ls4_newbie

Hi guys. I'm trying to get costs together for tuning a ls4 engine. I'm looking to fit one to a fwd drag (to be different in some respects). I'm already looking to run it it on a carb with nitrous. But I'm unsure where sells aftermarket tuning parts for these engines, I'm going to turbo it eventually, in the meantime I'd like to see how much horsepower and 1/4 times I can do without a turbo/supercharger but within a reasonable budget.
Cheers