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turbo kit update

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Old 07-17-2004 | 10:53 PM
  #11  
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Originally Posted by parish8
there are at least 2 reasons for this. the whipple i had before was using 70+hp to run. that is power that the engine has to make but doesn't get to the tranny.

the 2nd is the back presure casued by the turbo. the highest load on rods is when the piston gets to the top of the exhaust stroke and tries to fly out the top of the motor but gets yanked right back down on the intake stroke. with a turbo there is exhaust presure and intake presure that are always pushing down on the piston. the rods can handle the compresive loads much easier than the stretching loads.
I'm learning things.
Old 07-18-2004 | 01:32 AM
  #12  
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Originally Posted by parish8
there are at least 2 reasons for this. the whipple i had before was using 70+hp to run. that is power that the engine has to make but doesn't get to the tranny.

the 2nd is the back presure casued by the turbo. the highest load on rods is when the piston gets to the top of the exhaust stroke and tries to fly out the top of the motor but gets yanked right back down on the intake stroke. with a turbo there is exhaust presure and intake presure that are always pushing down on the piston. the rods can handle the compresive loads much easier than the stretching loads.

You know I have been a gearhead ever since I could walk and hold a wrench. I never knew this.

Good luck with the turbo setup.
Old 07-18-2004 | 02:30 AM
  #13  
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Good luck with the new parts, 20PSI may be there.
Old 07-18-2004 | 06:58 AM
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Originally Posted by parish8
with a turbo there is exhaust presure and intake presure that are always pushing down on the piston. the rods can handle the compresive loads much easier than the stretching loads.
OK, I follow ya on the intake pressure (duh, right), but why is there exhaust backpressure? If I'm understanding you correctly, you are saying when the piston is on it's exhaust stroke (lets forget about the intake valve opening for the moment) there is more backpressure on the exhaust flow than with a SC or NA? Does that mean the turbo is restricting flow? Edjumacate me.

Andrew
Old 07-18-2004 | 08:02 AM
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because the exhaust is driving the turbo that is driving the inlet air.
Old 07-18-2004 | 03:20 PM
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Wow, Totally Tubular To The Max!
Old 07-18-2004 | 03:25 PM
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http://auto.howstuffworks.com/question122.htm
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