Ls3 Supercharged A6 Please Look @ My Tune

[neoh2ning]

2008 corvette having alot of problems tuning the maf please guys let me know give me ideas i dont want to keep getting the air flow values down cause im worried to get the transmission going crazy on me

[RWTD]

A few questions, what injectors do you have in the car? Why are you having problems tuning the MAF? That MAF arrangement won't peg on that particular pcm, since you have a very large range of MAF room in the calibration.

[neoh2ning]

i have 60# injectors i think i have problems on my IFR so i have to adjust on maf and i think that why my tranny is going crazy

[MyLS1Hauls]

i have 60# injectors i think i have problems on my IFR so i have to adjust on maf and i think that why my tranny is going crazy

Don't ever tweak the MAF to make up for IFR errors...Set your IFR up correctly for the injectors, then go back and set your MAF table back to stock, and check your trims. What 60# injectors are they? The Siemens Deka/Mototron ones? If so, they are actually 73# at 4bar fuel pressure.

[neoh2ning]

how do i adjust the ifr if my limit is 63

[neoh2ning]

i talked to the guy who sold me the SC kit he told me they are siemens 60#

[MyLS1Hauls]

You need to use the "flow rate vs. volts" as a multiplier. Setup your IFR as if they were 50# injectors. Use the spreadsheet from EC Tune to get your curve correct. Then set all of the values in "flow rate vs. volts" to "1.46". This will then get you your 73lbs/hr at 4bar that your injectors actually flow. They are 60# at 3bar fuel pressure, but 73 at 4.

EDIT:Here are the values for your IFR table, as my version of the EC Tune spreadsheet doesnt properly setup the values for the LS3 when changing fuel pressure.

28.29 30.00 31.63 33.17 34.65 36.06 37.42 38.73 40.01 41.24 42.43 43.59 44.73 45.83 46.91 47.96 49.00 50.01 51.00 51.97 52.92 53.86 54.78 55.68 56.58 57.45 58.32 59.17 60.01 60.84 61.65 62.46 63.25

[neoh2ning]

thank you a lot will let you know how it works i will try it today

[MyLS1Hauls]

thank you a lot will let you know how it works i will try it today

No problem. Keep us updated

[neoh2ning]

got all the settings right on the ifr table and multiplier got my air mass table nack to stock and guess what I HAVE A NEW CAR thank you guys for all the help will post the numbers as soon as i get done on the dyno las time was 535 with all this mess so im hoping to break close to 600 thank you again guys

[RWTD]

You need to use the "flow rate vs. volts" as a multiplier.

FYI, the flow rate modifier will NOT work past the 63.5 IFR limit. At least this is what others have said on the V8 vehicles. There's several threads about this already.

[neoh2ning]

here is a log file after the IFR changes and some street tuning

[vettetech]

Dam thing dets with no timing, you batter ad more fuel to da bitch.