Do I need a tune after adding a Vararam for a new ZO6?
03-29-2009, 07:12 PM
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Do I need a tune after adding a Vararam for a new ZO6? I am going to install my old Vararam off my 2008 Coupe on the new Z and was wandering if it needed tuning. We tuned it and installed the Vararam at the same time on the last car.
03-30-2009, 12:50 AM
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When we put mine on the dyno and monitored air-fuel ratios, it did lean out up top quite a bit. After the tune, it picked up another ~35-40rwhp. Not required, but recommended based on my experience. I am going to double verify those gains on a different dyno tomorrow. If accurate, that would mean I am putting down 480+ rwhp with just the Vararam and the tune.
03-31-2009, 06:08 PM
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It will probably lean out some, but computer has capacity to learn it to a certain degree. What you need is to adjust your fuel trims. I added Vararam and Kooks header/hi-flow catted X-pipe, and car ran a bit stronger. Bought an unlocked Diablo Predator tuner from a fellow corvetteforum member, added tune and adjusted fuel trims as per diablosport website suggestions, and now car is an animal. Mike
