Quote:
Originally Posted by Wonderbar
Yes, which is why is my earlier statement I said supercharged and turbocharged cars lose about 5% power in Colorado Springs when compared to the exact same car at sea level. If you go by the general 1psi equals about 10-15hp, that would come up to 20-30Hp by both my and vortechs references. Colorado Springs is at 6400ft asl.
I do appreciate the link, however. 
Another .5psi at sea level coming from 3500 feet seems very realistic and another 10hp on the dyno seems about right mathematically. Could see more with higher octane gas and a more aggressive tune. Again, I'm actually being positive towards the product.
Bov's don't, but waste gates do. I should've been more specific in my reference. |
To be clear, using Colorado Springs @ a typical 12 psi station pressure.
And using FI cars that make 5 psi gauge @ Sea Level (14.5 psi), and you drive them to Colorado Spring.
1) An exhaust driven turbocharger with wastegate manifold reference will lose 14.5% power.
2) An N/A car will lose 20.8 % power.
3) A belt driven supercharger will lose 20.8 % power. (PR is fixed).
Turbo's and superchargers are not the same when compensating for changes in atmospheric pressure.
As far as this system at SL coming down from 3500 ft. It will make the same HP/TQ numbers as it does here on the dyno. The difference is they are uncorrected @ SL and real output numbers. It will not make 10 more HP on a SL dyno, it will make the nearly same gains, the gauge pressure will be higher, but the pressure ratio will be similar.