S4 intake manifold pressure chart or map
09-06-2012, 02:27 AM
#16
Rennlist Member
From what ive seen in my limited experience. WCGT NSX with blower vs turbo, and the Rylan s2000 supercharger vs turbo . (both adding blowers on known engines with no other mods), there wasnt that disparity in HP gains.
I thnk rylan got 520rwhp (near 600hp) with a 2.2 liter and 28psi.
are you talking centrifugal or whipple driven blowers?
09-06-2012, 11:18 AM
#18
It isn't a debate so much as just making sure the kibort--world-fact can stays firmly closed.
09-06-2012, 01:28 PM
#19
Rennlist Member
If what you are saying is true..... then, you are saying turbo vs supercharger is almost equivilant to the power gains of one full atmosphere pressure! or in otherwords, the losses on the blower equal to almost 1 full atmosphere!
if you have the PROOF, which i always provide i my debates or discussions, lets see it. or if it has been beat to death before , as AO has pointed too, point me to a thread. Im interested in it, but its not my world. (cept for the little boost devices.
)
09-06-2012, 11:49 PM
#20
Supercharged
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Mark, for most supercharges we make between 15 to 20 RWHP per pound of boost, net. But we consume about 30hp in driving the belt. If we didn't have to power a belt, we would see more hp per psi.
The turbos, however, don't have the same parasitic loss like the SCers, so they often have more hp per psi compared to a SCer. That's not to say it doesn't take some power to drive the turbo, because it does. But it's on the exhaust side where we typically do not worry about it as much.
The turbos, however, don't have the same parasitic loss like the SCers, so they often have more hp per psi compared to a SCer. That's not to say it doesn't take some power to drive the turbo, because it does. But it's on the exhaust side where we typically do not worry about it as much.
09-07-2012, 04:36 PM
#21
In testing on a Dyno simulation software, a belt driven Centrifugal supercharger is consuming 250hp at around 700hp. Turbos do not consume this much.
The data for a 5L engine at 28psi on a supercharger and 15-16psi on a turbo is verified fact.
The data for a 5L engine at 28psi on a supercharger and 15-16psi on a turbo is verified fact.
