Just to be clear
01-06-11, 12:51 AM
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Just to be clear
This is probably a dumb question but What is the point in porting the turbo waste gate if later you go out and get a turbo boost controler that will put you back to over stock boost levels. I know i know eliminate boost creep, but isnt the boost controler just doing the same thing in the end? Adding more boost. Wont they allow boost creep anyway? Isnt more boost more power to begin with? 
Last edited by Linguo415; 01-06-11 at 12:56 AM.
01-06-11, 01:03 AM
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The boost controller cannot control boost creep and it cannot lower boost. You need the wastegate ported to maintain the boost level you want. Running higher boost doesn't mean you have to creep. If the wastegate is small it gets overwhelmed with air and cannot let enough pass by, that air goes to the turbine and spins it more making more boost or "creeping". When you port it out more air can bypass the turbine and you can get better control of your boost. Hope that helps.
01-06-11, 07:10 AM
#5
More exhaust through wastegate = less exhaust pushing turbine wheel = slower wheel rpm = less boost.
You need full exhaust flow for spool, once the turbo is at RPM (boost) much of the exhaust needs to go through the wastegate to maintain turbo RPM (boost), rather than increase it (boost creep).
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01-06-11, 03:09 PM
#8
Huge concept error.
If the stock turbo is making 40 psi, it's not making more power. It's pumping heat at anything past 12psi if I remember correctly (someone fix me if I'm wrong on that). More boost means you need more fuel. That's why boost creep is bad. You can safely raise boost levels up some, and gain some power while you're at it. However, boost creep is a different animal. With the stock exhaust, the stock wastegate is sufficient enough to pass exhaust around the turbo to keep it at the pressure the wastegate wants it to be at. However, with a free flowing exhaust, it can't bypass enough and the exhaust follows the easiest path. Not through the tiny wastegate, but through the turbine, spinning the turbo up more, causing more boost. If you have stock injectors, it'll lean out your engine and cause some serious damage.
So with a free flowing exhaust and a well ported wastegate, you're still getting only stock boost levels. The free flowing exhaust helps, but it's not all you could be getting out of it. With a boost controller, it'll raise the pressure up to where you want it, and you've done so safely. Keep in mind though, that the boost controller cannot lower your boost pressure past what the spring allows. It can only raise it up. And do so carefully, please. Make sure you get a wideband to watch your AFR's. All it takes is one good detonation and you've toasted your pride and joy.
If the stock turbo is making 40 psi, it's not making more power. It's pumping heat at anything past 12psi if I remember correctly (someone fix me if I'm wrong on that). More boost means you need more fuel. That's why boost creep is bad. You can safely raise boost levels up some, and gain some power while you're at it. However, boost creep is a different animal. With the stock exhaust, the stock wastegate is sufficient enough to pass exhaust around the turbo to keep it at the pressure the wastegate wants it to be at. However, with a free flowing exhaust, it can't bypass enough and the exhaust follows the easiest path. Not through the tiny wastegate, but through the turbine, spinning the turbo up more, causing more boost. If you have stock injectors, it'll lean out your engine and cause some serious damage.
So with a free flowing exhaust and a well ported wastegate, you're still getting only stock boost levels. The free flowing exhaust helps, but it's not all you could be getting out of it. With a boost controller, it'll raise the pressure up to where you want it, and you've done so safely. Keep in mind though, that the boost controller cannot lower your boost pressure past what the spring allows. It can only raise it up. And do so carefully, please. Make sure you get a wideband to watch your AFR's. All it takes is one good detonation and you've toasted your pride and joy.
01-06-11, 03:45 PM
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Huge concept error.
If the stock turbo is making 40 psi, it's not making more power. It's pumping heat at anything past 12psi if I remember correctly (someone fix me if I'm wrong on that). More boost means you need more fuel. That's why boost creep is bad. You can safely raise boost levels up some, and gain some power while you're at it. However, boost creep is a different animal. With the stock exhaust, the stock wastegate is sufficient enough to pass exhaust around the turbo to keep it at the pressure the wastegate wants it to be at. However, with a free flowing exhaust, it can't bypass enough and the exhaust follows the easiest path. Not through the tiny wastegate, but through the turbine, spinning the turbo up more, causing more boost. If you have stock injectors, it'll lean out your engine and cause some serious damage.
So with a free flowing exhaust and a well ported wastegate, you're still getting only stock boost levels. The free flowing exhaust helps, but it's not all you could be getting out of it. With a boost controller, it'll raise the pressure up to where you want it, and you've done so safely. Keep in mind though, that the boost controller cannot lower your boost pressure past what the spring allows. It can only raise it up. And do so carefully, please. Make sure you get a wideband to watch your AFR's. All it takes is one good detonation and you've toasted your pride and joy.
If the stock turbo is making 40 psi, it's not making more power. It's pumping heat at anything past 12psi if I remember correctly (someone fix me if I'm wrong on that). More boost means you need more fuel. That's why boost creep is bad. You can safely raise boost levels up some, and gain some power while you're at it. However, boost creep is a different animal. With the stock exhaust, the stock wastegate is sufficient enough to pass exhaust around the turbo to keep it at the pressure the wastegate wants it to be at. However, with a free flowing exhaust, it can't bypass enough and the exhaust follows the easiest path. Not through the tiny wastegate, but through the turbine, spinning the turbo up more, causing more boost. If you have stock injectors, it'll lean out your engine and cause some serious damage.
So with a free flowing exhaust and a well ported wastegate, you're still getting only stock boost levels. The free flowing exhaust helps, but it's not all you could be getting out of it. With a boost controller, it'll raise the pressure up to where you want it, and you've done so safely. Keep in mind though, that the boost controller cannot lower your boost pressure past what the spring allows. It can only raise it up. And do so carefully, please. Make sure you get a wideband to watch your AFR's. All it takes is one good detonation and you've toasted your pride and joy.
01-06-11, 03:48 PM
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Now that this is all about boost. Does anyone out there make upgraded actuators for the stock turbo wastegate? Whats the most boost anyone has squeezed out of the stock turbo anyway? i was thinking about upgrading to a bnr stage 2 or 3 but I kinda like the stock one.
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