I have been doing a bunch of reading on this forum and some others about mods to get a little more grunt out of my 2.3NA. First, I know a turbo would be the way to go, but we are racing in the 24 Hours of Lemons, and right now they are keeping us in the slowest class (because we are) and I would like to stay in that class for at least another race. A turbo would bump us up, no questions asked. Right now the only mods are that I removed the "spark arrestor" or whatever it is they call those small tubes in the air intake and also a set of headers. A few mods that I have heard about and I am considering try are these: 1.Run an ECU from a turbo car. (I have one available that fits the XR4TI and a Turbo Coupe, E5ZF-12A650-F3D) 2.Run 5.0 injectors (red 19#) and a 5.0 MAF 3.Use rockers/followers from a 95+ 2.5 which are a larger ratio and bring the cam, which is .390 total lift, up to just over .440 total lift. The rockers need to be machined about .050 to fit the older valves. I am really only hoping for 25HP. I want to keep the rpm's at 5500 or below since the bottom end is bone stock with over 160,000 miles and our races are 14-1/2 hours long. I am just interested if anyone on here has tried any of these and what results did you see. Also, is there somewhere I can find the impedance of injectors and/or what impedance an ECU is for?