Eric Hsu posted on December 28, 2010 00:40
Locking Ring
The Comp-Gate40 does not use allen screws around the perimeter of the spring hat. It uses a trick "locking ring”. The benefits of the locking ring are no more stripped allen screws, no more stripped hat bases, much easier spring changes, spring changes in less than a minute (if you got your shit together), and an overall reduced height wastegate which allows greater flexibility of wastegate placement.
The notches in the locking rings are for the toothed spanner wrench.
The oversized stainless heat shield under the aluminum base reminds me of the old school Porsche wastegates. Pictured here is the base 7psi spring.
Reduced Package Size with no Sacrifice in Gas Flow
The Comp-Gate40 is only 99mm (3.89”) tall, but still has .582” of valve lift. It also only measures 74mm (2.91") at its largest diameter making the Comp-Gate40 probably the smallest wastegate on the market. I am told that a lot of time was spent on a flowbench to optimize the valve head shape and valve seat profile to ensure gas flow was not sacrificed for a small package wastegate.
The Comp-Gate40's truly small size allows it to be placed in extremely tight engine bays (e.g. Lexus SC430/GS430, BMW E46 M3, BMW E39 M5, Nissan Z33 350Z etc.).
Unique Rotating Cap
The spring hat can be indexed in 12 different positions allowing for greater installation flexibility. The rotation can also be done in less than a minute by only loosening the locking ring. This really does make things go quicker during the setup of a new custom installation.
Nearly infinite hose and fitting positioning means no more burnt hoses and cleaner looking installations.
Once installed on the SSE EVO, there were no changes required to the closed loop boost control PIDs in the Pectel SQ6 ECU. Closed loop boost control was flawless.