it depends what t28 you have lol.
s14 t28 = 275-290
s15 t28 = 300 on its own. 320-330 with cams/greddy intake.
FP Big 28 = ~330-340 w/cams intake (possibly more?)
GT28RS (disco POS) - 320, 340-350 with the right parts.
Thank you! There are many different t28's and each one has slightly diff.#'s. With stock injectors and MAF he is right about not doing more than 250HP, but the TURBO is good for roughly the numbers above. I'm looking at the 320 range for mine after injectors, MAF and tune. of course I may need cams to get there so we will see. Good Luck, and get a ROM TUNE!!