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      10-24-2009, 03:18 AM   #1
badass1g
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what does jb3 change other than boost?

is it just basically a boost controller? what other things does it change when you switch maps?
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      10-24-2009, 08:03 AM   #2
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Alot of things to name... LOL@ boost controller. I never really tell people to search but in this case it might be best to get the complete info you are looking for. Or visit N54tech.com to get more info on the JB3.
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      10-24-2009, 08:39 AM   #3
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Quote:
Originally Posted by badass1g View Post
is it just basically a boost controller? what other things does it change when you switch maps?
Wow you run a jb3 without even knowing what kind of tune it is?
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      10-24-2009, 09:15 AM   #4
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Originally Posted by enrita View Post
Wow you run a jb3 without even knowing what kind of tune it is?
+1
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      10-24-2009, 10:06 AM   #5
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Quote:
Originally Posted by 5soko335i View Post
Alot of things to name...
Start naming alot of things. Three more signals other than the TMAP is not alot IMO.
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      10-24-2009, 10:08 AM   #6
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To the OP:

B1S1 and B2S1 O2 Sensor Biasing for fuel adjustments
TMAP for basic boost control
Boost Control Solenoids pulse width can be extended for extra boost
Fuel Pressure signal is adjusted for suplemental fueling
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      10-24-2009, 10:27 AM   #7
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^ so boost and fuel
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      10-24-2009, 10:30 AM   #8
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It might make you change your pants!!
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      10-24-2009, 10:44 AM   #9
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Quote:
Originally Posted by scalbert View Post
Start naming alot of things. Three more signals other than the TMAP is not alot IMO.
He asked what changes when you switch maps?

There is alot to it to explain exactly what goes on and how it works like adaption, and what changes with adaption and or whats exactly adapts and what controls what when the JB3 alters these, but adaption and jb3 altering FURTHER signals for the specific higher map//boost is basically what changes when you switch maps, might be more to it but from what i know that is it in brief.

There is alot of good info around here and N54tech that has covered alot of this and explains most of it. Besides all the mini wars within them.

What the JB3 controls is a different question... That also has been covered alot.
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      10-24-2009, 10:45 AM   #10
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When I went from jb+ to jb3 I felt more pull outside of boost. During the gear changes, not at wot, immediately after the change the car has more pull, like its in ds mode all the time.

Maybe thats the auto lag fix or something, i dont know. But there is definitely changes outside of just wot during boost.
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      10-24-2009, 10:46 AM   #11
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It has Vtec.
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      10-24-2009, 11:55 AM   #12
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Quote:
Originally Posted by badass1g View Post
is it just basically a boost controller? what other things does it change when you switch maps?
Functionally, it's a rpm/tps/iat dependant boost controller that also biases the wideband o2 sensors and adjusts fuel pressure.

So it adjusts boost and fuel delivery.

Shiv
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      10-24-2009, 11:59 AM   #13
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Quote:
Originally Posted by shiv@vishnu View Post
Functionally, it's a rpm/tps/iat dependant boost controller that also biases the wideband o2 sensors and adjusts fuel pressure.

So it adjusts boost and fuel delivery.

Shiv
The car pulls immediately after a gear change for me, kinda like its lurching forward ready to go. Even outside of boost and wot. I assume that procede and jb3 do something for low speed driving or maybe the auto trans lag fix?

Ive asked these same types of questions in many forums and still dont have a satisfactory answer for what the tunes are doing throughout all the rpm's. Well, some of the answers are too technical for my understanding.
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      10-24-2009, 12:18 PM   #14
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Quote:
Originally Posted by badass1g View Post
is it just basically a boost controller? what other things does it change when you switch maps?
Your acceleration times.
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      10-24-2009, 12:24 PM   #15
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yes, i definatly know there is a huge power difference. it was once again proven by my trip to the dealer by taking it out and putting it back in (only runing map 3), my boost guage wend from just under 8 without it, to about 13ish, both are peak numbers and then the boost falls with rpm (damn small turboes? or internal wastegates?). and the lagfix is DEFINATLY noticeable as well. i love the JB3 just wanted to make sure i was getting additional fuel to feed that extra boost.
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      10-24-2009, 12:30 PM   #16
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Quote:
Originally Posted by badass1g View Post
yes, i definatly know there is a huge power difference. it was once again proven by my trip to the dealer by taking it out and putting it back in (only runing map 3), my boost guage wend from just under 8 without it, to about 13ish, both are peak numbers and then the boost falls with rpm (damn small turboes? or internal wastegates?). and the lagfix is DEFINATLY noticeable as well. i love the JB3 just wanted to make sure i was getting additional fuel to feed that extra boost.
The best to find out what JB3 does, is to ask Terry! On this forum you'll only hear what it doesn't do.
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      10-24-2009, 12:39 PM   #17
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Quote:
Originally Posted by 5soko335i View Post
There is alot to it to explain exactly what goes on and how it works like adaption, and what changes with adaption and or whats exactly adapts and what controls what when the JB3 alters these, but adaption and jb3 altering FURTHER signals for the specific higher map//boost is basically what changes when you switch maps, might be more to it but from what i know that is it in brief.
The idea is that those signals mentioned are altered differently with the different maps. Ideally, things should be done so as to not to affect adaptation channels. For power delivery you have fuel and timing adaptation. All tunes seem to keep fuel adaptation paramters (STFT and LTFT) close to 0%.

The only significant adaptation is with timing advance. So, yes, a change in map selection will eventually cause a change in timing adaptation; higher maps will inevitably cause a reduction in ignition advance through adaptation or a switch to a lower octane map.
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      10-24-2009, 12:44 PM   #18
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Quote:
Originally Posted by coldasicex5 View Post
I heard that if the JB3 is mixed with uranium, it turns the car into a time machine..
Need to get to 188mph and have downpipes to use that map.
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      10-24-2009, 12:59 PM   #19
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Quote:
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Need to get to 188mph and have downpipes to use that map.
And a Flux Capacitor might help.
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      10-24-2009, 01:01 PM   #20
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Originally Posted by stevetx77 View Post
And a Flux Capacitor might help.
JB4 has one built in.
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      10-24-2009, 01:10 PM   #21
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Quote:
Originally Posted by coldasicex5 View Post
GREAT SCOTT!


Where JB4's go.. there are no roads.
If JB4 is flux capacitor, that makes Terry the Doc. Does that make Shiv, Biff Tannen?









jk Shiv.
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      10-24-2009, 01:54 PM   #22
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DAMN! this is post of the month
haha thanks. Its all in good fun.
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