Quick run down. Rear mount setup with an VsRacing gt45. it has a 1.15 ar exhaust housing. doesnt spool until 3-3500. Im thinking about making my own gasket and Cutting off half of one of the openings. It is a dual scroll turbo. Anyone think this will help spool it faster? and if im not making myslef clear LMK and i will draw a picture.

 

Essentially making a quick spool valve that never opens... Give it a try and see what happens. Worse that could happen is it doesn't work as you open up the other side too

 

u could try wrapping your exhaust it will keep the heat contained better ,causing better spool (maybe a couple hundred rpm ) allot of guys run that turbo as a front mount

 

Just got a gasket made. no change. i wonder what would happen if i blocked an entire opening off. im only on 6 psi. no real big power. engine is 100% stock other than injectors. i think im gonna try it and see. gotta find another license plate to hack up. which one should i block? inner or outer?

 

Ya, try wrapping your exhaust before the turbo as much as possible.

Also getting a good converter and cam/springs will help your spool time significantly

 

I will buy a different turbo before i buy a convertor/cam/srings.

 

on a serious note would it matter which side of the scroll i block off?

 

Why don't you try both? I've been told if you block off the side farther from the center section, it works better.

 

Okay guys, here is what i got.. i totally blocked off the inside runner and spool went from a pretty consistant 3500 to 2800. Not real sure how back pressure looks yet. but power feels good. When i get back from lunch im gonna flip the gasket and see if that makes a difference.

 

It should spool faster if the exhaust is going into the turbine farther from the center. Farther from the center means a longer moment arm and thus more torque rotating the turbine.

This gasket you made, is it literally gasket material? If so, I don't think it will last very long hanging out in the exhaust path. It would be better to make one from steel, at least 1/8" thick I'd guess.

And as mentioned, wrapping your exhaust should help a bunch. Turbos extract heat and velocity from the exhaust. The cooler the exhaust is when it reaches the turbo the less of both you will have.