Badass69
Active VIP Member
i too would be interested in your findings with the spark plugs and custom tune. got a 6.0l half ton myself and it does well but more is better.
Anyone know what a custom tune at a shop runs these days? probably cheaper than EFI live.
Depends if you want dyno time or not. I would just get one from Blackbear, Nelson, Wheatley, etc otherwise. I had little faith in the local yocals so that's why I chose to learn how to tune. If you have a truck without the 6 speed ( unless you have that relatively rare 09 Vortec Max) a traditional tune from blackbear is only $200.
EFIlive new for what I have is $900 in the US, and I bought it locally for a grand. After shipping and border crap it's about the same.
And mine is tuned too, lol. It's a 6 liter powered 1500HD and it quite literally was night and day for power. The LQ9 or 07 up L76 would be about the same deal. I run premium in my truck because now it knocks on regular..... but it has 10 degrees more advance at wide open throttle over stock. The 1/2 tons ( mine is really a light duty 2500, has the 4L80e and 9.5" 14 bolt plus the LQ4) are not quite as bad stock...... but damn close.
I mean I own them, I will say it...... they are gutless fuel guzzling turds stock. All of them...... Whoever GM commissioned to tune them should be shot! There are so many limitations in the PCM it would boggle your mind..... and the newer they are the worse that gets.
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