1983 300sd turbo

[Ricewannabe]

this car is really sluggish off the line and well i want some performance out of it all the way around so let me know what i can do. i know it boosts well cuz i unbloted the exauhst from the cats today and damn that thing spools. i was thinking of getting a boost controller and gauge for. anytips for me that are low in cost?? remember i odnt know much about this car