Backfire and popping under acceleration...Im out of talent

[koryenger]

Hey guys just looking for a little help. Pretty sure I am out of tallent...427 LS3 Cam specs attached. The intake has 2 filters, one side is blocked off and the MAF is located within 4-5 inches of the air filter. Horrible hesitation/backfire right off idle while driving. Also does it under free rev conditions. Truck will clean up around 1600 -1800 RPM and accelerate fine. I cant seem to get rid of the low end backfire/popping. I have gone lean and rich in the P.E with no change. B2013 Dynamic Impact airflow, got a little better.... MAF trims are spot on. What am I missing???
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[joecar]

Can you post log files.

Where is the MAP sensor...?

[joecar]

Your MAF sensor is on one of the intake runners...?

[joecar]

Your cam has has 23 degrees overlap @.050, it produces quite a lot of reversion, the MAF will see this, especially being so close.

[koryenger]

Hi Joe, thanks for the reply....the MAP sensor is in the stock location just behind the throttle body. Not sure what you mean by the cam having 23? Here are a couple of logs I took this morning...by all means please let me know if you see anything.pop.efipop2.efi

[joecar]

sorry, somehow I didn't finish typing, I edited my post.

[joecar]

What intake manifold is it, can you show me some more pics of where the MAP and MAF are located.