He may do, but the reply is still the same! A turbo consumes power in order to boost overall performance. There is no free lunch....

 

So, he didn`t get the intake gases cool enough?

Way back in the early 80s I had a Yamaha 650 with and ATP turbocharger. It had a wastegate set at 6.5 psi. While that was a big improvement over stock, it wasn`t enough for me at the time. So I opened the waste gate and let it boost to 15 psi. Then that little bike was blowing off the big bikes, especially the Ninja bikes of that era. The problem I had at that boost was burning up exhaust valves. At the time the only available fix was water injection for the intake gases. I tried that, and while it worked better and the top end lasted longer, it still wasn`t good enough to cool the top end to the point where it would last more than a few months. I got real good at rebuilding the top end though, until after the last rebuild a piston cratered the bottom end and the engine was trashed. I didn`t feel it was worth fixing and junked the bike.

 

There's a lot left out here. How much boost? Which turbo? What engine? is the charge air being cooled? What is being used for tuning? Has the engine been build to handle the horsepower goals? Does he keep getting knock? Can the fuel injectors keep up? Cant just slap on a turbo, crank up the boost a lot and expect it last. That's no different than putting nitrous on, pushing a 100 shot through a stock engine and saying nitrous sucks when the engine keeps blowing up.

 

technically, there is NO free power anywhere. even turbo has losses. however, when you can get several thousand horsepower from 150>175 psi expanding gases the little loss is minuscule to say the least. of coarse, gas flow rate or volume does make a diff!!!