Anyone know what this thing controls?
 

On a 1990 2.0L Twin Turbo:

Turbo timer at a guess

Either that or manual boost control. Manual boost control usually has a knob though...

Just noticed that car has a voltmeter gauge... which means its naturally aspirated... or at least was in its stock form. Unless that guy modded it and put a turbo on i have no idea what it could be.

looks exactly like my razo turbo timer,
cant find a pic on the net to show you,
heres the only pic i have of mine:

Si.


http://img.photobucket.com/albums/v1...Picture021.jpg

burn n' up, my gauge cluster looks exactly the same in my car, and its twin turbo =/

and it comes stock that way with the voltmeter gauge.

just some info =/