Yep-second that Bigworm-I ran one on my 5m and have a big custom one on my turbo (auto) 1FZ (start-up this weekend!) On an auto they serve the same purpose as they do on manual cars-to stop the air that is compressed between the turbo and the closed throttlebody rushing back out the turbo and shaking the crap out of the turbo shaft-and hence reducing turbo life (that is the primary function-not for decreased spool-up time-they help relatively little in that department.) The only time they go off in an auto is when you get off the gas (at the end of the strip...)-they don't go off as the car up shifts at all (at WOT of course-they can hiss and carry on at light throttle though, although they do that regardless of being auto or not.) Remember of course that generally the louder the valve the more restriction they cause-of course reducing their effectiveness. On factory cars they are fitted for turbo longevity (auto or manual)
All turbo cars should have them for turbo reliability.
Mon, 30 June 2003 22:31
