LBZ Smoke control

[Killerbee]

Curious if anyone has tracked down a good way to limit fuel/air ratio, so as to minimize smokescreen.

Also, what are the differences between LLY (05) and LBZ injectors? Seems that the same PW provides greater performance on LBZ, but that may be the added pressure.

 

[RENODMAX]

A good way to limit air/fuel is maf. For someone who sold efilive you think you'd know that

 

[Killerbee]

I am referring to spoolup smoke resulting from excessive equivalance ratio.

Looking for suggestions from those who feel they have successfuly tamed the mixture imbalance that is natural on wide open tunes, during spoolup. I have played with various available limiters, but there is no apparent MAF fuel limiter, so keeping the air clean is harder, not that anyone here is overly concerned about that.

 

[Dozerboy]

So you want someone else to post their hard work so you can sell it to your customers? Maybe if you had enough spine to call some of the real tuners out there they would be willing to nudge you in the right direction. But then one of them would have to like you then....:dontknow::stirthepot:

 

[Diesel Pilot]

So you want someone else to post their hard work so you can sell it to your customers? Maybe if you had enough spine to call some of the real tuners out there they would be willing to nudge you in the right direction. But then one of them would have to like you then....:dontknow::stirthepot:

This does nothing to help the OP's question.

Not the way things are done around here rather you like KB or not.

 

[RENODMAX]

I am referring to spoolup smoke resulting from excessive equivalance ratio.

Looking for suggestions from those who feel they have successfuly tamed the mixture imbalance that is natural on wide open tunes, during spoolup. I have played with various available limiters, but there is no apparent MAF fuel limiter, so keeping the air clean is harder, not that anyone here is overly concerned about that.

A "wide open tune" is as vague as you can get. The answer is still the MAF and Timing. Pretty simple. You just need to spend time tuning trucks and not asking how.

 

[JoshH]

Rescaling the MAF sensor tables will change how much and when fuel is brought in while spooling. The only problem is it makes the truck very unresponsive in normal driving (at least in the very little bit that I played with it). We need a table like the LB7s and LLYs that gives us MAF and RPM on an X and Y axis and a fuel quantity as the values so we can limit fuel for a given RPM and MAF value.

 

[LBZ]

Rescaling the MAF sensor tables will change how much and when fuel is brought in while spooling. The only problem is it makes the truck very unresponsive in normal driving (at least in the very little bit that I played with it). We need a table like the LB7s and LLYs that gives us MAF and RPM on an X and Y axis and a fuel quantity as the values so we can limit fuel for a given RPM and MAF value.

I agree. Has anyone ever asked EFI about or for this?

 

[JoshH]

I have multiple times. They say there isn't such a table, but I know that there is something that uses MAF to limit fuel.

 

[LBZ]

Got a link to a thread on it Josh? I'll bump it again if so.

 

[wikdlmm]

All I know is when I hammer the throttle there is smoke..!!!:hug: thanks to Josh

 

[JoshH]

Got a link to a thread on it Josh? I'll bump it again if so.

http://forum.efilive.com/showthread.php?t=9368

All I know is when I hammer the throttle there is smoke..!!!:hug: thanks to Josh

That's because you need more air!

 

[Mike]

A "wide open tune" is as vague as you can get. The answer is still the MAF and Timing. Pretty simple. You just need to spend time tuning trucks and not asking how.

Be nice. Someone has clearly stolen Michael's user information and posted this question. I mean, after reading all the info in his profiles on all the sites including posts, this has to be the only acceptable conclusion. Please, be easy.

 

[LBZ]

Josh do you think this missing MAF table could have something to do with the throttle stomp delay in my other thread? I need to get home and mess with this some more. It's really driving me nuts!

 

[x MadMAX DIESEL]

Josh do you think this missing MAF table could have something to do with the throttle stomp delay in my other thread? I need to get home and mess with this some more. It's really driving me nuts!

I know the truck starts picking up speed faster than it did before I adjusted it. But the new fueling just made it feel like less of a pause I guess. There is still a delay, just feels like the truck grabs alittle bit sooner. Still have alot of tinkering to be done on the LBZ delay

 

[LBZ]

I haven't totally wrote off the fact that part of my issue has anything to do with my crappy trans, but in respect to how to get rid of the smoke KB is asking about, I have a tune from another member here that is about 80hp tune that doesnt smoke anymore than stock so I believe the tables to control that are already there.

 

[JoshH]

It's not hard to make small tunes not smoke. Even large tunes can be made fairly clean. The biggest problem I've had is when you up the injector size, things tend to get a little more smokey.

 

[Bako_Dmax]

Is there a way you guys are rescaling the MAF on the LBZ? Or are you just trial an error to see what works best?

I havnt messed with it much Ive selected "Not Fitted" before and by doing so my truck at WOT would only allow 2800 shot of fuel when the tune calls for 3100microseconds.

 

[LBZ]

I just noticed that not fitted button last night along with a few other tables that must have showed up in the last update. I was wondering what happened if it was selected.

As far as MAF goes I think it's just a crap shoot as there is no other MAF table to go by. You just need to log it, see what it's doing and make changes from there. Josh H is pretty good at this I think.

I believe the LLY's have 2 or 3 that can be used to rescale/adjust MAF which is what I wish we had as well.

 

[Mike]

I can only see one reason for rescaling MAF. True, changing or scaling MAF will produce a result but this only induces fuel for a somewhat lower a/f ratio. What I mean is, rescaled to 80lbs/min total and 50lbs/min where say 20lbs/min resided will give the software a higher number of charge to recognize and therefore fuel.

The only reason I would rescale is if a charger is placed pre-MAF sensor. This is because say 15lbs/min is now 30lbs/min with a pressure ratio of 2 and adiabatic equal to pre-charge levels.

On edit: One more reason to rescale would be to compensate for temperature changes if the MAF is not temperature compensated. Also pipe size but that one is very tricky with out actually modifying depth of MAF in pipe.

Supercharger Pre-MAF