sup guys, im looking to put a s100 in my p28. im running a d16 lightly modded with intake, header, racing cat, ground kit, **** like that not much else. what kind of performance gain can i expect? im having it dyno tuned. thanks guys

 

those mods won't be enough to get a lot out of a good tune. those mods don't even require a tune, get a cam and cam gear, then you'll have something to work with

 

Though you would still get more out of a cam and gear too, you can still get something from tuning just about any car with any mods. Don't expect a lot of gains, but this way you have a base line for your future upgrades as you go one. Maybe even do a pull with just your stock ECU, get a number, then do the S100 and start tuning, and see the end results. That why you know, how much your current set up grades, and any future things can do for you.