http://michigansnowmobiler.com/hptun...ons%20rev2.pdf

I used this site when learning to tune, hope this helps

 

Okay thank you guys for the help. Much appreciated. Ill take time to read trough that and see if it helps. So should i leave closed loop offor reenable it? What about running maf-less and using ve table to tune?

 

Till you max out the maf (doubt you are close to doing that yet) I would keep the MAF.

Once I am not in my phone I can help you set up HP Tuners to get the maf dialed in.

 

That would be nice. If you want to, just pm me or anything.

 

The right way to do it is to tune it in open loop and use a wideband - you don't want O2 feedback changing your fueling while you are trying to tune it - you will be chasing your tail...
First I set the Power Enrichment and Open Loop fueling tables to sane values that I want to correct the VE and MAF tables to.
I disable the MAF and tune the VE table first (contrary to what was said above, it absolutely does effect fueling even if you run a MAF). Once the VE table is correct, I put the MAF back on line and then tune the MAF table. Tuning these tables is done by correcting the tables so that the wideband reading is the same as the Open Loop and Power Enrichment values set above. I do this using a correction factor (how it is done depends on your software).
Then, put it back in closed loop and see how the LTFTs look - they should be in line at this point, but may require some more fine tuning. If they are off much, it could indicate an exhaust leak skewing the O2 feedback.
This is a quick summary of how it is done...

 

here is a base tune i did for you, it is already in open loop and should provide a base to what you want to do
you will also need bigger injectors, 32 lbs from the nnbs work good.

 

Thank you! I will install the tune tonight and see how it goes from there. Oh and how can i make those injectors work? I already had some injectors installed from a 6.2 nnbs denali and i could not make them work in any way. Later tried some 5.3 nnbs injectors on a 4.8 nbs and didnt work either. Is there something i need to do in order to do that?

 

Did you adjust the settings in the tune for the different injectors?

 

I downloaded a spreadsheet for converting from ls1 to ls3 injectors. Didnt work. My friend put and ls3 in his camaro, used stock ls3 injectors with stock ls1 ecm and it worked without adjusting anything.

 

what injectors are in the truck now?