Interesting article on BOOST and HORSEPOWER

Boost and Horsepower

 

The general rule of thumb is that, not accounting for temperature-induced power losses, a turbo will increase horsepower by about 7 percent per pound of boost over a naturally aspirated configuration, and a supercharger will increase it by 5 or 6 percent per pound of boost. The supercharger's return is a bit lower because it takes power from the crankshaft to turn the compressor, which a turbo does not. If your example engine makes 150 horsepower naturally aspirated, then you can estimate an extra 10.5 horsepower per pound of boost with a turbo and 7.5 to 9 more horses for a supercharger. If you're running 8 psi of boost, then that's an approximate 234 horsepower with a turbo and 210 to 222 with a supercharger.

 

Read more: http://www.ehow.com/info_10009983_horsepow...l#ixzz2jdxkX4IK

 

 

 

GALLARDO TT:

-Lets say a factory rated 2008 Gallardo Superleggera makes 523HP Naturally Aspirated (may not be accurate but then again it may be close to the truth with a little lower compression, no cats, straight exhaust, etc..)

-7% of that is 37 horsepower per PSI.

-If you want to make 1000HP, it would be 14 psi x 37 horsepower= 518HP from boost plus 523HP Naturally Aspirated for GRAND TOTAL=1040HP

 

I found this random article which knows nothing about our cars at all but is really close to being accurate and I thought it was interesting. This would put a Gallardo at the following rough calculations...

 

14psi= 1040HP

20psi= 1260HP

25psi= 1448HP

30psi= 1633HP

35psi= 1818HP

 

Obviously this can't be completely accurate based on it just being a blanket statement with turbos and it doesn't figure in small or big turbos or how efficient these motors are.

 

If you have a GTT, please comment how close you believe the above estimates are.

 

That is actually scary close! That is a nice article, thanks for sharing.

 

Looks right on the money for my last two TT cars.

 

For every 1 atmospheric pressure you raise boost you should double the power. I think that is the general rule but I do not know for sure.

my makes ~1030 whp @ 16 psi and ~1230 whp @ 22 psi

my makes ~1030 whp @ 16 psi and ~1230 whp @ 22 psi

 

Now add in a little bigger turbo then what you have and the numbers get even closer.

too many other factors to make this rule of thumb but it might be close in many cases.

 

turbo sizing/efficiency at respective boost levels, intercooling efficiency, motor volumetric efficiency.. goes on and on.

 

 

Nice decimation, Lambofan. Your car looks fantabulous!! icon_mrgreen.gif