I can handle the increased lag of the 28rs on the road course. I will have most mods to eliminate lag but not sure it will be enough. Running the rs's at lower boost for the same output should put less heat and stress on the engine. I drove Kuah's car with the 28r's while he was tuning it and I was blown away. It was amazing, but I won't have the built bottom end or the cams as he has.