controlling boost

[Shadow98]

I know this must be a stupid question to those of you who already run a turbo... But how exactly to you control how much psi of boost you run? Does the wastegate have a setting on it where you can choose how much boost to run or do you need a boost controller? The most I will ever run will be 10 psi of boost.

 

[VelocitàPaola]

Wastegates have one setting... this setting is the lowest amount of boost you'll be able to run. Boost controllers can be used to raise boost, but not lower it past that original wastegate setting.

Most internal wastegates are set at about 10psi (although there are 5psi, 7psi, etc. variants). In order to more lower that setting, you can add a sping to the wastegate actuator rod (there is at least one tech article about this), which will induce the actuator to open prematurely. To raise it again, you can simply use a boost controller.

You can also opt to not use an internal gate at all, and get an external wastegate. Most external wastegates are easily taken apart, and interchangeable springs of different settings (5psi, 7psi, 10psi, 12psi, etc.) are available for purchase.

 

[GSGoinFast]

Wastegates have one setting... this setting is the lowest amount of boost you'll be able to run. Boost controllers can be used to raise boost, but not lower it past that original wastegate setting.

Most internal wastegates are set at about 10psi (although there are 5psi, 7psi, etc. variants). In order to more lower that setting, you can lengthen the wastegate actuator rod (there is at least one tech article about this). To raise it again, you can simply use a boost controller.

Actually lengthening the is not a good way to lower boost as it can make the wastegate be open at all times causeing spool to be much slower. The best way to lower internal wastegate boost rating is to do the spring mod to the arm.

 

[XMasta19]

http://www.dsmtuners.com/forums/showthread.php?t=211040

 

[VelocitàPaola]

Actually lengthening the is not a good way to lower boost as it can make the wastegate be open at all times causeing spool to be much slower. The best way to lower internal wastegate boost rating is to do the spring mod to the arm.

Yeah, that's what I was thinking of.

EDITED for posterity.

 

[Shadow98]

Thanks for help guys.

 

[GSGoinFast]

http://www.dsmtuners.com/forums/showthread.php?t=211040

Xavier, did you not see I showed how to do that in my original turbo kit writeup or did you just want to make a seperate one?

 

[Talon ESI-T]

Actually Shadow if you can locate a Deltagate used then you can have an adjustable wastegate. The turbonetics Deltagate II was adjustable up to 5~7psi. They are sometimes hard to find because they arent made anymore. They came with the star Kit.


Terry

 

[XMasta19]

Xavier, did you not see I showed how to do that in my original turbo kit writeup or did you just want to make a seperate one?

nah don't worry Chris, wasn't trying to steal our thunder hehe. When I did mine it was just a little different I guess...there was no cutting and welding involved, that's all

 

[XMasta19]

Xavier, did you not see I showed how to do that in my original turbo kit writeup or did you just want to make a seperate one?

nah don't worry Chris, wasn't trying to steal your thunder hehe. When I did mine it was just a little different I guess...there was no cutting and welding involved, that's all

 

[GSGoinFast]

nah don't worry Chris, wasn't trying to steal your thunder hehe. When I did mine it was just a little different I guess...there was no cutting and welding involved, that's all

Heh not my thunder, Denverspeedshop's thunder It's cool I was just wondering if you knew it was in there.

 

[Shadow98]

Does anyone know where I could buy a missing link from?

 

[VelocitàPaola]

I can make you an FCD if you want - it's an electronic MAP output voltage limiter, rather than a physical bleeder valve (à la ML). PM me if interested...

 

[Shadow98]

Is it called a deltagate or delta wastegate? Cause I think I just might be able to get one.

 

[Talon ESI-T]

Its called a deltagate II made by turbonetics

Terry

 

[Shadow98]

Ok, so heres what I've been thinking... What if I use the 16G with an internal wastegate which open at (i.e.) 10 psi. Now, what if I add an external wastegate (set for 8 psi) to the exhaust manifold or the intercooler piping? Would that work???

 

[XMasta19]

nope

 

[DSMcrazy3]

Ok, so heres what I've been thinking... What if I use the 16G with an internal wastegate which open at (i.e.) 10 psi. Now, what if I add an external wastegate (set for 8 psi) to the exhaust manifold or the intercooler piping? Would that work???

So many things wrong with this question my friend.

First of all, the set-up would have 2 wastegates, which definitely isn't needed. Second, a 10 psi wastegate would cause you to run more than the standard "safe" amount of boost of 8 psi.(now before anyone goes correcting me I will say that i know there are people who have run more than 8 psi on their stock internals and been ok, however there have been some who have run more than 8, who have not been ok.) Finally, the wastegate will never be located on the intercooler pipes, it will either be on the exhaust manifold, or the hot side of the turbo itself.

Before you take the task upon yourself, do a little more research. I'm not saying you can't do this, I don't know how mechanically inclined you are, but from that post of yours, it seems as if you have a little more reading to do. Don't worry though, we've all been there.

 

[VelocitàPaola]

Second, a 10 psi wastegate would cause you to run more than the standard "safe" amount of boost of 8 psi.(now before anyone goes correcting me I will say that i know there are people who have run more than 8 psi on their stock internals and been ok, however there have been some who have run more than 8, who have not been ok.)

Hey buddy... I'm not correcting you, but I just wanted to emphasize that while 8psi is recognized as the safe upper limits of a stage II kit, it's due more to a lack of effective fuel delivery methods, rather than strength of the internals. Our stock internals have been proven safe up to 10psi, the basic 12:1 FMU that most of use loses effectiveness at 9psi.

To Shadow98, listen to everything Josh just told you. You need to do more research before attempting this turbo project... wastegates don't go on IC pipes, and two wastegates is a ridiculous idea. Maybe in some bizarre setup, where the two gates are set the same, to eliminate extreme boost creep would that idea possibly be feasible. Your turbosystem will only hold boost to your lowest wastegate setting: if you have an 8psi AND a 10psi wastegate, you'll only make 8psi.

Just remove the internal wastegate on the 16G, weld the flapper shut, go with an external setup for the adjustability, and be done with it.

 

[Shadow98]

What can I say... I'm a noob when it comes to turbo. As for the mechanical part, i'm good with an N/A set-up. I just want a turbo though. I think I will just remove the internal wastegate and get an external one. Or I might have to go with GSGoinFast's wastegate mod.