what can i put on in regards to a high performance ecm, and 205/50 R 15's ????

[kozakievichsteve]

i have two questions. my 91 240sx is stock and i'd like to install a high performance ecm or ecu. what would be the best unit to buy. also i'm putting alloy wheels on the car and was wondering if i could go from stock 205/60 R 15 to 205/50 R 15 without having to worry about the tires rubbing on the inside against the struts or the outside against the fenders.

[adrianfromthecastle]

unless you're upgrading your injectors or mafs (or anything else under the hood), I kinda don't see much point in touching the ecu.

as far as switching from 205/60 to a 205/50... there will be no issues.. although I'd recommend getting a 205/55 rather than a 50... the O.D. will be better and won't mess with your mileage as much.