I just built an LS3 swapped Mustang drag race car and I'm trying to get a startup tune going so that I can get the car running and work out any bugs it has before I take the car to be professionally dyno tuned. I'm also trying to learn HPT so that I can confidently tune myself one day.
Here are the specs on the build:
416 ci stroked LS3, 12.3:1 CR
242/252 .629”/.629” 114 LSA +2 advance custom cam
E85 fuel
Ported LS3 heads
FAST 85 lb injectors. Return style fuel system fixed at 58psi
I started with a stock 2010 Camaro SS calibration and made basic changes from there. I've uploaded my current tune file and the log I made today of attempting fire it up for the first time.
I turned off unnecessary DTC's and made the necessary changes to run standalone. I populated the injector data tables with injector data from a ZR1 corvette because they use the "051" bosch injector which is what the FAST injector starts with before they modify it (if you read on, I found this is incorrect). I changed the stoich ratio for E85. I also scaled up the injector flow rate table from the ZR1 values (around 69% IIRC) to make 85lb/hr @ 58psi.
I've been doing a lot of reading on tuning e38's, but a lot of the tutorials and threads deal with a currently running car that has bolt ons or at the most a supercharger. I'm starting with a build from scratch that has larger displacement, higher compression, different fuel, injectors that don't come with data from the manufacturer, and a custom cam. I want to make sure I'm headed down the right path with the tuning process.
My next move was going to be failing the MAF sensor and tuning VE using Bluecat. Then I was going to back in and calibrate the MAF. In the Greg Banish Calibrated Success DVD he tunes MAF first and VE second, but as it sits the car doesn't stay running. Not sure which I should tackle first. It starts and dies after a few seconds. I think the incorrect MAF values are causing it to die and not related to any sort of VATS problem.
Can you take a look at my startup tune and offer me any pointers on what my game plan should be, or any obvious changes I should make to the tune? I'm feeling a bit overwhelmed with doing a tune from scratch in a fresh build as opposed to a tuning the MAF on a car that just had a cold air intake put on it.
Thanks in advance!
Matt