On a recent build LS3 stock long block, SLP supercharger 2.8 pulley JRE cam LT headers JRE flex fuel conversion and JRE flex fuel tuning, made 741 RWHP 678 RWTQ on E-81.
Gains over 93 pump gas, 90 RWHP and 80 RWTQ just by switching fuel only, no tuning changes.
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