Jb4 and MPG

Jadar · 08-27-2015, 06:12 AM

Installed a catted DP and JB4 and it seems like the MPG has fallen off the wagon significantly! Maybe I'm in boost way too much and easier, but have many of you noticed similar outcomes? But even when cruising in comfort seems like it's gotten worse.

Thoughts?

Bee Pee · 08-27-2015, 06:14 AM

What map[s] are you running ?

Mine hasn't changed too much when cruising.

Drinks like a sailor on shore leave when you gun it though, but its worth it !!!

Jadar · 08-27-2015, 06:17 AM

Quote:

Originally Posted by Bee Pee

What map[s] are you running ?

Mine hasn't changed too much when cruising.

Drinks like a sailor on shore leave when you gun it though, but its worth it !!!

Map 2, sorry should have mentioned that. Yeah I guess that's what I'd say! Drinks like a fish when in boost for sure.

Buckeyes · 08-27-2015, 08:10 AM

Mine increased slightly when commuting to work. 40 highway miles(comfort) each way and getting about 35-36 mpg. Around the house(sport +) it drops to the low 20's but damn is it fast. Jb4 map 2, er DP, AFE intake 93 octane.

Jadar · 08-27-2015, 08:48 AM

Quote:

Originally Posted by Trcb777

Mine increased slightly when commuting to work. 40 highway miles(comfort) each way and getting about 35-36 mpg. Around the house(sport +) it drops to the low 20's but damn is it fast. Jb4 map 2, er DP, AFE intake 93 octane.

It is amazingly fast! I couldn't believe how well the DP and tuner woke this car up! And that's even with a catted DP! Haven't raced anything yet but I'm sure I'll have fun with it.

Mike@N54Tuning.com · 08-30-2015, 06:08 PM

Quote:

Originally Posted by dd1981

Installed a catted DP and JB4 and it seems like the MPG has fallen off the wagon significantly! Maybe I'm in boost way too much and easier, but have many of you noticed similar outcomes? But even when cruising in comfort seems like it's gotten worse.

Thoughts?

Are you mashing the peddle more now as the car is just funner to drive

If you are driving exactly the same way as before fuel economy would not be significantly different.

Mike

G30 B58 · 08-30-2015, 06:37 PM

With gas this cheap, I don't care. Even if it was $4/gallon I wouldn't care. Too much fun.

AC792 · 08-30-2015, 07:03 PM

I'm coming from a Jeep SRT8 which gave me about 12-13 mpg no matter how I drove, so the 335 is like a hybrid to me!

I get about 33 highway and low 20's around the city.

Jadar · 08-30-2015, 08:26 PM

Quote:

Originally Posted by Mike@N54Tuning.com

Quote:

Originally Posted by dd1981

Installed a catted DP and JB4 and it seems like the MPG has fallen off the wagon significantly! Maybe I'm in boost way too much and easier, but have many of you noticed similar outcomes? But even when cruising in comfort seems like it's gotten worse.

Thoughts?

Are you mashing the peddle more now as the car is just funner to drive

If you are driving exactly the same way as before fuel economy would not be significantly different.

Mike

I'm sure that's the contributing factor lol most of the time is say.

But one thing I noticed on my factory MpG readout I see it climb to 26-27-28 mpg then fall to 16-17-18-19 intermittent, and I'm not talking about the one that's suppose to react with your throttle input, I'm speaking of the one that's the average readout. It's never really that fast to move but now it's like going up n down crazy!

mike@x-ph.com · 08-31-2015, 01:02 PM

the Jb4 does not target higher boost on low RPM. You should not get any MPG difference unless you are driving more aggressively. With the extra power you are getting, im sure that is the case

08-27-2015, 06:12 AM	#1
Jadar Dejan 1753 Rep 4,197 Posts Drives: 2018 Audi S3 Join Date: Dec 2010 Location: Michigan Ave. iTrader: (6) Garage List 2013 BMW 335i [10.00] 2015 BMW 228i M Spo ... [0.00] 2013 Ford Focus (DD) [0.00] 2001 Alfa Romeo 156 [0.00]	Jb4 and MPG Installed a catted DP and JB4 and it seems like the MPG has fallen off the wagon significantly! Maybe I'm in boost way too much and easier, but have many of you noticed similar outcomes? But even when cruising in comfort seems like it's gotten worse. Thoughts? __________________ FBO-PS1 and stuff
	Appreciate 0 Tweet Quote

08-27-2015, 06:14 AM	#2
Bee Pee Brigadier General 1779 Rep 4,516 Posts Drives: AW M2 DCT Join Date: Jun 2010 Location: SW London iTrader: (3)	What map[s] are you running ? Mine hasn't changed too much when cruising. Drinks like a sailor on shore leave when you gun it though, but its worth it !!! __________________ Fettled M135i EB AT then AW M2 DCT - both gone but not forgotten: Current '22 X3M LCI..
	Appreciate 0 Quote

08-27-2015, 08:10 AM	#4
Buckeyes Captain 353 Rep 939 Posts Drives: 2013 335i M Sport Join Date: Jan 2013 Location: Atlanta iTrader: (2)	Mine increased slightly when commuting to work. 40 highway miles(comfort) each way and getting about 35-36 mpg. Around the house(sport +) it drops to the low 20's but damn is it fast. Jb4 map 2, er DP, AFE intake 93 octane.
	Appreciate 0 Quote

08-30-2015, 06:37 PM	#7
G30 B58 Pace Car Driver 1548 Rep 3,164 Posts Drives: '22 AW G30 B58 M-Sport Join Date: May 2014 Location: my garage in PA iTrader: (0)	With gas this cheap, I don't care. Even if it was $4/gallon I wouldn't care. Too much fun.
	Appreciate 0 Quote

08-30-2015, 07:03 PM	#8
AC792 Lieutenant 60 Rep 541 Posts Drives: 2012 F30 335i Join Date: Jan 2012 Location: Milwaukee, WI iTrader: (4)	I'm coming from a Jeep SRT8 which gave me about 12-13 mpg no matter how I drove, so the 335 is like a hybrid to me! I get about 33 highway and low 20's around the city. __________________ Now: 2012 F30 335i / 6MT / JB4 / ER Catless DP Sold: 2010 Jeep GC SRT8 Sold: 2007 E90 335i / 6MT / JB4 / Vishnu Exhaust / VMR 710 19" / BMS DCI / HKS Blow Off Valve / Tinted Tails / Clutch Stop
	Appreciate 0 Quote

08-31-2015, 01:02 PM	#10
mike@x-ph.com BimmerPost Supporting Vendor 24188 Rep 190,797 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	the Jb4 does not target higher boost on low RPM. You should not get any MPG difference unless you are driving more aggressively. With the extra power you are getting, im sure that is the case __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435 Last edited by mike@x-ph.com; 08-31-2015 at 02:33 PM..
	Appreciate 1 Quote