This thread is a perfect example why its such a waste of money tuning a 172/182 engine
£2.5k spent to get 15-20bhp is simply shocking
You can get an extra 20bhp on some turbo engines by fitting a £5 bleed valve
Wouldn't say it was shocking. Anything without forced induction is always going to cost more vs fewer gains but turbo's arn't the be all and end all. They have their own hurdles, lag, mpg etc etc