Manual Boost Controller recommendations...
Thread Starter
Burning Brakes
Joined: Sep 2013
Posts: 1,160
Likes: 171
Manual Boost Controller recommendations...
Replaced an old leaking TurboXS manual boost controller with a brand spanking new Grimmspeed and its leaking, zero miles. I need a good one that doesnt leak, 30+ psi. Going on my wifes little 4 cylinder and there isnt an active Caliber SRT4 forum anymore. Thought Id ask the pros!
Melting Slicks
Joined: Jul 2014
Posts: 2,356
Likes: 359
From: Virginia
Replaced an old leaking TurboXS manual boost controller with a brand spanking new Grimmspeed and its leaking, zero miles. I need a good one that doesnt leak, 30+ psi. Going on my wifes little 4 cylinder and there isnt an active Caliber SRT4 forum anymore. Thought Id ask the pros!
Pro
Joined: May 2013
Posts: 740
Likes: 82
From: MN
Where was it leaking, and how did you find the leak? I am using a GS on my C5, and it seems fine, but I'm hardly pushing it at 10psi.
If I recall correctly, the Turbosmart is an adjustable bleed orifice, with a weak, non-adjustable (like ~3psi) spring and check ball. Most others that I know of (GS, Hallman, etc.) are just an adjustable spring and check ball with a fixed orifice. I think the Turbosmart design is supposed to reduce boost spiking? Not really sure whether either style is superior.
If I recall correctly, the Turbosmart is an adjustable bleed orifice, with a weak, non-adjustable (like ~3psi) spring and check ball. Most others that I know of (GS, Hallman, etc.) are just an adjustable spring and check ball with a fixed orifice. I think the Turbosmart design is supposed to reduce boost spiking? Not really sure whether either style is superior.
Thread Starter
Burning Brakes
Joined: Sep 2013
Posts: 1,160
Likes: 171
Ok update. So I jumped the gun and looked closer where it was leaking. I thought it was from the **** but there is a tiny tiny hole that is supposed to leak a little thats just under the ****. Called GS and they said its a safety feature. Guess Ill try it. Trying to seal up boost leaks and find one thats supposed to be there.
On a sidenote, the TurboXS was really messed up. Leaked real bad from the **** area. Id also keep turning up the boost on that one and it wouldnt go passed 26psi, not really sure why. Id keep turning it one wot pull at a time, no difference in boost.
On a sidenote, the TurboXS was really messed up. Leaked real bad from the **** area. Id also keep turning up the boost on that one and it wouldnt go passed 26psi, not really sure why. Id keep turning it one wot pull at a time, no difference in boost.
Last edited by ascastil; Apr 2, 2019 at 12:55 PM.
Pro
Joined: May 2013
Posts: 740
Likes: 82
From: MN
Yep, sounds like you found the bleed orifice on the GS, you want that to be there so you don't trap pressure between the boost controller and the wastegate diaphragm when the check ball closes. The size of that orifice also plays a role in the boost spike/dip behavior of the controller. The amount of air it will leak is negligible compared to what your engine is pumping 
Good luck!
Good luck!
Thread Starter
Burning Brakes
Joined: Sep 2013
Posts: 1,160
Likes: 171
Tial wastegate, 13lb spring for now. Just going to turn it up to 26psi. It's a new wastegate and I was told rule of thumb to double the spring pressure on the wastegate to what boost you want to run. I think I phrased that right lol. Anyways, 13lb spring x2 equals 26psi lol.
Last edited by ascastil; Apr 2, 2019 at 02:00 PM.
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Melting Slicks
Joined: Jul 2014
Posts: 2,356
Likes: 359
From: Virginia
Tial wastegate, 13lb spring for now. Just going to turn it up to 26psi. It's a new wastegate and I was told rule of thumb to double the spring pressure on the wastegate to what boost you want to run. I think I phrased that right lol. Anyways, 13lb spring x2 equals 26psi lol.
Thread Starter
Burning Brakes
Joined: Sep 2013
Posts: 1,160
Likes: 171
Idk, I'd say the minimum would be 20. It's weird because the turbo seems like it's on or off, no in between. We were also told when we went all out on the build it's either wot or not due to bending rods. So it's either cruising or mashing the pedal. Once the pedal is pushed to the floor, its max boost what I set it on. Hope that makes sense.
Melting Slicks
Joined: Jul 2014
Posts: 2,356
Likes: 359
From: Virginia
Idk, I'd say the minimum would be 20. It's weird because the turbo seems like it's on or off, no in between. We were also told when we went all out on the build it's either wot or not due to bending rods. So it's either cruising or mashing the pedal. Once the pedal is pushed to the floor, its max boost what I set it on. Hope that makes sense.