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Do bigger turbos make more power?

Old Jan 11, 2012 | 09:49 PM
  #41  
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What size oil feed line is supplied with KB t6 kit?
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Old Jan 11, 2012 | 10:20 PM
  #42  
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-4.... Just talked to Kyle
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Old Jan 11, 2012 | 11:05 PM
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so whats it mean if you have a rear mount and it pushes oil when it is cold i keep reading conflicting info. some say to run a 1.5 mm restrictor others are saying run a -6 to it and then have a manifold sump setup for the suction pump?
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Old Jan 11, 2012 | 11:29 PM
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Originally Posted by tarinitup
$1450 in stupid tax. But people on forum swore -3 was enough. Should have known better since no one had big turbos at that time.
I better look into that. My GT76 is same chassis as the GT88, and 91's. I've got a #3 I think..;/
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Old Jan 12, 2012 | 12:20 AM
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Originally Posted by foose04
True if you have maxed the smaller setup out. I question the trend were guys want to swap out 1200-1400hp turbo's when their making 700-800 to go bigger. I understand free/swap testing, but to be paying for it just doesn't make sense to me.
I am glad I am not paying for it, if I was I proabably would not do it either.
I hope to really see the gains once I turn it up...
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Old Jan 12, 2012 | 01:54 AM
  #46  
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Originally Posted by tarinitup
Worked great until i killed it with -3 Oil feed line . when time came to buy new the 91mm was only $150 more so I upgraded lol.
Did it eat a bearing? I don't remember anything in any threads about that.
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Old Jan 12, 2012 | 07:25 AM
  #47  
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Originally Posted by xx_ED_xx
so whats it mean if you have a rear mount and it pushes oil when it is cold i keep reading conflicting info. some say to run a 1.5 mm restrictor others are saying run a -6 to it and then have a manifold sump setup for the suction pump?
What pump are you running and is the drain line vented to keep from pulling vac on the line and bearing cavity? I have my line vented, no room for a vented sump. Has worked fine for me for about 8000 miles now. Without a vent on the return line, you are slowing the speed of the pump by pulling vac and drawing more amps which equals more heat in the motor as well.
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Old Jan 12, 2012 | 03:18 PM
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Originally Posted by Blak92
What pump are you running and is the drain line vented to keep from pulling vac on the line and bearing cavity? I have my line vented, no room for a vented sump. Has worked fine for me for about 8000 miles now. Without a vent on the return line, you are slowing the speed of the pump by pulling vac and drawing more amps which equals more heat in the motor as well.
Ok good to know. I was advised to make a sump. so i will make that and put a vent on it. What size? 3/8's pipe nipple?
turbo werx exa pump from what i read it was the best one to use...
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Old Jan 12, 2012 | 07:45 PM
  #49  
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Originally Posted by 00Z71
Unless the turbo itself is causing excessive back pressure
still wouldnt change volume under pressure.

Originally Posted by Swerve7rpm2000
Ever heard of Volumetric Efficiency? So your telling me a 66mm impeller at 15#'s of boost will move the same amount of air as a 91mm large frame turbo at 15#'s of boost?
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.

Last edited by marlboroman71818; Jan 12, 2012 at 07:57 PM.
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Old Jan 12, 2012 | 08:48 PM
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Originally Posted by smokeshow
Did it eat a bearing? I don't remember anything in any threads about that.
It started losing boost and smoking. Took it to local turbo guy and it wasnt fixable because it ate itself up. Said it was oil starvation. Been using -4 ever since w no problems.
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