I have a flex fuel truck with a Radix 112 running a 3.3'' pulley and making 7~7.5lbs. of boost on a 5.3L. The stock FF injectors are 38lb. and the fuel pump is a higher capacity than the stock(non FF) pumps as well. I have not been able to find any specs on the FF pump but I spoke to to some techs at Magnacharger and they told me they really like the FF pump vs. the stock pump. Lyndon from Westers also told me that I would not see any issues using this combination. Don't know what my IDC is but I have logged and watch my AFR gauge and have never seen it lean out on any WOT run.

 

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