JB4 on a GTS M4?

[Boostin FD]

I posted couple of questions over in the GTS section, but I figured, it's more Engine related...

Anyone with a GTS installed a JB4? Most everything I read on the JB4, it shows upgrades for the regular m3/m4... With GTS already pushing 22-23psi, would there be any benefit of this thing?

I do like the app with the fancy gauges

Thanks!

[FriedPiston]

Map 1-2 will be moot, but Map 4-7 will still be handy.

[Boostin FD]

So the map 1 and 2 don't just raise the boost over the stock level already?

[FriedPiston]

Based on the latest S55 firmware:

Map 1: +4 boost additive across the entire powerband
Map 2: slightly more aggressive version of Map 1 (22 psi peak)

https://www.n54tech.com/forums/showthread.php?t=25401

[Fuel-It!]

Originally Posted by nars3000

Based on the latest S55 firmware:

Map 1: +4 boost additive across the entire powerband
Map 2: slightly more aggressive version of Map 1 (22 psi peak)

https://www.n54tech.com/forums/showthread.php?t=25401

Map1 would work very well for the GTS but don't forget map3:

Map 3: Slightly less aggressive version of map 1 intended for vehicles running on lower grade fuels such as 91 octane.

That is the map I would suggest starting on with the GTS which already runs more boost in factory trim.

[Boostin FD]

Originally Posted by Fuel-It!

Map1 would work very well for the GTS but don't forget map3:

Map 3: Slightly less aggressive version of map 1 intended for vehicles running on lower grade fuels such as 91 octane.

That is the map I would suggest starting on with the GTS which already runs more boost in factory trim.

Thanks. I only use 93 octane here... never anything less.

[spool twice]

on Map 1, for either CS or GTS, is it still a +4 additive, or is it based on the base M4 boost profile and then adds +4?

Does Map 6 additive work for them as well?

[Boostin FD]

Originally Posted by spool twice

on Map 1, for either CS or GTS, is it still a +4 additive, or is it based on the base M4 boost profile and then adds +4?

Does Map 6 additive work for them as well?

This is what I was curious as well... the Burger guy said that map 1 and 2 add +4 above stock... He said the following "You will start on map 1 which will try to get 4psi over stock. Start on map 1 and do a data log so we can see how much more we can get."

He said to send him the log back and then he can see about "Squeezing more".

[blockdoc]

Why not a custom tune? That's a hell of a car you have.

[Boostin FD]

Originally Posted by blockdoc

Why not a custom tune? That's a hell of a car you have.

Honestly, I don't really care to do any custom tunes or flashing the ECU. I like this Piggyback mainly for the ease of use and the "Fancy app". Plus, it's pretty cheap for what you get. GTS is fast as is, can't even use the power I have without spinning tires. So my thing was really, getting a JB4 for the exhaust flaps, iPhone app, and then the hp... if any.

[Fuel-It!]

Originally Posted by spool twice

on Map 1, for either CS or GTS, is it still a +4 additive, or is it based on the base M4 boost profile and then adds +4?

Does Map 6 additive work for them as well?

Yes exactly. Map6 can also be used for a custom profile. But I'd start with map3, log it, and post the log here or email to BMS directly for tuning advice based on your specific car, fuel, and needs!

[blockdoc]

Originally Posted by Boostin FD

Honestly, I don't really care to do any custom tunes or flashing the ECU. I like this Piggyback mainly for the ease of use and the "Fancy app". Plus, it's pretty cheap for what you get. GTS is fast as is, can't even use the power I have without spinning tires. So my thing was really, getting a JB4 for the exhaust flaps, iPhone app, and then the hp... if any.

Fair enough. To each their own.

[Boostin FD]

Quick question for anyone that has jb4 with the mobile media kit... Can you switch exhaust flaps on/off through the app, or do you still have to use the BC button?

I guess what i'm wondering is, Even with the app, will I still have to use the steering wheel controls?

Thanks!

[Fuel-It!]

Originally Posted by Boostin FD

Quick question for anyone that has jb4 with the mobile media kit... Can you switch exhaust flaps on/off through the app, or do you still have to use the BC button?

I guess what i'm wondering is, Even with the app, will I still have to use the steering wheel controls?

Thanks!

I've been asking for that for months in the app and they tell me in app exhaust control is coming in the next version, for what it's worth.

[Boostin FD]

Originally Posted by Fuel-It!

I've been asking for that for months in the app and they tell me in app exhaust control is coming in the next version, for what it's worth.

So, as of now, still have to use BC button

Thanks!

[spool twice]

Let's say I only want to add the JB4 as a boost additive on MAP after 6,000rpm (just to keep the HP curve rising in a linear way for added fun, but nothing over the top), in theory if all I did was drive between 2000-5000rpm for fun, it shouldn't alter any signals for the DME to rise suspicions right?

I wanted to do this, which shouldn't alter fuel trims to deviate too much:
6000rpm +.5
6500rpm +1
7000rpm +1.5

Or something along those lines depending on the OE boost curve.

[Fuel-It!]

Yes you have that flexibility using map6!

[drgmt]

Leave the car as is. It's near Perfect. And probably operating at it's limit.