1999 MK4 1.8 GTI - Engine noise/booming around 80mph!

[gtidan]

Hi all, this is my first post on here since buying a second hand VW Golf GTI 1.8 a few weeks ago. I thought I'd start here by seeing if anyone had any ideas as to my niggles!!

First of all, The car drives very well up to a point around 75mph-85mph where the engine suddenly gets very noise/boomy - pretty sure it's coming from the engine and not the exhaust, but above 85mph its goes quiet again as I'm thinking it should be around 80mph...(not that I regularly go above this!!!) 

Can anyone suggest what might be causing this? Like I say, it's pretty quiet up to that point and again after, just seems to boom/resonate around 80mph!

Cheers

[richy]

Mine does the same (gets louder 80-85).  Don't think its a problem - probably just hit the resonant frequency of the exhaust manifold or something! 

I find it makes me drive faster, as it gets louder if I go under 85!  ( only when driving on autobahns though  )

[Hoonercat]

Mine does the same, though the noise gets louder the faster I go. Quite like the sound of the engine though

[fackie]

Ahh... nothing like the blissfull sound of 114 mph on a PD150... 

[kniterider]

my 20v mk4 does this too, think its just the noise of the induction side pf things, they have for some reason used a heat resistant plastic for the intake manifold on this model. mines probably noiser than the others as i run  mine with out the gay plastic engine sheild on also

 

[gtidan]

As you can get induction kits/filters that make the engine noisier, can you get similar filters/kits to reduce the noise / dampen the sound which would help solve my problem?

Cheers

[Sugar79]

my engine sounds like it needs another gear at that speed lol also when i drive 80mph and faster lol my suspension and the whole movement of the car feels very unstable!! anyone still got the orginal VW suspension and have the same prob??

*** sorry i didnt mean to change the subject*****

[topher]

Nope, dodging traffic at silly speeds on the motorway causes me no problems.. think you may need your bushes looking at.

[Sugar79]

i think the whole underneath needs looking at lol, it all sounds cranky... bl00dy speed bumps

[topher]

*resists all temptation to make gags about poking around your undercarriage and inspecting your bush*