LT5 cam installed in '16 SS, running rich

[raidaru]

Hi there fellas, I've installed a LT5 cam in my SS as I disabled the DoD. Problem is the idle is kinda rough, up to 100rpm fluctuations and the LTFT on both banks is steady -10. Also when I floor it. black smoke comes out of the pipe. Only mods is lt5 cam and some dual valve springs. Any idea what should I try to change? I know a wideband and some logs would be great but car is unregistered and we've only got a small track in the area, prolly could do only short pulls....

[Ben Charles]

Something is wrong, the cam specs on that cam are basically identical to what you have stock but with increased fuel lobe