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Message: <blockquote data-quote="ALBundy" data-source="post: 484962" data-attributes="member: 15">Zam, you the headers and piping all done? To tune stock ecu may not be as easy as it seems. The tuner must be well versed with the various maps stored in the ECU. There are more than 60 over maps and he has to extract the right map and then key in the proper values. And that involved a lot of guesswork as well. Most of the tuners have a ready map for specific application like the type of turbine you using, headers and etc. If you plan to keep the cost down the easiest way is either to install an adjustable fuel regulator (popular with the mosselman turbo those days) or an Unichip Piggyback with boost controller (all in 2500).</blockquote>