Bully Dog tuner questions

[wasteoffilm]

There are two different Bullydog tuners
#40410 50-state legal
#40415 49-state legal

Which one is everyone using?

 

[sx sonic]

Many Dodge dart guys messed with the waste gate reference line. Many claimed more power, a few suffered catastrophic engine failures.

A guy on CruzeTalk adjusted the wastegate rod length to up his boost. His engine also failed.

Messing with any part of the mechanical boost controls is not safe. Yea the car might feel quicker and may not go into limp mode, but it is very probable that at some point something catastrophic will happen.

 

[houser]

Many Dodge dart guys messed with the waste gate reference line. Many claimed more power, a few suffered catastrophic engine failures.

A guy on CruzeTalk adjusted the wastegate rod length to up his boost. His engine also failed.

Messing with any part of the mechanical boost controls is not safe. Yea the car might feel quicker and may not go into limp mode, but it is very probable that at some point something catastrophic will happen.

I guess those unfortunate dodge dart dudes should have hooked up a canned tuner before (messin with their waste gates)
If your runnin 20+psi boost and Im runnin 14 psi boost you are the one who should be more worried about catastrophic failure.

Mike

 

[houser]

49th state

There are two different Bullydog tuners
#40410 50-state legal
#40415 49-state legal

Which one is everyone using?

I think Im actually running the 40415. But Alaska is the 49th state so I'm covered.opcorn:

 

[sx sonic]

I guess those unfortunate dodge dart dudes should have hooked up a canned tuner before (messin with their waste gates)
If your runnin 20+psi boost and Im runnin 14 psi boost you are the one who should be more worried about catastrophic failure.

Mike

Well good luck with your wastegate mod.

 

[houser]

Thanks

 

[ranvette]

In service info for the 1.4T engine.Its says the turbo system is designed to deliver up to 20 psi boost.With that being said i don't see a problem at all with tunes running around 20 psi boost.Also keep in mind all tuners i know of set a power target.In my case the target is 200 i can produce up to 21 psi boost to hit that target.But very rarely does the system need to do that.Most of the time it runs under 20.A lot of that has to do with outside temp and altitude.playing with the rod adjustment does not allow the system to control boost accurately.Results seem to indicate around 25 to 26 psi boost is the result.This will drive combustion temps way over desighn limits at 20 psi boost.And really anything over 20 to 21 psi boost should be useing meth injection.But it is good to hear a lot of these engines hold up over desighn limits.Pushing it like that is not for me.But if it floats your boat go for it.

 

[houser]

So thats my point

So that's my point. If your tunes allow you to produce 20+ psi of boost its because you no longer have a waste gate function. It only takes 6-8 psi to open the waste gate once the control valve is opened. you can grab the waste
gate rod with a pair of pliers and push open the gate. there
is really very little spring pressure holding it closed. so weather done by the tuner or done mechanically the effect is the same. the waste gate stays closed to build more boost.

Mike

 

[ranvette]

At 20 psi the waste gate is still being used.It is being controlled my the pc.In other words a tuner can set it for more boost than 20.Without playing with the rod.I think they could command it up to 25 or so.They dont do it because there not in the business of blowing motors up.That can be left to the rod tweakers

 

[houser]

Dont tweek my rod

Well yu wont ever catch me tweekin my rod . But I have found that with the WG tube pinched closed I max out at about 14 psi. And that's just a quick spike between shifts. I think in order to hold the psi up I would have to be on a dyno or in some other way creating a constant load. opcorn:

mike

 

[houser]

I do notice more boost and power on hills with the line pinched but still only 4-6 psi. the tune still hunts for best MPGs and doesn't waste fuel spinning up the turbo.

Mike

 

[sx sonic]

So that's my point. If your tunes allow you to produce 20+ psi of boost its because you no longer have a waste gate function. It only takes 6-8 psi to open the waste gate once the control valve is opened.
Mike

This is so completely untrue.

Here's a good quote, “respect what the factory did and understand why they have done it [before modifying anything]” (Vince Geglia). Tuners can modify the existing boost control parameters but the ECM still has full control of how the turbo and engine behaves and also engine fail safes, everything still works harmoniously.

Rendering the wastegate reference line inoperable removes computer control of the turbo, all the computer can do (regardless of the tuner) is adjust spark and fuel, the computer lost a massive part of its control. Which side of that quote would arbitrarily tampering with the wastgate fall?

Both these articles are indepth coverage of how the computer controls boost.

http://www.wot-tuning.com/forums/topic/236-torque-based-engine-controller-what-is-it/
http://www.wot-tuning.com/forums/to...l-position-on-the-14t-wastegate-actuator-mod/
Boost controller - Wikipedia, the free encyclopedia

. the tune still hunts for best MPGs and doesn't waste fuel spinning up the turbo.

Mike

Hmmm, well for starters during cruise and light throttle positions the turbo does not see positive pressure or is only producing a couple psi of boost, that's basic turbo physics.

And having recorded the 2nd highest tank average on this forum at 55.xx mpg hand calculated after driving 500 plus miles on a tank of gas I must really be wasting fuel spooling up the turbo. opcorn:

 

[houser]

Nice Trifection site Quotes

This is so completely untrue.

Here's a good quote, “respect what the factory did and understand why they have done it [before modifying anything]” (Vince Geglia). Tuners can modify the existing boost control parameters but the ECM still has full control of how the turbo and engine behaves and also engine fail safes, everything still works harmoniously.

Rendering the wastegate reference line inoperable removes computer control of the turbo, all the computer can do (regardless of the tuner) is adjust spark and fuel, the computer lost a massive part of its control. Which side of that quote would arbitrarily tampering with the wastgate fall?

Both these articles are indepth coverage of how the computer controls boost.

http://www.wot-tuning.com/forums/topic/236-torque-based-engine-controller-what-is-it/
http://www.wot-tuning.com/forums/to...l-position-on-the-14t-wastegate-actuator-mod/
Boost controller - Wikipedia, the free encyclopedia




Hmmm, well for starters during cruise and light throttle positions the turbo does not see positive pressure or is only producing a couple psi of boost, that's basic turbo physics.

And having recorded the 2nd highest tank average on this forum at 55.xx mpg hand calculated after driving 500 plus miles on a tank of gas I must really be wasting fuel spooling up the turbo. opcorn:

Im not disabling the waste gate valve reference line. That would block the PSI reading to the ECM. I am blocking the waste gate feed line to the waste gate.
And did I mention? Im not running a stock ECM. I have a Bully Dog GT Tune.
That means Its not the same as a stock ECM tune.

Mike