Mirrorl Posted June 28, 2018 Share Posted June 28, 2018 Hi All my new 360r when under partial throttle around 2500 rpm approx. A weird and constant squeal develops coming from engine bay, if I press the throttle increase or decrease the rpm it disappears, it is apparent in any gear, sounds a little like a belt squeal but that seems ok. Has anyone else encountered this or has any ideas etc, it’s realy annoying have checked for air leaks etc. Thanks John. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted June 28, 2018 Member Share Posted June 28, 2018 ... it is apparent in any gearAny effect of clutch position?Can you get it to happen in the garage as well as on the road? How about using a stethoscope (DIY or commercial) to try and localise it?Jonathan Link to comment Share on other sites More sharing options...
Mirrorl Posted June 28, 2018 Author Share Posted June 28, 2018 Hi clutch position doesn’t matter, you can get it to make the noise in the garage or on the roadthanks john Link to comment Share on other sites More sharing options...
SM25T Posted June 28, 2018 Share Posted June 28, 2018 On a k-series this can happen if cam cover fixing screws are loose on the top of the engine. Maybe you have something similar on your Ford engine ? Link to comment Share on other sites More sharing options...
Mirrorl Posted June 28, 2018 Author Share Posted June 28, 2018 Hi just managed to find some old posts, it seems like the new 360 induction air box etc can make strange whisking noises still seems strange if anyone has found a cure, any help would be gratefully received, thanks john, Link to comment Share on other sites More sharing options...
Speedtrip Posted June 28, 2018 Share Posted June 28, 2018 Mines the same and was told "they all do that sir!"Off topic, what's your LSD like? Mine whines like a b@5tard between 50 and 70 mph. Again, "they all do that sir." Link to comment Share on other sites More sharing options...
John Vine Posted June 28, 2018 Share Posted June 28, 2018 Does the noise go away if you disconnect the airbox trunking?JV Link to comment Share on other sites More sharing options...
Jim 123 Posted June 28, 2018 Share Posted June 28, 2018 Check clearance between the drive belt and steering column. If they are touching at certain revs the column will have some tell tale line in the protective coating. Link to comment Share on other sites More sharing options...
Mirrorl Posted June 28, 2018 Author Share Posted June 28, 2018 Yes that what cc said, the lsd whines and growls on overrun, have had sevens before and lsd have always made a heck of racket. I can live with that but the induction whistle gets on my nerves a bit. Link to comment Share on other sites More sharing options...
Mirrorl Posted June 28, 2018 Author Share Posted June 28, 2018 Hi will check to see if alternator belt is rubbing at certain revs, I will also disconnect the airbox trunking and see if that makes a difference. Thanks Link to comment Share on other sites More sharing options...
Mirrorl Posted June 28, 2018 Author Share Posted June 28, 2018 Hi all disconnected airbox and trunking deffo induction squeal, slightly better with no airbox, so I suppose will just have to live with it. John Link to comment Share on other sites More sharing options...
7 wonders of the world Posted June 28, 2018 Share Posted June 28, 2018 If you want a pukka plate LSD (Sierra or BMW) that is silent and works speak to Steve at SP Componentshttps://www.tracsport.com/ Link to comment Share on other sites More sharing options...
Alan Reeves Posted June 28, 2018 Share Posted June 28, 2018 I’ve seen those 360 plenums distort as you increase the revs, will that be the cause of the noise change?the earlier 175s have a cast alloy plenum which was changed because?alan Link to comment Share on other sites More sharing options...
ChrisC Posted June 28, 2018 Share Posted June 28, 2018 Mine squeals from the airbox, on light throttle around 2000 rpm. The plenum distortion is much better with the post 2015 plenum, there is almost none. Link to comment Share on other sites More sharing options...
Benton Posted June 29, 2018 Share Posted June 29, 2018 For the record I’ve noticed on my 2018 420r that the plenum does distort quite a bit when you blip the throttle, cant say I’ve noticed any squeaks over all the rest of the mechanical noises, lsd included, but then I wear earplugs 99% of the time Link to comment Share on other sites More sharing options...
ChrisC Posted June 29, 2018 Share Posted June 29, 2018 In comparison to pre 2015 black plastic plenum, the distortion is almost none ;-) Apparently the cast plenum can suffer with heat soaks, seems there is no perfect solution. Link to comment Share on other sites More sharing options...
Speedtrip Posted June 29, 2018 Share Posted June 29, 2018 Are the any after market solutions which could resolve? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted June 29, 2018 Member Share Posted June 29, 2018 Why does this happen... blowing across an orifice or some mode of oscillation of the chamber itself?JonathanPS: Wasn't there a related video? Link to comment Share on other sites More sharing options...
ChrisC Posted June 29, 2018 Share Posted June 29, 2018 Yep these https://caterhamparts.co.uk/other/3665-engine-upgrade-kit-r300-175bhp-to-195bhp.html Link to comment Share on other sites More sharing options...
Speedtrip Posted June 29, 2018 Share Posted June 29, 2018 ......£3700, I'll live with the chirp thank you! Link to comment Share on other sites More sharing options...
JNC Posted June 29, 2018 Share Posted June 29, 2018 Speedtrip when you have got used to your car and feel like there’s something missing this upgrade kit including cams will transform it ask anyone who has done it Link to comment Share on other sites More sharing options...
Tom_Arundel Posted July 1, 2018 Share Posted July 1, 2018 I have in the past (not your engine) had a whistle from an air leak between manifold and head..cured with sealantonly takes a small gap/hole to produce a noticeable whistle Link to comment Share on other sites More sharing options...
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