Powerfc And New Exhaust

[Hulk1010]

my cars battery was disconnected for a few days while some repairs were being done, also i'm getting a replacement exhaust "whole exhaust", what i want to know is has any of this affected my powerfc tune, do i need to get it retuned or should i just get a dyno run to see if everything is ok?

thanks

[R31Nismoid]

You'll probably need a rough touch up, but not a full tune.

The exhaust might alter it a bit if its more free-flowing than the previous, but there wont be much difference unless the exhaust was super restrictive.

The battery off thing wont affect it though mate, all good from that point of view

[BAMR33]

Your tune will be fine, regarding the battery. Wouldn't hurt to get a $100 check up on the dyno after the exhaust, less back pressure can have differing affects to your tune.

[Hulk1010]

So i got a dyno run today, finally, and the car only made 158rwkw as opposed to it's 190rwkw before i got rear ended. All that was changed after i got hit was my exhaust from the cat to the muffler, I got a better muffler this time a stainless steel magnaflow. They guy who I took it to was very helpful and said that the cat itself could be damaged which could be causing the drop in power or just that the timing is out and I need to get it re-tuned. I'm gonna try and get a re tune in the next 1-2 weeks hopefully. The funny thing is the car drives very nicely. no popping sounds, it starts up perfectly in the morning, it's just the drop in power for some reason, also there no missfires or anything like that.