good read, ill be trying this

 

I've got a Big eBay special turbo on my 1.6, and I find that using "Point C" after the throttle body gives me the best response.
I have not seen any drawbacks with a year of use, including multiple track days.

The turbo doesn't even spool at lower engine speeds, so no issues with running the system too hard/hot with the wastegate closed at partial throttle openings.
I do agree that this would be an issue with a smaller/normal sized turbo (and that "Point B" would be the choice for an appropriately sized setup.)

When I have the revs up (past the boost threshold of ~4000rpm) at part throttle I can hear the turbo is spooled up nicely.
This means immediate boost when I go to WOT.

As they say YMMV, but Point C in my case is measurably superior to Points A & B.

 

I have a 1.8L na, sr20det turbo (garret 2554ish), cast manifold, ported wastegate, Garret stock actuator or eBay adjustable wastegate and it’ll always spike 2-3psi above any target greater than 8-10psi. At 6psi it doesn’t spike much. I’ve tried no mbc with ports a,b, and c and it Still spikes. I’ve tried with mbc and it spikes. The little turbo gets so much steam above 8psi and just likes to spike. I have also tried no preload and lots of preload on the actuator along with about every type and diameter of vacuum line. Boost leaks were fixed via smoke test.

is the answer ebc?

 

EBC can and probably will help, but that's a symptom of overspinning your turbo. Those sr20 turbos fall on their face after low 200' whp, I used to have one. It was a fun *** street setup though.