Quote:
Originally Posted by Circuit Motorsports
So if you add mods you literally need a tune to get any real gains from them. You would also be ensuring the mods haven't caused the car too run too rich or too lean, which is where the safety aspect of it comes in.
If you want us to prove all this to you, we will gladly do so 
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Alright, I don't think I got across what I meant. I'm sure you've tuned a good deal of stage 2 cars. Full exhaust of varying makes, maybe a drop in filter. And I'm sure you don't put these cars on the dyno and start from scratch every time. You have a base map you start with. How many changes would you make to such a base map? I suspect very, very few.
I didn't mean to imply that you can start removing cats and see big power gains without tuning. What I meant was a car upgraded in a typical upgrade path just won't see the value in a custom tune.
My WRX had a ported stock turbo, external wastegate, different boost control solenoid, an oddball exhaust, modified injectors and fuel rail, etc. There's no way I could have used an OTS map on that. There's obviously a place for custom tunes. A car with a couple of bolt ons just isn't it.