He would then basically tune it for gas and for E85 separately at the extremes and the flex fuel component will tell it how to perform given the fuel on hand. bigger injectors (what would be a good 36-40 pound injector that are the same physical size as the stock injectors, if any?) He suggested for my set up I'd need injectors in the 36-40 pound range (what is the rating of stock LS2 injectors?). The wire then gets plugged into an open port on one of the ECU plugs and the harness plugs go in on one of the injector plugs. I assume the install is to disconnect the fuel line at the fuel rail, install this onto the fuel rail and the fuel line onto the new contraption. This is the kit he recommended (he doesn't sell them, just what he has had the most luck with): He said that upgrade alone may be worth as much or more HP as the FAST I just put on. I never really thought about it, I thought E85 was pretty much the domain of boosted cars.Īnyway, he recommended the DSX Tuning flex fuel kit and then to upgrade to larger (perhaps LS3) injectors. In talking to my tuner guy (who also owns a GTO) and he suggested a bit more can be accomplished with an upgrade to a flex fuel system and running E85. I've decided to go beyond the etunes and get a local dyno tune. It is a stock LS2 long block with an underdrive pulley, shorty headers, high flow cats, a ported LS2 TB and a tune up to date for everything but the FAST.
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