3 replies to this topic

[Tom Sager]

I have experienced wind buffeting at times in my 2000 Spec Miata.  You know the kind that happens when one of your kids in the back seat of the family car opens a rear window while all other windows are closed and your eardrums complain.  It happens at higher speeds (above 90MPH) and only at certain places on a race track which tells me that the wind direction may have something to do with it.  It doesn't have to be an overly windy day for this to happen.  Might happen on one straightaway on a track and not the other.  

 

The hard top is fastened properly as far as I can tell and not tweaked in any way.  I've played with the height of the top at the rear base and it doesn't seem to matter.  It's strange and I have never experienced this in any other Spec Miata I have driven.  I gotta believe that this slows the car down aerodynamically when it happens.  Any ideas?  

[Todd Lamb]

you gotta roll down the rear windows or open the sunroof

[davew]

Kind of off topic, but this reminded me of a car I saw in used car lot last fall.

 

Red NB Miata with a hardtop. Sounds inviting, except the hardtop had a pop-up sun roof cut into it !!!!!

 

So I have seen a convertable with a sunroof

 

Dave

[Sphinx]

Check the tire balance of your rear wheels.  I just had this happen at Road Atlanta about a month ago.  I had the tires rebalanced and problem was solved.

 

I actually didn't feel too much vibration (ala the infamous 68mph miata shimmy), but was hearing the buffeting.  RussMcB was driving behind me and told me after the session that it looked like my rear bumper was flopping around, not secured.  The bumper was solid.  So, I checked the tires and problem solved.  No more floppy bumper.