I've got one. Not fitted at the moment as the location shown on the site is wrong due to the non return valve that's fitted. The best place to put it is the vacuum pipe to the purge filter.... but that's a pain to get to
Cheers for the info. The website said it could also hepl with making the 20v roar a bit more. got the airbox deristriced as per forum guide also drilled the bottom of the air box and with the exhaust it's sounding awesome. But it's like Heroin evey bit ido to make it sound better just makesme want to do more. http://videos.streetfire.net/video/C60243A8-4430-47D8-80D8-D055B874A73B.htm
hows mine sound?
a couple of years ago ecotek had to change their marketing after they couldn't prove their claims. the conclusion of an independant tribunal was that the ecoteck valve does not improve performance (power or torque) and does not affect fuel consumption (mpg). the only claim thay are legally allowed to make is that the ecotek valve improves the driveability of the car. thats a fairly broad thing to say and doesnt mean much.
the actual effect is the revs drop slower when you lift off the accelerator pedal because a small amount of air is bled into the inlet manifold during lift off. the "swirl" effect makes no difference, that has been proven. the air bleed on lift off produces acceleration gains by making revs higher at gearchange during hard acceleraiton, however the negative effect is reduced vacuum assistance to the brake servo during decelleration, the one time you need the assitance. it doesnt make the brakes less effective, but you will need to press the pedal slightly harder than without the ecotek valve fitted. most people dont notice this affect proving it isnt worth worrying about.
overall they arent a bad thing to hav on your car, it wont damage anything, but dont expect any real gains in performance or fuel economy. if it really worked every car would have one as standard. besides the noise is a bit crap, especially when they are new.