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post #1 of 12 (permalink) Old 08-24-2019, 02:44 PM Thread Starter
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Hello all,

I have a stock q60 with just the sport Infiniti exhaust (no mufflers). I purchased the Jb4 w/bluetooth last night.

Can I just run the jb4 without any other supporting mods? I've been also on the fence about the Lower Down Pipes too but figured the jb4 would be easier to install myself. I come from Wrx and Cobb world so I'm not familiar with how the jb4 works and/or doesn't with supporting mods. Will the jb4 be too restricted and add too much with the restricted stock downpipes?

I just want to go about this in a safe and efficient manner.
Thanks all
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post #2 of 12 (permalink) Old 08-24-2019, 03:09 PM
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Originally Posted by Chris K View Post
Hello all,

I have a stock q60 with just the sport Infiniti exhaust (no mufflers). I purchased the Jb4 w/bluetooth last night.

Can I just run the jb4 without any other supporting mods? I've been also on the fence about the Lower Down Pipes too but figured the jb4 would be easier to install myself. I come from Wrx and Cobb world so I'm not familiar with how the jb4 works and/or doesn't with supporting mods. Will the jb4 be too restricted and add too much with the restricted stock downpipes?

I just want to go about this in a safe and efficient manner.
Thanks all
I've been running a JB4 for about 1 1/2 years now, most of that time was without any additional mods and it certainly improved the performance without any issues. Opening up the exhaust helps as I've just replaced the OEM exhaust with a FI CBE and have noticed an additional boost in power. I'll likely add a LDP in the near future as I also take a conservative approach to engine modifications. Eventually, I'll likely end up selling the JB4 and going with EcuTek but for now, it functions well.

The JB4 is simple to install, especially if you route the OBDII cable through the driver's side front quarter panel as opposed to through the firewall grommet. See Boost In Motion's YouTube video on the easy way to install the JB4 for details.

You should read up on how the JB4 works on Burger Tuning's website. Their JB4 forum has a tremendous amount of information about how it works and I won't try to repeat it all here. I would recommend running Map 6 (tapered boost) and that you review your data logs to make sure you're not getting into trouble with your AFR going too lean and pulling your ignition timing to protect the engine.
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post #3 of 12 (permalink) Old 08-25-2019, 01:24 AM Thread Starter
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@Avedis53 , thanks for the insight. I will definitely read more about the Jb4. I've subscribed to Boost in Motion and have watched many of the YouTube videos, good stuff. When I do my install I'll certainly be updating everyone on progress with my logging etc.. thanks again.
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post #4 of 12 (permalink) Old 08-26-2019, 12:51 PM
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Originally Posted by Chris K View Post
Hello all,

I have a stock q60 with just the sport Infiniti exhaust (no mufflers). I purchased the Jb4 w/bluetooth last night.

Can I just run the jb4 without any other supporting mods? I've been also on the fence about the Lower Down Pipes too but figured the jb4 would be easier to install myself. I come from Wrx and Cobb world so I'm not familiar with how the jb4 works and/or doesn't with supporting mods. Will the jb4 be too restricted and add too much with the restricted stock downpipes?

I just want to go about this in a safe and efficient manner.
Thanks all
Depends on what maps you want to use or how much boost. Map 1 or 2 should not be an issue but in my opinion I would not try and load up on boost without other items such as , LDP and full exhaust, and a Heat Exchanger would help tremendously. Ive been running a JB4 for a few months now and love it, cheapest way of getting a ton more power! Make sure you run the highest Octane fuel available near you and data log, keep an eye on timing and AFR to make sure your car can run well with the maps you choose.
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post #5 of 12 (permalink) Old 08-27-2019, 09:37 PM Thread Starter
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Thank you @Phagan90 . Appreciate your input.
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post #6 of 12 (permalink) Old 08-29-2019, 05:54 PM
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Originally Posted by Phagan90 View Post
Depends on what maps you want to use or how much boost. Map 1 or 2 should not be an issue but in my opinion I would not try and load up on boost without other items such as , LDP and full exhaust, and a Heat Exchanger would help tremendously. Ive been running a JB4 for a few months now and love it, cheapest way of getting a ton more power! Make sure you run the highest Octane fuel available near you and data log, keep an eye on timing and AFR to make sure your car can run well with the maps you choose.
can you give me some insight on ignition timing? when buzzing around on the freeway around 80 mine stays pinned at 40 when driving locally it meddles between 15-30 depending if its a 25 or 45 zone. what exactly should we be looking for out for and monitor?
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post #7 of 12 (permalink) Old 08-30-2019, 01:02 PM
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can you give me some insight on ignition timing? when buzzing around on the freeway around 80 mine stays pinned at 40 when driving locally it meddles between 15-30 depending if its a 25 or 45 zone. what exactly should we be looking for out for and monitor?
I only look at timing on my logs, not on gauges when driving. I do know that with timing after every drop, it should be going up after like a staircase, I got a lot of help on the N54tech website with how to read my logs. Sorry I couldn’t help more!

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post #8 of 12 (permalink) Old 08-30-2019, 04:41 PM
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Here is a good read on our engine.

https://www.ovtuned.com/blogs/news/o...30ddtt-reflash

For easy of conversation the higher the number the more advance the engine has and the more power. Running a JB4 and keeping it at or below 18psi with the stock ignition curve on 91 octane its not going to knock enough to hurt the engine. The stock ECU is VERY conservative on the ignition curve. I dont know for a fact but you could probably run 87 octane and the stock ECU program would just pull a ton of timing but it would be safe. Make less power but be safe. Anyone could make a mistake and put 87 in and im sure with the stock ignition it wont blow up.

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post #9 of 12 (permalink) Old 08-30-2019, 05:50 PM
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Originally Posted by Taz169 View Post
Here is a good read on our engine.

https://www.ovtuned.com/blogs/news/o...30ddtt-reflash

For easy of conversation the higher the number the more advance the engine has and the more power. Running a JB4 and keeping it at or below 18psi with the stock ignition curve on 91 octane its not going to knock enough to hurt the engine. The stock ECU is VERY conservative on the ignition curve. I dont know for a fact but you could probably run 87 octane and the stock ECU program would just pull a ton of timing but it would be safe. Make less power but be safe. Anyone could make a mistake and put 87 in and im sure with the stock ignition it wont blow up.

I think many cars with stock tune on 91/93 can safely run 87 albeit for short term. When I bought my RS, the sales guy filled it up with 87 (intentionally). I thought he was kidding. I had to drive gingerly until it reached half tank and I filled it up with 93. That was 30k miles ago btw.

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post #10 of 12 (permalink) Old 08-30-2019, 07:17 PM
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I think many cars with stock tune on 91/93 can safely run 87 albeit for short term. When I bought my RS, the sales guy filled it up with 87 (intentionally). I thought he was kidding. I had to drive gingerly until it reached half tank and I filled it up with 93. That was 30k miles ago btw.
wow, why would he do that?! It’s nice that he admitted to it but as a sales consultant selling a Red Sport, he should know not to put anything below 91....

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