I know that a 2 bar MAP sensor isn't absolutely necessary for tuning with FI, but how much does it help and how much more accurate will the tune be? Is it just a matter of less guess work? I'm never going to take my truck down the track (but it'd be pretty sweet to see a lifted truck on 35's running low numbers ) Does it allow to adjust the VE table while in boost? which i'm guessing isn't possible with a 1 bar MAP

I'm not sure if i'm understanding it correctly, so you can't data log or tune anything in boost because the 1 bar MAP doesn't show over 105Kpa? So how is this done for people not using a 2 bar? Is this the "tricking the pcm" tactics such as rating the injectors smaller than they really are to dump more fuel? I feel like i'm missing something. So basically a 2 bar MAP allows you to read manifold pressure above atm pressure?

I keep reading about people "maxing out their MAF" so they need a 2bar MAP. I understand the concept of flowing more air than your MAF can read, hence people run in SD. How does running in SD affect towing? or does it? Is the load that's created part of the variables in the calculation of SD?

I'm debating on tuning w/o the 2 bar MAP for now to get a better grasp on different aspects of tuning. Or should i get it from the start? In the grand scheme of things $50-60 for the sensor isn't much compared to a $5k blower and $650 tuning system.

Sorry for all the questions. It's a lot to learn and take in and i feel like the more i read and research the more questions i have. Thanks in advance. Tuning software will be HPTuners (in the mail and will be here soon) also will be using an Autometer Wideband

 

Im running a custom operating system on mine... which has another VE Table just for boost... (fuel)
I had a tune to get me by without the 2BAR map...

I think you should just go ahead and do the 2 Bar and be done with it..

I tow with my truck..( its fun, and gets alot of attn)

What size injectors do you have?

 

i'm running the stock Radix setup which i believe is 42# injectors

 

as of now efi live doesnt have custom o.s' for the 06's. and the 2 bar map sensor will make your computer very angry. ive tried it.

 

forgot to mention i'll be using HPTuners

 

AH... didnt know that...

Are you goin to tune it personally?

 

That's the plan... i'm going to try to tune it myself

 

If you are going to tune it yourself then you better make sure you know what you are doing, I would suggest getting a feel for tuning with the MAF still enabled so you have a little cusion until you get the feel for it.

 

I agree, maf makes everyone look like they know what they're doing.

Give yourself a bit of time to read & learn the scanner & how to make the histograms work for you instead of against you, once you feel confident you'll know what your doing once you go 2 bar then go for it, but take it slow.

 

Your best friend at this point is the HPT forums, read,read,read,read. 2barSD is not so much hard to tune but its very touchy because you have eliminated allot of the PCM's ability to correct for changes. When tuning MAF you will get a feel for what changes do what and how big of a change it takes to see a result. Start out with small changes and get comfortable with the software and how it works, once you get the hang of it then look into 2bar tuning. Just dont want to see you damage anything...

I did exactly what I am suggesting and it worked out great.