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Scion tC 1G Forced Induction Turbo and supercharger applications...

Dezod Motorsports Tech Post: Boost Pressure (excellent read)

Old Oct 6, 2007 | 03:32 PM
  #21  
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I was kidding!
Old Oct 6, 2007 | 10:05 PM
  #22  
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Originally Posted by paul_dezod
Originally Posted by chaseonbass
Duh I knew all of that already! That is sooo common sense!
You'd be suprised on how many calls we get that people do not understand this.
I can just imagine someone seeing this and pulling over on a trip in the mountains or something..adjusting the boost so it reads 6psi or 10psi again. Then returning home and wondering why they blew something.
Old Oct 7, 2007 | 05:44 AM
  #23  
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Hey wait, I thought
Originally Posted by paul_dezod
Boost gauges read relative pressure.
but
Originally Posted by Tony1
haha, i didn't know it was a big problem either.
And yes, Absolute pressure and Gauge pressure are generally what it is called.
Old Oct 8, 2007 | 12:27 AM
  #24  
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I got a question. Why is every gage that I see rated up to 30 psi . It seems that 12psi is on the high end and they go up to 30. Just makes my boost pressure seem minimal
Old Oct 8, 2007 | 02:49 AM
  #25  
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8psi is low boost.
Consider this, the stock MazdaSpeed 3 is hitting it's 250 or so hp at (I beleive) 15psi!
Old Oct 8, 2007 | 03:27 AM
  #26  
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Yes 8psi is reasonably low, but for all practical purposes running 15psi in a stock Tc motor is asking for trouble. I just did not know if there was a reason for upsizing a gauge. I know in welding applications it is recomended that you go 200% on the gauge to what you expect to be working with .
Old Oct 8, 2007 | 03:38 AM
  #27  
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i love lamp
Old Oct 8, 2007 | 07:41 AM
  #28  
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^ lol what's that all about?
Old Oct 8, 2007 | 02:09 PM
  #29  
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^^^ NEEEEERRRRRRRDDDDSS!!!! I love that movie
Old Oct 8, 2007 | 02:13 PM
  #30  
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Originally Posted by Tony1

60kpa is 8.7psi, not 6psi

From personal experience racing all over the country, in Denver (about 85kpa atmospheric pressure), we were seeing about 5-8psi less boost compared to when the turbo was maxed out at sea level.
Typos are the death of me........for sure. I am t3h suxorz at stupid lil typos.

The last point is exactly what I was trying to convey Tony, but keeping it VERY simple under the K.I.S.S. laws, however I did not want to breach dyno figures into the equation because that spins off a whole different ball of wax and even more heated debate.
Old Oct 8, 2007 | 02:15 PM
  #31  
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maybe but whats the debate with physics?

thats like arguing with gravity, you can't do it.
Old Oct 8, 2007 | 02:19 PM
  #32  
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Originally Posted by nebster
maybe but whats the debate with physics?

thats like arguing with gravity, you can't do it.
Well, ultimately, physics is just a collection of rules we've noticed to be true. It doesn't mean they are, but we have yet to find an example to disprove them. For example, Netwonian physics and Quantum physics often disagree about how objects move (usually due to the sizes of the objects in question), but both are accepted schools of physics.
Old Oct 8, 2007 | 02:26 PM
  #33  
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right but we're not talking about quantum mechanics or such we're talking about pressure. which is accepted..... there isn't much debate over pressure....
Old Oct 8, 2007 | 03:08 PM
  #34  
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Originally Posted by nebster
right but we're not talking about quantum mechanics or such we're talking about pressure. which is accepted..... there isn't much debate over pressure....
look at u smart guy. ooh, gotta go something shiny on the wall
Old Aug 3, 2008 | 01:28 PM
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