Two Tees

I remember reading from this forum that somebody wrote that increased boost doesn't mean increase in horsepower. Sorry I am new to turbo charging, but is it really so? Why is that? (because I read from a local mod mag of a TTq increasing the fuel pressure would increase the boost from the standard 0.6bar to 0.8bar, and tempted to do the same) Many thanks for any advice given..

Agent911

boost = more pressure = more air. more air = more power.

however, when you increase boost - the air gets hotter due to harder compression. if you don't try to cool this air (i.e intercooler)to a certain degree, you are not getting power, but a lot of heat in your engine. (well the more energy has to go somehwere, and it turns to major heat).

boost is only good, if its down to a certain temperature.

AkRascal

Neat sig

zapta

For the same presure and volume, hot air contains less oxygen (and less air). I think this is why the intercooler is for.

ND4SPD

Close... Hot air is less dense. Not less Oxygen.

zapta

Doesn't less denser air implies less oxygen per volume unit ;-)

ND4SPD

But you made it seem as if the ratios of gasses in the air would shift, whereas the more important concept is that the air is less dense.