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Potential Tuner
Help with 5.3 tune
I am new to all this and could use some help. I have 2002 5.3L with flat top pistons, a cam and long tube headers. I have the stock truck intake on the engine. I am running a 4L60e transmission out of the same 2002 Silverado with a np208 t/case and a dakota digital VSS that runs a 8000 pulse insted of 40000 on the gm one. It is in an 1986 K5 Blazer lifted on 35" tires with 3.73 gears. I am looking for some tune files to help me figure out what i need to do to make this thing run good.
Cam Specs:
Advertised Intake Duration: 261
Advertised Exhaust Duration: 265
Intake Duration at .050 Inch Lift: 208
Exhaust Duration at .050 Inch Lift: 212
Intake Valve Lift: 0.554
Exhaust Valve Lift: 0.558
Lobe Lift Intake: 0.326
Lobe Lift Exhaust: 0.328
Lobe Separation: 115
Intake Centerline: 111
Exhaust Close ATDC: -13
Exhaust Open BBDC: 45
spec-card-valve-timing
Intake Open BTDC: -7
Intake Close ABDC: 35
Any help would be appreciated
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As small as that cam is, your stock 2002 calibration file will be a good start. I'd start by increasing the idle speed to 650 rpm, add 10-15% to the BRAF table, then you can start tuning the VE table. It shouldn't require a lot of work.
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Potential Tuner
Alright thanks for giving me some direction. All this tuning stuff is new to me so i will take all the help i can get.
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Tuner
spark tab work high octane and low octane tables, add some timing but first log and see what areas you can use timing.
under fuel go to power enrichment and command a good # for n/a somewhere around 12.4 after modifying the enrichment as well.