Some more COBB and JB4 Testing

Mike@N54Tuning.com · 10-10-2011, 07:25 PM

I know there has been a lot of interest recently in comparing the output and performance of the JB4 when compared to the new kid on the block (COBB) so BMS went over to the dyno and did some testing, so I thought I would share the results with community as its very topical.

Quote:

Hey guys,

Headed back to the dyno to retest the Stage2 maps. Since last round I've added CPE downpipes and an OEM N55 midpipe to the car. It's still running the stock intercooler and 135i muffler back, still on 93 octane, etc.

The main purpose was just to test the JB4 map 2 vs. the Cobb Stage2 map. But while it was strapped down for kicks I tested the Cobb Stage2+ map and did a few runs working on a JB4 map 6 to test some "more aggressive" type JB4 settings.

As last time I have tons of data to sort though but as a general rule the Cobb ran more boost, more fuel, and less advance compared to the JB4. The Stage2+ map is definitely much more aggressive with a peak of 18.5psi compared to JB4 map 2's peak of only 14.5psi, but the JB4 runs a lot more advance and is actually very close in terms of power output from 5000rpm+. The range you'll be operating in during a race.

The JB4 map 6 is just something I was playing around with. I was able to get the boost and advance close to where I wanted it but didn't have time to work on the fueling end. So for the moment it's just a work in progress. But, it was very competitive in terms of power output.

135i_vs_ · 10-10-2011, 08:43 PM

Thanks for posting these, very helpful. Satisfied with my recent JB4 purchase. running Map 1 (since all is stock).

1speedbike · 10-10-2011, 08:49 PM

Again, great data! Cobb and JB4 are pretty much neck and neck.. well JB4 is putting out slightly more power vs Cobb Stage 2, but this really shows how great both tunes are!

Since the Cobb tends to rely on fuel and boost versus the JB4 which relies on more advance to get those numbers, I'm wondering what Cobb guys are getting for their daily MPG versus JB4 guys.

Also, other than the mentioned downpipes and midpipes, what are the mods to the cars?

1-2MANY · 10-10-2011, 08:51 PM

Nice numbers. Had jb3 and now switched to cobb. Both are great. Did you also have a FMIC for the Cobb stage 2+ wonder if that would make those numbers even greater.

oops, just saw it had stock intercooler

CLV0009 · 10-11-2011, 10:10 AM

Is the JB4 for the N55 engine????

LateralG'z · 10-11-2011, 12:35 PM

The AFR's look unsafe IMHO on the Burger motorsports to be advancing timing. I am surprised there is not knocking occurring in hi ambient conditions. I definitively think is far better for the motor durability after looking at these. Thanks for the great post!

MGallop · 10-11-2011, 02:43 PM

Quote:

Originally Posted by CLV0009

Is the JB4 for the N55 engine????

the posted dyno's are n54

pearso02 · 10-11-2011, 04:44 PM

I'll stick with my COBB. Install is just too easy!

igzekyativ · 10-11-2011, 06:49 PM

Quote:

Originally Posted by 1speedbike

Since the Cobb tends to rely on fuel and boost versus the JB4 which relies on more advance to get those numbers, I'm wondering what Cobb guys are getting for their daily MPG versus JB4 guys.

here are some stats on gas milage for me (with cobb)... i got the AP in middle of May...

akak1997 · 10-11-2011, 07:32 PM

So because Cobb run more boost, would it be safe to say a car with upgraded FMIC will make more power on Cobb than on JB4? Or the cooler charge will allow even more aggressive timing?
I wanna see some comparison between the two tunes with FBO, no meth. Please!

evilstib · 10-13-2011, 11:42 PM

Quote:

Originally Posted by akak1997

So because Cobb run more boost, would it be safe to say a car with upgraded FMIC will make more power on Cobb than on JB4? Or the cooler charge will allow even more aggressive timing?
I wanna see some comparison between the two tunes with FBO, no meth. Please!

+1

10-10-2011, 08:43 PM	#2
135i_vs_ Captain 72 Rep 697 Posts Drives: M5, 135i, 335d, F10 550xi Join Date: Sep 2011 Location: CT iTrader: (0)	Thanks for posting these, very helpful. Satisfied with my recent JB4 purchase. running Map 1 (since all is stock).
	Appreciate 0 Quote

10-10-2011, 08:49 PM	#3
1speedbike Brigadier General 732 Rep 3,274 Posts Drives: 2022 X4 M40i, 2008 135i Join Date: Jun 2008 Location: MKE iTrader: (15)	Again, great data! Cobb and JB4 are pretty much neck and neck.. well JB4 is putting out slightly more power vs Cobb Stage 2, but this really shows how great both tunes are! Since the Cobb tends to rely on fuel and boost versus the JB4 which relies on more advance to get those numbers, I'm wondering what Cobb guys are getting for their daily MPG versus JB4 guys. Also, other than the mentioned downpipes and midpipes, what are the mods to the cars? __________________ 2022 X4 M40i - 2008 135i - 2015 F700GS On Order - 2024 i4 M50 Scruffy's gonna die the way he lived... Mmhm.
	Appreciate 0 Quote

10-10-2011, 08:51 PM	#4
1-2MANY First Lieutenant 46 Rep 394 Posts Drives: F80 M3 Join Date: Jan 2009 Location: Dallas TX iTrader: (3)	Nice numbers. Had jb3 and now switched to cobb. Both are great. Did you also have a FMIC for the Cobb stage 2+ wonder if that would make those numbers even greater. oops, just saw it had stock intercooler Last edited by 1-2MANY; 10-10-2011 at 09:00 PM..
	Appreciate 0 Quote

10-11-2011, 10:10 AM	#5
CLV0009 Private 2 Rep 68 Posts Drives: 2013 BMW 528i 2015 BMW 328i GT Join Date: Mar 2010 Location: Miami, FL iTrader: (0)	Is the JB4 for the N55 engine???? __________________ God created Turbo lag to give V8's a chance. Gotta love this car.
	Appreciate 0 Quote

10-11-2011, 12:35 PM	#6
LateralG'z Private 1 Rep 80 Posts Drives: Hopefully a 1M Join Date: Oct 2011 Location: USA iTrader: (0)	The AFR's look unsafe IMHO on the Burger motorsports to be advancing timing. I am surprised there is not knocking occurring in hi ambient conditions. I definitively think is far better for the motor durability after looking at these. Thanks for the great post!
	Appreciate 0 Quote

10-11-2011, 04:44 PM	#8
pearso02 Private First Class 6 Rep 181 Posts Drives: 2013 Alpine White M3 ZCP Join Date: Jan 2010 Location: Muskogee, OK iTrader: (0)	I'll stick with my COBB. Install is just too easy!
	Appreciate 0 Quote

10-11-2011, 07:32 PM	#10
akak1997 Major 64 Rep 1,159 Posts Drives: BMW 135 @ 135mph Join Date: Aug 2008 Location: Los Angeles iTrader: (2) Garage List 2008 135i [0.00]	So because Cobb run more boost, would it be safe to say a car with upgraded FMIC will make more power on Cobb than on JB4? Or the cooler charge will allow even more aggressive timing? I wanna see some comparison between the two tunes with FBO, no meth. Please!
	Appreciate 0 Quote