...I quite literally build and tune these cars weekly...lol...I'm tuning 3 of them this week.You can say what you will, but you’re absolutely wrong that running the car with a tune and no bolt ons will ruin it. You shouldn’t spout baseless information, especially if you know anything about tunes, the parameters that can be modified can be done without causing damage unless you’re just some boost junkie.
The information is not baseless.
Anyone who knows the engineering of how a catalytic converter works knows they are located and designed specifically for a heat/pressure range...by moving outside of those parameters you wear the cat down...and by adding boost (more air) and fuel, you create more explosive energy which means more heat.
My "long boring posts" are full of information backed by sources. And are there not to entertain but to try and help educate, whether is be you or someone else who reads them...I am not trying to sell anything in this thread. Just giving the knowledge I have learned by doing these cars specifically for the past 8 years.
For example I did 2 1 year long experiments. I took my personal Juke and did full bolt ons to it. Downpipe back exhaust, intercooler, intake, diverter valve. I beat the snot out of it. did 12k miles. No codes, compression test was the same before and after. Then I put a big turbo on it and drove it around another year. No tune. Did 8k miles. No codes, compression test the same before and after. In both instances I saw an increase in average fuel efficiency. And when data-logging the fuel trims where the same as stock, timing was the same as stock, and the air fuel ratios where the same as stock.
The ECU's in modern cars are smart. They know where the maps should all be to be the most efficient and safest. Which is why bolt ons wont give you any power gains. Gone are the days of a bolt on mod changing how the engine performs. Now a bolt on can just increase the efficiency of the air pump (engine) whilst the computer keeps everything at a set target using additional sensors.
As soon as you change the tune, all that built in safety goes right out the window. You are now past what the manufacturer designed the parts to handle. There's a reason you have to sign a waiver when you get a ecu tune.