Mikal 4 Report post Posted May 19, 2011 Always wondered about the butterfly in my exhaust and did a search to see if I could find out at what RPM it opens, found alot of threads about unplugging the vacuum to the butterfly and replacing it with a golf tee. Makes the car a little louder at idle and low revs Anyone done this? Or any reasons not to do it? More info here... Golf tee mod Quote Share this post Link to post Share on other sites
OP6 27 Report post Posted May 19, 2011 Mine has been like this for at least the last 11000kms with no ill effect. Originally designed so that at low revs and part throttle the exhaust is quiet, then as power and revs rise the flap opens allowing better breathing. Quote Share this post Link to post Share on other sites
Mikal 4 Report post Posted May 20, 2011 Unplugged it and went for drive to mcds. Sounds much nicer at low revs than it used to. Definitely worth my 10secs of time. Didn't notice any difference with throttle response but was only cruising so might need a proper drive to feel anything. Quote Share this post Link to post Share on other sites
Young Thrash Driver 1020 Report post Posted June 4, 2011 Huh, I never even noticed that valve in there. One bonus with this mod- the car has one less faint little creak as the valve opens after the car's turned off Quote Share this post Link to post Share on other sites
Filter_nz 0 Report post Posted June 7, 2011 If your car is auto don't bother. Sounds 'more awesome' at low RPM, in fact, in general a more aggressive note but I found it really droned inside the cabin and horrible for long trips.... kinda makes it sound like the motor is labouring and every minor rpm movement you can HEAR i.e when the road inclines the drone gets louder. After a week or 2 I put it back to normal. If you've got a manual I would assume it'd be much less irritating and worth it for the cool factor. Quote Share this post Link to post Share on other sites
joshnz 2 Report post Posted June 7, 2011 Tried it in my auto, noticed a bit of difference, definitely not a drone, something else must be up with your exhaust, slightly louder at low RPM but BARELY noticeable here. I imagine adding chrome tips would have a louder effect Quote Share this post Link to post Share on other sites
5amchris 45 Report post Posted June 7, 2011 Dont even think about stealing mine josh Quote Share this post Link to post Share on other sites
B-rad 0 Report post Posted July 3, 2011 ill lend you one chrome tip josh.. Quote Share this post Link to post Share on other sites
