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Resolved Manual boost controller install 2GB

Fuzzy

Supporting Member
54
31
Mar 13, 2022
Chandler, Arizona
Yo. Hopefully this isn’t a repost. I installed a manual boost controller on my 99 GSX and I’m not convinced it’s installed correctly. The instructions say to install one end to the wastegate and one end to the turbo or intake manifold… but as seen in the 2GB vacuum diagram below the turbo and wastegate are on a t post and the other end is into the intake. Do I remove the T and connect to the turbo/wastegate or do I use the stock tube configuration and replace the wastegate solenoid with the manual boost controller as it’s currently tubed?
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Solution
No pictures yet… BUT! I did open the boost controller and found the ball in the wrong valve next to the spring instead of under it. I also found the spring pinned under threading so as not to be as loose as the lowest setting should allow.
No test drive yet but seems to be a clear culprit.
Also ordered a new Idle Air Control. Not having one is annoying.

pauleyman

DSM Wiseman
7,998
2,604
Nov 19, 2011
oklahoma city, Oklahoma
Ended up returning to stock. Just couldn’t handle the boost and fuel cut. I’ll try again with better fuel delivery and a better boost controller.
Fuel cut is not based on fuel delivery. If you put in a bigger fuel pump it will not solve fuel cut.
 

Fuzzy

Supporting Member
54
31
Mar 13, 2022
Chandler, Arizona
Fuel cut is not based on fuel delivery. If you put in a bigger fuel pump it will not solve fuel cut.
Ummm… isn’t that the whole point? Am I just using the wrong words? I mean maybe not just a pump but injectors too. I’m pretty sure that solves the inability to deliver enough fuel for the boost.
 

pauleyman

DSM Wiseman
7,998
2,604
Nov 19, 2011
oklahoma city, Oklahoma
Ummm… isn’t that the whole point? Am I just using the wrong words? I mean maybe not just a pump but injectors too. I’m pretty sure that solves the inability to deliver enough fuel for the boost.
Not exactly. Fuel cut is based solely on airflow. It's the tuning solution along with injectors etc that allow you to work around this.
 

CrackedDSM

Proven Member
1,896
560
Dec 17, 2009
Pensacola, Florida
Just FYI the guy who makes the NXS boost controller is/was a DSMer and if you tell him you’re a DSMer/from DSMTuners he’ll give you a (slight) discount.

He builds these by hand and stuff happens. I spent $2500+ on a “reputable big name” company (Miller auto parts) and got completely screwed over with junk and terrible service. I’ve also spent $10 on a 3D printed keychain for my talon and got incredible customer service and a great product.

The whole “get what you pay for” doesn’t exactly exist anymore. Expensive doesn’t always equal automatically better.
 
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