Coley Posted February 15, 2017 Posted February 15, 2017 Hi all. First of all I'm new here and would really like my question answered if that's not a problem. I have owned a impreza GB270 now since November and I love it up to yet. But something has been bugging me since owning it. When driving I don't get that turbo spool noise sort of like a jet noise if you understand me and wanted to know why this is? I've owned a focus St and megane sport before the Scooby and they both got that noise. To me it doesn't seem right with the Scooby or is this normal? My brother had a bug-eye sti imported from Japan it was was completely standard but it still had that whistle noise and felt much faster to be honest. My gb270 has got a nur spec r exhaust system and I've removed the snorkus but still the same. Everything else is standard on the car, any advice is appreciated.
Jay762 Posted February 15, 2017 Posted February 15, 2017 Wotcha and welcome - did your brothers bug have a different induction kit fitted? An aftermarket kit should give you the noise you are looking for. http://scoobyworld.co.uk/catalog/index.php?cPath=47_66_611
Coley Posted February 15, 2017 Author Posted February 15, 2017 Thanks for the reply. No it didn't, it was completely standard. It's confusing me I keep thinking I have got a boost problem due to this but I could be wrong.
stants Posted February 15, 2017 Posted February 15, 2017 Does yours have the oem cat in or is the nur space all the way through ? Sent from my SM-G930F using Tapatalk
Coley Posted February 15, 2017 Author Posted February 15, 2017 The cat is standard and from there it's the nur spec exhaust. The centre box is removed so it's just a stainless pipe.
quit Posted February 15, 2017 Posted February 15, 2017 Induction kits give a nice whistle from the turbo, i got a hks one on my bug
Coley Posted February 15, 2017 Author Posted February 15, 2017 Does it? I did try a friend's k&n cone filter on mine I put it straight onto the pipe that goes to the air box. Went for a drive and still didn't make much of a difference to be honest. Obviously got the air sucking noise then when changing gears got a bit of a terrible sounding dump valve noise, well more like a wet !Removed! noise.
Coley Posted February 15, 2017 Author Posted February 15, 2017 Lol that's the thing it don't have a dump valve, the noise was just coming from the cone filter of my mates I put on.
quit Posted February 15, 2017 Posted February 15, 2017 yeah the standard one sounds like a horse , though you should still hear the turbo! its very prominent on classics tho
Coley Posted February 15, 2017 Author Posted February 15, 2017 I honestly hear nothing that's why I joined here for advice. I wasn't sure if it's a normal thing on these models and if it was silenced some how. I have also noticed on it that the actuator has no threads left on the rod so it's been made as tight as possible by the previous owner or can they not be adjusted on these cars and it's basically made to suit and that's it if you know what I mean?
quit Posted February 16, 2017 Posted February 16, 2017 normally they are pretty loud in everything they do, not exactly subtle! Can you get a pic of the actuator, im not a 2.5 boy but a few on here are
Jay762 Posted February 16, 2017 Posted February 16, 2017 Are you feeling a surge under acceleration, do you have a boost gauge, is it registering anything? it should be noticeable - if not it might be that your turbo is just free-wheeling with the actuator holding the bypass open?
Coley Posted February 16, 2017 Author Posted February 16, 2017 Yes I will post a picture up of it. I did fit a boost gauge due to me thinking something wasn't right. On full boost it gets about 13-14psi is this right? I have noticed when in 3rd gear I put foot to the floor and the gauge shoots up to around 15-16psi then instantly drops back down to around 13-14psi.
stants Posted February 16, 2017 Posted February 16, 2017 Sounds about right, 14 psi is 0.9 bar, not entirely sure what stock is on your model but 14/15 Psi would be 1bar Sent from my SM-G930F using Tapatalk
Seminole81 Posted February 17, 2017 Posted February 17, 2017 11 hours ago, stants said: Sounds about right, 14 psi is 0.9 bar, not entirely sure what stock is on your model but 14/15 Psi would be 1bar Sent from my SM-G930F using Tapatalk Pretty sure stock is 14.5psi
Jay762 Posted February 17, 2017 Posted February 17, 2017 yup around 1 bar is standard - obviously dependant on engine / turbo condition that may vary
Coley Posted February 17, 2017 Author Posted February 17, 2017 Well how could I check the turbo is good? And maybe a way of finding a leak?
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