2-3 bar map tunning
Jun 26, 2006 | 10:49 PM
#2
Use speed density tuning mainly for race applications.. Its usually reserved for FI guys that run too much boost for the MAF to handle. Noramlly when you do a SD tuner, the MAF is removed
Jun 26, 2006 | 11:49 PM
#3
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From: roy, utah
Originally Posted by TchargedLS1TA
Use speed density tuning mainly for race applications.. Its usually reserved for FI guys that run too much boost for the MAF to handle. Noramlly when you do a SD tuner, the MAF is removed
Jun 27, 2006 | 12:17 AM
#4
No, not on a 6.0L. You can really benifit from a SD tune, whether you're going to race it or not. Oh yeah, and don't eliminate your MAF completely. Your IAT sensor is in there, and you'll want that, unless you relocate your IAT sensor. Any FI vehicle can benifit from at least a 2 bar, because once you reach any kind of boost, the PCM is guessing.
Jun 27, 2006 | 12:30 AM
#5
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From: roy, utah
Originally Posted by vanillagorilla
No, not on a 6.0L. You can really benifit from a SD tune, whether you're going to race it or not. Oh yeah, and don't eliminate your MAF completely. Your IAT sensor is in there, and you'll want that, unless you relocate your IAT sensor. Any FI vehicle can benifit from at least a 2 bar, because once you reach any kind of boost, the PCM is guessing.
Jun 27, 2006 | 01:18 AM
#6
Originally Posted by macs406
So how do you do a SD tune? Do you need a special tuner? If i use a 3 bar map do i tie it into my pcm? I am going to buy alkycontrol with the 3 bar map. Sorry for all the ?'s but I am very new to this. I have my MAF about 3" before the TB, I should be able to drill and tap the beginning of the TB for the meth, right? Thanks for any help.
To answer your questions, an SD (Speed Density) tune is what you have originally posted about: A 2 bar MAP tune. In factory form, the PCM uses input from both the MAP sensor and MAF to determine proper fueling. Add forced induction and now once you go into boost, the MAP input is no longer valid (not capable of reading boost) and the PCM relies on MAF input for fueling.
A speed density tune is one that relies entirely on MAP input, ignoring MAF measurements. To do this in your boosted setup, you will need a 2 or 3 bar Map Sensor and an accomodating 2 or 3 bar tune (ideally with a custom operating system, but possible with stock OS).
Making 12psi of boost on a 6.0L, you WILL max out the MAF at high throttle in the upper rpms, so going to a Mafless 2-bar tune will benefit you greatly.
To accomplish this tune, you will need a Wideband oxygen sensor and a pretty good understanding of how your tuning and logging software works.
Jun 27, 2006 | 11:10 AM
#7
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From: roy, utah
Originally Posted by dc_justin
Being very new to it, you are doing a good service to yourself by asking a lot of questions. Without the proper tools and advice, you can really f*** your motor up quick trying to set up a speed density tune with 12-15lbs of boost.
To answer your questions, an SD (Speed Density) tune is what you have originally posted about: A 2 bar MAP tune. In factory form, the PCM uses input from both the MAP sensor and MAF to determine proper fueling. Add forced induction and now once you go into boost, the MAP input is no longer valid (not capable of reading boost) and the PCM relies on MAF input for fueling.
A speed density tune is one that relies entirely on MAP input, ignoring MAF measurements. To do this in your boosted setup, you will need a 2 or 3 bar Map Sensor and an accomodating 2 or 3 bar tune (ideally with a custom operating system, but possible with stock OS).
Making 12psi of boost on a 6.0L, you WILL max out the MAF at high throttle in the upper rpms, so going to a Mafless 2-bar tune will benefit you greatly.
To accomplish this tune, you will need a Wideband oxygen sensor and a pretty good understanding of how your tuning and logging software works.
To answer your questions, an SD (Speed Density) tune is what you have originally posted about: A 2 bar MAP tune. In factory form, the PCM uses input from both the MAP sensor and MAF to determine proper fueling. Add forced induction and now once you go into boost, the MAP input is no longer valid (not capable of reading boost) and the PCM relies on MAF input for fueling.
A speed density tune is one that relies entirely on MAP input, ignoring MAF measurements. To do this in your boosted setup, you will need a 2 or 3 bar Map Sensor and an accomodating 2 or 3 bar tune (ideally with a custom operating system, but possible with stock OS).
Making 12psi of boost on a 6.0L, you WILL max out the MAF at high throttle in the upper rpms, so going to a Mafless 2-bar tune will benefit you greatly.
To accomplish this tune, you will need a Wideband oxygen sensor and a pretty good understanding of how your tuning and logging software works.
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Jun 27, 2006 | 11:23 AM
#8
Originally Posted by macs406
I have a dynojet WB so I can log my WOT runs. Can I just buy a 2-3 bar map and just plug it and go or do i need to do more mods.
You will need the Wideband to do this, not just for WOT runs.
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