foot on gas pedal.

Last edited by Awgd8; 01-03-2018 at 08:25 PM..
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(#1915)
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Q50_Spartan Q50_Spartan is offline
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Default 01-04-2018, 04:49 AM

Good morning everyone!!

So i just ordered my JB1 the other day and it should be coming in tomorrow. I'm trying to read through everything in the forum but its alot lol. I was wondering if someone can lead me in the right direction. I have a Silver Sport Q50 and I want to eventually leave it at +6psi and use that daily. is that okay? should i increase the boost incrementally till i reach 6psi? and what DWP is common for different PSI's.
Thanks a lot!!
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(#1916)
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ekpogi ekpogi is offline
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Default 01-04-2018, 06:19 AM

Quote:
Originally Posted by Awgd8
That痴 the reason I asked. Since while I知 cruising and just do a small gas pedal tap which I normally do before and I never hit 1 psi. With Map 1 on JB4 I get to
1 psi and with Map 2 , I知 below 1 psi. In short when I知 in map 1 , I build boost early even just cruising and just a hair push on the pedal I go up to 1psi easily. I guess I値l stick with Map 2 (+5 PSI) for now.

Update: Ok both map 1 and 2 are at 1-1.3 PSI of boost @ 2k rpm on cruise, steady foot on gas pedal.
Map 1 and Map 2 applies 4psi and 5psi over stock respectively. It's across the entire rpm range, not just specific RPMs. Additionally, those boost targets will only be achieved if you floor it. And i believe Terry mentioned that jb4 won't start adding boost until certain coolant temp is reached (160F ??). Hope that makes sense.
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jrobohm jrobohm is offline
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Default 01-04-2018, 06:36 AM

Quote:
Originally Posted by Q50_Spartan
Good morning everyone!!

So i just ordered my JB1 the other day and it should be coming in tomorrow. I'm trying to read through everything in the forum but its alot lol. I was wondering if someone can lead me in the right direction. I have a Silver Sport Q50 and I want to eventually leave it at +6psi and use that daily. is that okay? should i increase the boost incrementally till i reach 6psi? and what DWP is common for different PSI's.
Thanks a lot!!
Congrats on the JB1!! As you have likely picked up reading over 1900 posts is that these engines love higher octane fuel. There are a bunch of other variables that each car exhibits in logs however. A suggestion would be before putting the JB1 on - get a good tank of the highest octane top tier fuel you can find (Mobil/Exxon/Valero have been good for my Q50 but Shell fuel has not for example.) The default +3 psi boost setting of the JB1 is a great way to start. Do some runs and if you picked up the BMS cable or my favorite for convenience the JB4 Bluetooth Kit, post the logs of your Q60 SS for peer review. As for DWP, it is a matter of personal preference - my SS liked a setting of 38.
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(#1918)
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Cdubber9 Cdubber9 is offline
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Default 01-04-2018, 08:06 AM

Quote:
Originally Posted by ekpogi
Map 1 and Map 2 applies 4psi and 5psi over stock respectively. It's across the entire rpm range, not just specific RPMs. Additionally, those boost targets will only be achieved if you floor it. And i believe Terry mentioned that jb4 won't start adding boost until certain coolant temp is reached (160F ??). Hope that makes sense.
Not true for the Map settings. See pg. 67 for actual settings for Maps 1 and 7 for the JB4. Not sure if Map 2 has ever been posted.

These are the current map1 settings:

Originally Posted by MAP 1
3.0 '1500
3.5 '2000
4.0 '2500
4.0 '3000
4.0 '3500
4.0 '4000
4.0 '4500
4.0 '5000
3.5 '5500
3.0 '6000
2.5 '6500
2.0 '7000

Originally Posted by Map7

60 '1500
60 '2000
60 '2500
60 '3000
60 '3500
65 '4000
70 '4500
70 '5000
70 '5500
65 '6000
60 '6500
55 '7000

Last edited by Cdubber9; 01-04-2018 at 08:11 AM.. Reason: Added Map 7 Data
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Default 01-04-2018, 08:13 AM

Why would you not want to keep the same boost level across the higher rpms as you wound the mid range rpms? This would give the effects of an increase of mid range power and minor increase of top end power.


2016 Q50 Red Sport
BMS JB4 Map 1
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(#1920)
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Awgd8 Awgd8 is offline
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Default 01-04-2018, 11:05 AM

Quote:
Originally Posted by Cdubber9
Not true for the Map settings. See pg. 67 for actual settings for Maps 1 and 7 for the JB4. Not sure if Map 2 has ever been posted.

These are the current map1 settings:

Originally Posted by MAP 1
3.0 '1500
3.5 '2000
4.0 '2500
4.0 '3000
4.0 '3500
4.0 '4000
4.0 '4500
4.0 '5000
3.5 '5500
3.0 '6000
2.5 '6500
2.0 '7000

Originally Posted by Map7

60 '1500
60 '2000
60 '2500
60 '3000
60 '3500
65 '4000
70 '4500
70 '5000
70 '5500
65 '6000
60 '6500
55 '7000
So for MAP 1 and possibly Map 2, If you don’t race or track the car a lot and mostly DD the car , I think this RPM range 1,500-2,000 should be stock boost setup to maximize the engine high compression 10.3:1 design when cruising and not relying on the turbo boost. I prefer that to be on negative PSI. (Sometimes less is more in this situation)

Last edited by Awgd8; 01-04-2018 at 11:32 AM..
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5oh_mo 5oh_mo is offline
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Default 01-04-2018, 11:35 AM

Terry - Any news on the release date for the dual cone intakes?


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Terry @ BMS Terry @ BMS is online now
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Default 01-04-2018, 04:31 PM

Still waiting around for one of the brackets that was manufactured off in the first batch. Should be any day now.


Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

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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boostfeen boostfeen is offline
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Default 01-04-2018, 05:43 PM

Quote:
Originally Posted by Terry @ BMS
Boost creep would be caused by EGT increasing and the resulting larger exhaust volume overwhelming the factory wasteagate. I would not expect that to happen with the factory turbo system and we haven't seen any evidence of it during plenty of long 1/2 mile races. It's normally only an issue with poorly designed aftermarket turbo systems, specifically ones that have too small or too restrictive a wastegate. I also don't see what role typical turbo back exhaust modifications would play on it. If anything they would help the issue, not cause it.
This is the Visconti Tuning response:


"I agree, a poorly designed wastegate absolutely would cause boost creep. Exhaust restriction is what's going to prevent or help prevent boost creep, a simple google search will show you this from multiple sources. When you take a car with a large motor, small turbo, poorly designed wastegate and add a free flowing exhaust you make the perfect conditions for it."
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boostfeen boostfeen is offline
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Default 01-04-2018, 05:49 PM

Quote:
Originally Posted by Awgd8
It痴 a customer car (RS). I知 posting this to verify that +3 psi and +4 psi on 93 octane is still safe for the RS. I guess no need for E85?
I ran my RS on JB1 @ +4 93 octane no problems and @ +5psi 100 octane mix and went 12.6 @ 111
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GSORS400 GSORS400 is offline
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Default 01-04-2018, 07:11 PM

Quote:
Originally Posted by QFitty
Why would you not want to keep the same boost level across the higher rpms as you wound the mid range rpms? This would give the effects of an increase of mid range power and minor increase of top end power.
One of the reasons for tapering boost at higher RPM has to do with turbo efficiencies. The relatively small turbos which are used on both RS and SS begin to lose efficiency beginning at around 5000 RPM or so meaning the turbos are not capable of producing a lot of additional boost at the higher RPMs. With the reduction in efficiency comes increased heat which can reduce turbo life. Take a look at the dyno charts on the BMS website and you can see the HP and TQ curves for the different boost levels converge at higher RPM.

Here's an article Stillen published discussing turbos: https://blog.stillen.com/2016/12/to-...30ddtt-turbos/
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