Originally Posted by
jagy Shawn B: ok, i leave stock cat.. but isnt cat smaller size than 2.5"?
Can anyone tell me if is ECU tune needed or its 100% safe to run this S4 cams setup without ECU tune? Im afraid of engine will run lean.
I've got a stock ECU on my setup now. I don't have the tune YET but I want it eventually to get more power and better mileage.
As it IS, IN order to have a smoother idle, I've got the timing setup to 17* and the idle is at about 1000-1100rpm so it smooths the cams out a bit. I like the setup alot. It's on the raw side which is what I love about my Classic the most.