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tuning help
engine is a 6.0 with a summit 8707 cam and springs,4l80 trans shorty headers with 3" exhaust to a x pipe to black widow exhaust. I sent truck to a tuner and it runs like crap. i recently got hp tuners and am starting to navigate around with it a little but am still very new to the tuning side of things. Could someone look at the current tune and kinda give me a idea on where to start. from what i can tell all he did was a vats delete and thats about it.
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Open your stock file, then modified file as a comparison. Then select the tab "compare", select view comparison log to see what was changed. I don't know the specs for the cam you mentioned but will assume it's gonna need VE tuning and timing. A log file of your problem area will be helpful.
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I did that already and from what I can tell is he did a vats delete that?s all. Before it went to him it could idle and almost run good enough for me to log but now it won?t even stay at a idle
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226/238 113+3, .600/.600 Lift, Specs on cam
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That's a big camshaft for a stock stall converter and you need larger injectors before you really start tuning this.
For the time being you can increase the idle rpm to 750-800 when warm. Add like 10-15% to the whole base running airflow table.
Set the idle timing for park and in gear to like 18-20 degrees in the idle area's. Set the over/underspeed spark correction tables to -8 and + 8 degrees.
Those are just some simple basic things. But you still need larger injectors, you need a wideband oxygen sensor for tuning as well.
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Ok I?ll do that and what size injectors would you say to run with that cam
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31lb/hr or larger. You can use stock 8.1 injectors or stock flex fuel injectors from like a tahoe/suburban, those are 33lb/hr.
Some guys use the later flex fuel injectors which at 50-52lb/hr and a guy on here has all the data for them. I think his name is Blindsquirrel, it's in his signature for the data.