Any correlation between tunes and excessive carbon buildup?

Twilight1 · 09-16-2013, 02:47 PM

It seems with the large amount of fuel being dumped into an engine that really wasn't designed for it, could cause more carbon buildup.

i had an early JBD and, man did it throw the codes and it went through DEF, like there was a hole in the tank. Since I removed it, no problems.

Hoooper · 09-16-2013, 03:02 PM

under heavy throttle the EGR closes so heavy fueling due to the JBD should affect anything

yatzee · 09-16-2013, 09:13 PM

in theory, a JDB is just jacking up the fueling, so yeah, there should be a correlation.

I've just installed 1 on my car and find that I don't really ever use the extra power it gives - i'll probably spring for an Evolve tune or a eco tune from someone

joe_planet · 09-16-2013, 09:16 PM

Too early to tell for me.

335dM · 09-16-2013, 09:57 PM

bla bla

Puerto Rican 335d · 09-17-2013, 06:57 AM

really cant say on my part on behalf of my RENNtech flash, who knows!!! I sure dont

Hoooper · 09-17-2013, 10:32 AM

Quote:

Originally Posted by yatzee

in theory, a JDB is just jacking up the fueling, so yeah, there should be a correlation.

I've just installed 1 on my car and find that I don't really ever use the extra power it gives - i'll probably spring for an Evolve tune or a eco tune from someone

the JBD doesnt really jack up the fuel during normal driving though, at least not a significant amount. The bigger difference is when the fuel pressure skyrockets under heavy throttle, but thats when the EGR is closed anyway. Its probably "likely" that if you having a driving style that promotes faster carbon buildup and you have a JBD, it might build up marginally faster than the same car/driving style without JBD, but the difference is going to be really very small.

F32Fleet · 09-17-2013, 11:53 AM

I would think the DPF takes more of a hit rather than additional build up in the intake ports.

Hoooper · 09-17-2013, 01:02 PM

that seems likely. Though I havent noticed frequent regens. In fact from some other reviews it seems like I get fewer than the average, I notice one maybe every 750-1000 miles? That could be due to any number of things though, comparing before and after on the same car would be more meaningful

Brad335d · 09-17-2013, 07:40 PM

As of late I've been hammering on the car. The JBD is set at 100% and I'm running a 7% ASTM B100 bio diesel blend along with Motorcraft's Diesel Performance Improver (Cetane boost). The car is noticeably quicker with the the B100 and cetane booster. Only when I really drive the car hard, WOT each gear either in DS or manually shifting for an extended period (say an hour or more of driving like this) do I noticed the car going into Re-Gen more often. Driving the car as a normal person getting 28mpg I notice the car doing a Re-Gen every 1.5-2 weeks and I drive 60 miles minimum per day 5 days a week.

BMW335D88 · 09-28-2013, 10:45 PM

how can i know when is doing regen?

Crawler · 09-30-2013, 09:13 AM

You'll smell it and the fan will run for several minutes after you have stopped if the temp is not back in range when you shut her down. You also may see a little soot on the back of the car. Air hose takes most of that off without washing.

09-16-2013, 02:47 PM	#1
Twilight1 First Lieutenant 25 Rep 363 Posts Drives: Tuned SHO Join Date: Jul 2009 Location: MI iTrader: (0)	Any correlation between tunes and excessive carbon buildup? It seems with the large amount of fuel being dumped into an engine that really wasn't designed for it, could cause more carbon buildup. i had an early JBD and, man did it throw the codes and it went through DEF, like there was a hole in the tank. Since I removed it, no problems. Last edited by Twilight1; 09-17-2013 at 07:41 AM..
	Appreciate 0 Tweet Quote

09-16-2013, 03:02 PM	#2
Hoooper Colonel 213 Rep 2,210 Posts Drives: 335D Join Date: Jun 2013 Location: Petaluma, CA iTrader: (0)	under heavy throttle the EGR closes so heavy fueling due to the JBD should affect anything
	Appreciate 0 Quote

09-16-2013, 09:13 PM	#3
yatzee Retired TDI guy 4 Rep 89 Posts Drives: 2009 335D Join Date: Jul 2013 Location: Montreal iTrader: (1) Garage List 2009 BMW 335d [0.00]	in theory, a JDB is just jacking up the fueling, so yeah, there should be a correlation. I've just installed 1 on my car and find that I don't really ever use the extra power it gives - i'll probably spring for an Evolve tune or a eco tune from someone __________________ 2009 335d - JDB - MS-8
	Appreciate 0 Quote

09-16-2013, 09:16 PM	#4
joe_planet Captain 41 Rep 800 Posts Drives: 2011 X5d Join Date: Apr 2013 Location: DFW iTrader: (1)	Too early to tell for me.
	Appreciate 0 Quote

09-16-2013, 09:57 PM	#5
335dM Major 130 Rep 1,362 Posts Drives: 335d m package Join Date: May 2011 Location: montreal iTrader: (0)	bla bla
	Appreciate 0 Quote

09-17-2013, 06:57 AM	#6
Puerto Rican 335d Brigadier General 229 Rep 3,489 Posts Drives: Montego Blue 335d Join Date: Jun 2011 Location: Puerto Rico(Dominican Republic 03/2017) iTrader: (0)	really cant say on my part on behalf of my RENNtech flash, who knows!!! I sure dont __________________ RENNtech Flash(Lenny Wu)/WAGNER IC Enkei Rajin 18"/Execuhitch Hitch/Koni FSD Soft Ride Bike Rack/Brava Synthetic Motor Oil(Made in Puerto Rico)/Meth(in the works)/CBU done w Andrew EGR Race Pipe (whoa! what an animal it is now)
	Appreciate 0 Quote

09-17-2013, 11:53 AM	#8
F32Fleet Lieutenant General 3606 Rep 10,367 Posts Drives: 2015 435i Join Date: May 2005 Location: Southeastern US iTrader: (0)	I would think the DPF takes more of a hit rather than additional build up in the intake ports.
	Appreciate 0 Quote

09-17-2013, 01:02 PM	#9
Hoooper Colonel 213 Rep 2,210 Posts Drives: 335D Join Date: Jun 2013 Location: Petaluma, CA iTrader: (0)	that seems likely. Though I havent noticed frequent regens. In fact from some other reviews it seems like I get fewer than the average, I notice one maybe every 750-1000 miles? That could be due to any number of things though, comparing before and after on the same car would be more meaningful
	Appreciate 0 Quote

09-17-2013, 07:40 PM	#10
Brad335d Oil Burner 26 Rep 231 Posts Drives: 2011 BMW 335d Join Date: Nov 2009 Location: Atlanta, GA iTrader: (0) Garage List 2014 Volvo XC60 T6 AWD [0.00] 2011 BMW 335d [0.00] 2007 Ford Shelby GT500 [0.00]	As of late I've been hammering on the car. The JBD is set at 100% and I'm running a 7% ASTM B100 bio diesel blend along with Motorcraft's Diesel Performance Improver (Cetane boost). The car is noticeably quicker with the the B100 and cetane booster. Only when I really drive the car hard, WOT each gear either in DS or manually shifting for an extended period (say an hour or more of driving like this) do I noticed the car going into Re-Gen more often. Driving the car as a normal person getting 28mpg I notice the car doing a Re-Gen every 1.5-2 weeks and I drive 60 miles minimum per day 5 days a week. __________________ '11 BMW 335d Sport -JBD '07 Shelby GT500 -Not Stock
	Appreciate 0 Quote

09-28-2013, 10:45 PM	#11
BMW335D88 Private 4 Rep 96 Posts Drives: 335d Join Date: Apr 2013 Location: chicago.il iTrader: (1)	how can i know when is doing regen?
	Appreciate 0 Quote

09-30-2013, 09:13 AM	#12
Crawler Private 3 Rep 50 Posts Drives: 2011 335D Join Date: Jan 2013 Location: Sandy Eggo CA iTrader: (0)	You'll smell it and the fan will run for several minutes after you have stopped if the temp is not back in range when you shut her down. You also may see a little soot on the back of the car. Air hose takes most of that off without washing.
	Appreciate 0 Quote