Ryandigi Posted January 28, 2009 Share Posted January 28, 2009 I have a catless downpipe and sti uppipe and just assumed that the very high-pitched noise was from the turbo whine being more audible. Well today I had no music on and was going 40mph in 4rth gear and decided to give 4rth a rest and shifted into 5th. Once in fifth going the same speed I hear the turbo-like high pitched whine start. I would lift the gas and gas it and it would remain there but would change pitch slightly. 26k and never changed the transmission or diff fluid (waiting until it gets warmer). Any ideas? Link to comment Share on other sites More sharing options...
Ryandigi Posted January 29, 2009 Author Share Posted January 29, 2009 Akkk, figure it is just turbo whine that is more audible at higher loads (going free way speeds) Link to comment Share on other sites More sharing options...
Innovative Tuning Posted February 3, 2009 Share Posted February 3, 2009 Right. It's more likely to spool with more load on it, and when it spools more it makes more noise. Also at lower RPMs the engine/exhaust noise is lower so you're more likely to hear the turbo over them. Link to comment Share on other sites More sharing options...
Soda Popinski Posted February 3, 2009 Share Posted February 3, 2009 Does cold effect this as well? On really cold days, my turbo makes a really high pitched whiney nose. Never get that on anything over 20 degrees F though. Link to comment Share on other sites More sharing options...
Innovative Tuning Posted February 3, 2009 Share Posted February 3, 2009 Colder temps and and being at lower altitudes will promote spooling of the turbo with less effort than at higher ambient/intake temps and altitudes due to the change in density. A high pitched whiney noise could be totally normal or extremely bad news. Without hearing it myself I couldn't offer any feedback on that. Link to comment Share on other sites More sharing options...
Ryandigi Posted February 5, 2009 Author Share Posted February 5, 2009 turbos that are going can make really high whiney noises? Link to comment Share on other sites More sharing options...
iNVAR Posted February 5, 2009 Share Posted February 5, 2009 turn your music back on. problem solved Link to comment Share on other sites More sharing options...
Ryandigi Posted February 9, 2009 Author Share Posted February 9, 2009 turn your music back on. problem solved First I need to make a new cd...been running the same mp3s for 2 years now! .....a little outdated.... Link to comment Share on other sites More sharing options...
Woodstock Posted February 14, 2009 Share Posted February 14, 2009 I notice that also the whine is alittle louder on 5th gear. I have a STS and I hear a grind shifting from 4th to 5th gear. Link to comment Share on other sites More sharing options...
Ryandigi Posted February 14, 2009 Author Share Posted February 14, 2009 so easy to get paranoid with our babys'....probably more so than I will be with my kids Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.