hey ya'll, im about to purchase some 19 inch ssr rims. And i was wondering, would it effect my quarter mile time by effecting my suspension?

 

By saying "your 18 inch" you mean what? OEM?
The 19 inch combo with more rubber most likely will be heavier than any 18" combo and you will be slower.
P.S. Just buy the wheels and tells us your results and if they really affect performance that much... =)

 

well judgin by your mods, go with 17s and wide tires. The only advantage to having 19s is that most of them come in 10.5 wide wheels so you can fit meaty tires. i think in this case, get the RPF1's in 10.5 rear. Light and wide.