JB2, JB2R offroad downpipe dynos

purplewidow · 12-01-2007, 11:27 AM

it's mt nevermind...oh and deffinitly not the smoothest...but damn good...i was thinking auto for a sec..only took a glance and noticed the 2 and 4 dips

uberschnell · 12-01-2007, 11:29 AM

Terry,
in regards to boost spikes, from what's posted on this forum it appears the boost spikes experienced by some folks running another tune occurred during certain parts of the power band under certain conditions, and were also somewhat erratic. Much of this was uncovered through the use of boost gauges and data logging on multiple cars. It's also been implied that this same thing occurs on stock vehicles to a lesser degree. To what extent has monitoring been done with the JB2 line up to ensure that this is not occurring with your tune?

thanks,

BTW, this is an honest question and not a flame.

e90AW335i · 12-01-2007, 11:30 AM

Quote:

Originally Posted by purplewidow

it's mt nevermind...oh and deffinitly not the smoothest...but damn good...i was thinking auto for a sec..only took a glance and noticed the 2 and 4 dips

Terry's car is an auto....

Terry335 · 12-01-2007, 11:38 AM

Quote:

Originally Posted by Magna3

Terry,
in regards to boost spikes, from what's posted on this forum it appears the boost spikes experienced by some folks running another tune occurred during certain parts of the power band under certain conditions, and were also somewhat erratic. Much of this was uncovered through the use of boost gauges and data logging on multiple cars. It's also been implied that this same thing occurs on stock vehicles to a lesser degree. To what extent has monitoring been done with the JB2 line up to ensure that this is not occurring with your tune?

The JB offers a pretty smooth boost curve, with few spikes. Check out a recent testers boost curve (JonM) vs. a 2.02 boost curve:

http://www.e90post.com/forums/showpo...9&postcount=79

The fundamental difference is I prefer to let the factory ECU handle boost control. The way I see it BMW spent millions developing the system and resulting curve to be as smooth and spike free as possible. Why throw that out the window?

e90AW335i · 12-01-2007, 11:41 AM

Quote:

Originally Posted by Terry335

The JB offers a pretty smooth boost curve, with few spikes. Check out a recent testers boost curve (JonM) vs. a 2.02 boost curve:

http://www.e90post.com/forums/showpo...9&postcount=79

The fundamental difference is I prefer to let the factory ECU handle boost control. The way I see it BMW spent millions developing the system and resulting curve to be as smooth and spike free as possible. Why try to reinvent the wheel?

Damn that intake air temp is a big spread between the two.....

Terry335 · 12-01-2007, 11:43 AM

Quote:

Originally Posted by kyleh4852

Damn that intake air temp is a big spread between the two.....

JBR alters air intake temp sensor to force the ECU to make more boost with less timing.

OpenFlash · 12-01-2007, 11:43 AM

Quote:

Originally Posted by Terry335

The JB offers a pretty smooth boost curve, with few spikes. Check out a recent testers boost curve (JonM) vs. a 2.02 boost curve:

http://www.e90post.com/forums/showpo...9&postcount=79

The fundamental difference is I prefer to let the factory ECU handle boost control. The way I see it BMW spent millions developing the system and resulting curve to be as smooth and spike free as possible. Why throw that out the window?

The v2.0.2beta boost curve wasn't running default boost pressures. It was adjusted on the dyno to account for the extra octane (boost above 5000rpm was cranked up). It does not represent the standard map. That was revealed earlier in the thread.

Shiv

e90AW335i · 12-01-2007, 11:44 AM

Quote:

Originally Posted by Terry335

JBR alters air intake temp sensor to force the ECU to make more boost with less timing.

Forgot about that......I guess that is a useless graph in this instance. Thanks for the reminder about that....

Beer Goggles · 12-01-2007, 07:31 PM

man some of you guys have no clue. If you turn the smoothing feature of the dyno software off it will look like an earthquake. Little bit of knowledge is so dangerous...

AU335 · 12-02-2007, 01:58 AM

Looking good Terry!! Great numbers indeed. Its been 3 days now with my JBS2 and

. Do you have a rough time-frame when you would be releasing the "Hot" pill? Cant wait!!

Terry335 · 12-02-2007, 10:58 AM

Quote:

Originally Posted by AU335

Looking good Terry!! Great numbers indeed. Its been 3 days now with my JBS2 and

. Do you have a rough time-frame when you would be releasing the "Hot" pill? Cant wait!!

Thanks!! We're testing now, and expect to wrap that up in the next 2-3 weeks. Stay tuned.

E90 335i · 12-02-2007, 11:41 AM

Quote:

Originally Posted by Terry335

Stay tuned.

.....with Juice Box!

who's ur daddy? · 12-02-2007, 03:07 PM

Terry, so the hot pill is a module for people with aftermarket downpipes? Interesting/interested!!!

e90AW335i · 12-02-2007, 03:14 PM

Quote:

Originally Posted by who's ur daddy?

Terry, so the hot pill is a module for people with aftermarket downpipes? Interesting/interested!!!

And people who run 93 octane constantly....

JB2 is for 91 - 93 octane
JB2H is for 93 octane or 91 octane w/DP's....

Terry335 · 12-02-2007, 03:37 PM

Quote:

Originally Posted by kyleh4852

And people who run 93 octane constantly....

JB2 is for 91 - 93 octane
JB2H is for 93 octane or 91 octane w/DP's....

+1!

E90 335i · 12-02-2007, 04:05 PM

Quote:

Originally Posted by kyleh4852

And people who run 93 octane constantly....

JB2 is for 91 - 93 octane
JB2H is for 93 octane or 91 octane w/DP's....

You're hired!

I think Terry has an extra bedroom in the house to house his new employee.

e90AW335i · 12-02-2007, 04:06 PM

Quote:

Originally Posted by E90 335i

You're hired!

I think Terry has an extra bedroom in the house to house his new employee.

LOL....just been paying attention.....

who's ur daddy? · 12-02-2007, 09:31 PM

Oooh, nice. We have 94 here. And I have the UR catted downpipes.

My poor tranny.

Former_Boosted_IS · 12-03-2007, 06:30 AM

That dyno is smooth guys. I have spent a lot of time at the dyno over the years, and that is a clean dyno. Terry, I have to say that looks really good man.

Ultimate Racing · 12-03-2007, 08:21 AM

Good work, Terry! Glad to hear the downpipes I sent you worked out. We're loving your JB2R over here.

Darryl
www.ultimate-racing.com

Geezer · 12-03-2007, 08:34 AM

Any guesses on what JB2H would make on a catted DP/rest stock application? I have a 6 speed car and 93 octance... great #s as always.

Terry335 · 12-03-2007, 10:58 AM

Quote:

Originally Posted by Geezer

Any guesses on what JB2H would make on a catted DP/rest stock application? I have a 6 speed car and 93 octance... great #s as always.

I think around 345rw if I had to guess...

12-01-2007, 11:27 AM	#67
purplewidow Lieutenant Colonel 54 Rep 1,928 Posts Drives: e92 335 Join Date: Feb 2007 Location: Chicago iTrader: (2)	it's mt nevermind...oh and deffinitly not the smoothest...but damn good...i was thinking auto for a sec..only took a glance and noticed the 2 and 4 dips
	Appreciate 0 Quote

12-01-2007, 11:29 AM	#68
uberschnell Brigadier General 703 Rep 4,081 Posts Drives: Wide Body 1 Join Date: Mar 2007 Location: Bay Area iTrader: (48)	Terry, in regards to boost spikes, from what's posted on this forum it appears the boost spikes experienced by some folks running another tune occurred during certain parts of the power band under certain conditions, and were also somewhat erratic. Much of this was uncovered through the use of boost gauges and data logging on multiple cars. It's also been implied that this same thing occurs on stock vehicles to a lesser degree. To what extent has monitoring been done with the JB2 line up to ensure that this is not occurring with your tune? thanks, BTW, this is an honest question and not a flame.
	Appreciate 0 Quote

12-01-2007, 07:31 PM	#75
Beer Goggles First Lieutenant 6 Rep 310 Posts Drives: 2007 335i E92, 6MT, Sport Join Date: Aug 2007 Location: Riverside, CA iTrader: (0)	man some of you guys have no clue. If you turn the smoothing feature of the dyno software off it will look like an earthquake. Little bit of knowledge is so dangerous...
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12-02-2007, 01:58 AM	#76
AU335 Colonel 215 Rep 2,443 Posts Drives: 2007 e92 335i Join Date: Mar 2007 Location: Southeast iTrader: (7) Garage List 2007 335i [0.00]	Looking good Terry!! Great numbers indeed. Its been 3 days now with my JBS2 and . Do you have a rough time-frame when you would be releasing the "Hot" pill? Cant wait!!
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12-02-2007, 03:07 PM	#79
who's ur daddy? Colonel 177 Rep 2,904 Posts Drives: Canada's first and only 323xi Join Date: Aug 2007 Location: Mind Your Own Fkin Business iTrader: (3)	Terry, so the hot pill is a module for people with aftermarket downpipes? Interesting/interested!!!
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12-02-2007, 09:31 PM	#84
who's ur daddy? Colonel 177 Rep 2,904 Posts Drives: Canada's first and only 323xi Join Date: Aug 2007 Location: Mind Your Own Fkin Business iTrader: (3)	Oooh, nice. We have 94 here. And I have the UR catted downpipes. My poor tranny.
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12-03-2007, 06:30 AM	#85
Former_Boosted_IS Major General 353 Rep 5,175 Posts Drives: 4 Wheels Join Date: Aug 2007 Location: Planet Earth! iTrader: (15)	That dyno is smooth guys. I have spent a lot of time at the dyno over the years, and that is a clean dyno. Terry, I have to say that looks really good man.
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12-03-2007, 08:21 AM	#86
Ultimate Racing Lieutenant 30 Rep 469 Posts Drives: 335i, Evo VIII, WRX, STi, 350Z Join Date: Jan 2007 Location: Toronto, Canada iTrader: (2)	Good work, Terry! Glad to hear the downpipes I sent you worked out. We're loving your JB2R over here. Darryl www.ultimate-racing.com
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12-03-2007, 08:34 AM	#87
Geezer Private First Class 7 Rep 157 Posts Drives: F30 Join Date: Jan 2007 Location: New York iTrader: (3)	Any guesses on what JB2H would make on a catted DP/rest stock application? I have a 6 speed car and 93 octance... great #s as always.
	Appreciate 0 Quote