[Silvermike]

Guys,

There is a big thread on the N55 section about Racechip. People are having good things to say about the RC and im getting curious. Are any of you using the RC ultimate on the N20 motor. Can you share your experience?

I'm debating which is the best route to go with my car. I find the JB4 a bit cumbersome, while I think the gains of the Burger Stage 1, or AFE scorcher insufficient. The RC might be the solution?

N55 thread: http://www.2addicts.com/forums/showt...1#post17571011

RC site: https://www.racechip-usa.com/chiptuning/BMW/2-Series/

[mike@x-ph.com]

Im not bashing RC but i would like to make couple things clear.
The RC ultimate is comparable to the JB stage 1 not the JB4.
RC ultimate and Jb are both boost controllers that adds boost accross the RPM range.
Jb4 offers datalogging, code reading and deleting, boost control by every 500 rpm, smoother delivery, etc...

If the comparison is between Jb4 and race ultimate, in my opinion Jb4 is better because it is a complete tune.
That being said a more useful comparison would be between Jb and race ultimate since they are both stage 1 tunes.

[Icy J]

Originally Posted by mike@x-ph.com

Im not bashing RC but i would like to make couple things clear.
The RC ultimate is comparable to the JB stage 1 not the JB4.
RC ultimate and Jb are both boost controllers that adds boost accross the RPM range.
Jb4 offers datalogging, code reading and deleting, boost control by every 500 rpm, smoother delivery, etc...

If the comparison is between Jb4 and race ultimate, in my opinion Jb4 is better because it is a complete tune.
That being said a more useful comparison would be between Jb and race ultimate since they are both stage 1 tunes.

How much extra power can you get from the JB4 vs the BMS Stage 1 without pushing the engine too much (ie not getting intakes, intercooler, etc) on a 20i engine?

[mike@x-ph.com]

Originally Posted by Icy J

How much extra power can you get from the JB4 vs the BMS Stage 1 without pushing the engine too much (ie not getting intakes, intercooler, etc) on a 20i engine?

In terms of power on a completely stock car JB and JB4 are very similar ( with the Jb4 having a smoother power delivery).
The Jb4 shines over all the other tunes once you add extra mods. If you are looking to keep your car stock look into getting stage 1 tunes.
If you want to add mods in the future JB4 is the way to go.

[Silvermike]

Originally Posted by Icy J

How much extra power can you get from the JB4 vs the BMS Stage 1 without pushing the engine too much (ie not getting intakes, intercooler, etc) on a 20i engine?

This.

I like the JB4 as burger says u can push in the 260-270whp range @17psi (Map 5), but its a bit of wire splicing.

The RC ultimate has various settings that u can use to push more boost etc... but info on that is pretty vague. The BMS stage 1/ AFE scorcher both boost 4psi increase with a 215-225whp range.

[mike@x-ph.com]

Originally Posted by Silvermike

This.

I like the JB4 as burger says u can push in the 260-270whp range @17psi (Map 5), but its a bit of wire splicing.

The RC ultimate has various settings that u can use to push more boost etc... but info on that is pretty vague. The BMS stage 1/ AFE scorcher both boost 4psi increase with a 215-225whp range.

There is no wire splicing with the JB4

[Silvermike]

Originally Posted by mike@x-ph.com

There is no wire splicing with the JB4

The FF wires, which we would need on the 20i

[Icy J]

Originally Posted by mike@x-ph.com

There is no wire splicing with the JB4

I thought the main 'disadvantage' of the JB4 was that you have to do something with the wires that makes it much more obvious that it's been messed with?

[mike@x-ph.com]

Originally Posted by Icy J

I thought the main 'disadvantage' of the JB4 was that you have to do something with the wires that makes it much more obvious that it's been messed with?

This is not a disadvantage. On the contrary it should be thought of as an advantage for the Jb4. It connect to more sensors so it can offer more control, safety and power over any other tune.

[mike@x-ph.com]

Originally Posted by Silvermike

The FF wires, which we would need on the 20i

If you are not planning on using high mixtures of E85, you do not need to connect the FF wires.

[Silvermike]

Originally Posted by mike@x-ph.com

If you are not planning on using high mixtures of E85, you do not need to connect the FF wires.

I was told by burger that there is a fueling issue with the 20i so the FF harness should be used along with map 5. They do not recommend the JB4 on the 20i without the FF harness.

[Silvermike]

Originally Posted by mike@x-ph.com

This is not a disadvantage. On the contrary it should be thought of as an advantage for the Jb4. It connect to more sensors so it can offer more control, safety and power over any other tune.

This is true. I do believe the JB4 is a better all-round tune, with more room to grow, and better at managing the system at the increased output. The CAN functionality is particularly good.

The downside is its a bit of a handful to install/uninstall and more room for user error.

[mike@x-ph.com]

Originally Posted by Silvermike

I was told by burger that there is a fueling issue with the 20i so the FF harness should be used along with map 5. They do not recommend the JB4 on the 20i without the FF harness.

This is directly from burger tuning installation guide.
It says on page 8 : Black patch: We've added the FLEX_FUEL connector to newer JB4 harnesses which can be connected if you plan to
utilize E85 fuel mixtures. Refer to the FLEX_FUEL guide for additional information. It can be tucked out of the way
until you wish to connect it.

Unless there has been change, FF wires are not used unless you are using ethanol.
http://www.burgertuning.com/instructions/f30_install.pdf

[Silvermike]

Originally Posted by mike@x-ph.com

This is directly from burger tuning installation guide.
It says on page 8 : Black patch: We've added the FLEX_FUEL connector to newer JB4 harnesses which can be connected if you plan to
utilize E85 fuel mixtures. Refer to the FLEX_FUEL guide for additional information. It can be tucked out of the way
until you wish to connect it.

Unless there has been change, FF wires are not used unless you are using ethanol.
http://www.burgertuning.com/instructions/f30_install.pdf

I believe that instruction is true for a 28i. for the 20i motor, the flex fuel is set to "50" to help with the under fueling issues associated with the stock 20i map.

I was also told that due to " timing related issues" more than 17psi should not be attempted on the 20i map. So only map 5.

[mike@x-ph.com]

Originally Posted by Silvermike

I believe that instruction is true for a 28i. for the 20i motor, the flex fuel is set to "50" to help with the under fueling issues associated with the stock 20i map.

I was also told that due to " timing related issues" more than 17psi should not be attempted on the 20i map. So only map 5.

you have a 28i no?

[Silvermike]

Originally Posted by mike@x-ph.com

you have a 28i no?

unfortunately no. 20i.

[mike@x-ph.com]

Originally Posted by Silvermike

unfortunately no. 20i.

You just changed it under the car you drive

[Silvermike]

Originally Posted by mike@x-ph.com

You just changed it under the car you drive

yea, i realized i had the wrong thing. lol.

[Thescout13]

Originally Posted by Silvermike

The FF wires, which we would need on the 20i

The FF wires require no splicing of stock car wires at all.

[Silvermike]

Originally Posted by Icy J

How much extra power can you get from the JB4 vs the BMS Stage 1 without pushing the engine too much (ie not getting intakes, intercooler, etc) on a 20i engine?

this: http://www.n54tech.com/forums/showpo...36&postcount=1

[Silvermike]

Originally Posted by Thescout13

The FF wires require no splicing of stock car wires at all.

when i read the install it mentions splicing of 2 CAN wires

[Thescout13]

Originally Posted by Silvermike

when i read the install it mentions splicing of 2 CAN wires

That's the JB4...the jb4 does require tapping in with positaps to the Can wires which leaves a little pinch it's not splicing. But you were talking about the FF wires. The FF wires for the x20i does not require any additional splicing of the stock car wires only of the JB4 wires....