FORCED INDUCTION Turbos | Superchargers | Intercoolers | H2O/Meth Injection

Do bigger turbos make more power?

Old 01-15-2012, 06:59 PM
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Hell I would love to see data on mine...
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Old 01-15-2012, 08:43 PM
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I have a gauge for that
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Originally Posted by smokeshow
No, I haven't seen any IE maps. I would like to see some...but AFAIK it costs a shitload just to get the VE maps. I don't really expect to see any isentropic data on compressors.
Yes you have. All those efficiency islands you see on compressor maps are isentropic efficiency, not volumetric. Both sets are often available for superchargers.


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Old 01-16-2012, 01:52 AM
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Originally Posted by Swerve7rpm2000
If i cared about Displacement i wouldnt have a turbo! Now the good luck, ive gotten my truck in the mid 10's with my own tuning and built the whole truck why do i need luck keeping it together, Big Power will eventually = Broken parts anyhow, like i said ill get some solid numbers for ya from going to a 88 mid frame a 91 large frame at 15#'s just stay tuned
Im not doubting your abilitys, and I believe you missed a little friendly sarcasm....But, for real, a turbo can never make your engine hold more air IE volume is a measure of area not density. And the keeping the engine together part was just saying that you can not increase the volume (known as engine displacement) without opening it up to another atmosphere
Old 04-20-2012, 09:27 PM
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Originally Posted by marlboroman71818
still wouldnt change volume under pressure.



yep i know exactly what VE is and what does that have to do with what I said about VOLUME. What VE is about is preventing compressor surge and excessive heat. Here is a good read for you http://www.engr.sjsu.edu/ndejong/Com...troduction.pdf . And yes they will move the same VOLUME of air into the same engine at the same pressure, the engines volume never changes and PV=nRT. And at the same pressure they both have the same density of air if the temperature is constant, which it wont be. The smaller turbo will have to spin faster to do it creating more heat and a loss of power causing you have to add fuel to mitigate detonation. Causing another loss of power due to being to rich.

So, what you are telling me is that a larger turbo is going to magically increase the cyclinder capacity and the displacement of an engine? Good luck with that and keeping one together.

if that was true, explain how the same motor lsx 427, makes 988rwhp on 17psi with a 91mm, swapped to a 106mm and on 16psi make 1107rwhp
Old 03-26-2013, 06:24 PM
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Originally Posted by Swerve7rpm2000
If i cared about Displacement i wouldnt have a turbo! Now the good luck, ive gotten my truck in the mid 10's with my own tuning and built the whole truck why do i need luck keeping it together, Big Power will eventually = Broken parts anyhow, like i said ill get some solid numbers for ya from going to a 88 mid frame a 91 large frame at 15#'s just stay tuned
Bjmp for update????
Old 03-26-2013, 06:33 PM
  #66  
I have a gauge for that
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I take it you werent satisfied with the discussion in the other thread?
Old 03-27-2013, 01:27 AM
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I wanna hear if his move from the 81 to the 91 was worth it.
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