So... I need help guys. I am running 28 psi, about to crank it up more, but it falls hard up top. After 7000 rpm, its down to 21 or lower, and keeps dropping. I saw a video recently of an auto 16g 2g eclipse running no ic, and just meth, and he held full boost to redline.

I currently have 5th place for the stock turbo, and I want to keep moving up on the list. My MPH is pretty much stuck at 122 - 123 mph right now at 28 psi. I run the stock ported exhaust manifold, stock turbo with a ported hot side, buschur piping, buschur race fmic, etc... Is it that my motor is just moving more air than the turbo can, or are there tricks that I can do here.

I am about ready to rip that turbo out and weld up the wastegate

--mark

 

Check out the ECU Controlled Boost thread in the ECU Flash forum. With just a few dollars, you can hold boost longer.

 

I don't run a stock ECU, nor would I switch away from an MBC. I am more looking for different WGA's, stronger springs, or other tricks to hold more.

 

the turbo just cant hold boost cause its small, so i guess live with it...

 

Do you still daily drive the car? I have heard of people welding the wastegate shut. That seems a bit extreme though.

 

There are ways, I just mentioned a few. I am not going to live with it, I am going to find the best way to hold more boost, and then do that. I am trying to track down the owner of the 16g car, so I can ask him what he did.

At a certain point, the turbo can only flow so much, and the motor flows more, but I know I have more in it than now.

 

I don't daily the car, but I did put about 2k miles on it this year. It would be very extreme, and I don't want to weld it, but if it comes down it to

 

ok when you hold more boost let us know...

 

You got it bra

 

You can spike that motha to the moon

 

With the stock turbo and AEM, and not willing to switch to even a EBC, you will need a very high pressure wastegate tightened as much as possible.

 

What would an EBC gain over a MBC when it comes to the maximum amount of boost you can run?

 

The boost solenoid on alot of them is able to control boost better than a MBC. It's not that it is better at getting to a max boost, it's better at KEEPING it there.

 

Has anyone used the Forge WGA with the 19 - 24 psi base pressure spring, and then cranked that up?

 

Sure, you have more adjustment, but it won't affect the max pressure or taper.


Boost taper is generally accepted as a wastegate problem. I think something like a Forge wastegate would be a much more sensible decision than an EBC.

It also could simply be that his engine is flowing more air than the turbo can provide, but I don't know enough about the VE of the engine or the flow characteristics of the turbo to make that call.