*sigh* The worst thing to happen in a 'vert

Status
Not open for further replies.

Toastedlightly

Diamond Member
Aug 7, 2004
7,213
6
81
So there I was, minding my own business on a Monday afternoon. I was returning from an alignments shop (having been told that I needed a new eccentric and that my car wouldn't hold the alignment they gave me for 200 bucks), cruising down the freeway in my Miata.

Due to some anger about the alignment bolt, I was driving a bit fast (~75 mph) when suddenly the top of my car flips up and smashes back down behind my head (didn't break free thank gods). Once this happened, I pulled over to the side of the freeway to inspect the damage.

Luckily the plastic rear window in my Miata tore from the center to the four corners of the window. This spared the top from taking a large amount of bending and twisting force, saving the frame of the top.

So what could have caused such a catastrophe? Many would think that I merely didn't properly secure the top (as I thought was the issue at first). However, closer inspection revealed that the latch point on the front of the car had come dangerously loose, allowing the top to grab some air and then tear itself loose of the other joint.

Now I have ordered a new Robbins top (has a glass rear window) to install on my existing frame. Hopefully I can get it done soon so I can enjoy the nice Minnesota weather we are having.

Has anyone ever installed a new convertible top on an existing frame? Any tips or tricks that may come in handy?

Cliffs: Convertible top flying open at 75 mph is not so fun.


EDIT:
Just to top it all off, I put on some 205 Kuhmo Ecsta XS summer tires on it recently too. I haven't been able to have any fun with then due to these alignment/suspension problems!
 
Last edited:

Throckmorton

Lifer
Aug 23, 2007
16,829
3
0
The latches are all adjustable. There's a long hex "nut" that you turn one way to tighten, the other way to loosen
 

JCH13

Diamond Member
Sep 14, 2010
4,981
66
91
I vote poor latch adjustment too. My previous Miata was a little loose and I could grab the top and snug it down on the freeway and get less wind noise.

I can imagine that as soon as the seal between the top and the windshield frame loosened up a bit the drag force from doing 75mph would have it's way with the top and frame.

As for installation tips, this install guide will be your best bet I think. If you need more info, check out Miata.net's garage section on tops.
 

Toastedlightly

Diamond Member
Aug 7, 2004
7,213
6
81
The latches are all adjustable. There's a long hex "nut" that you turn one way to tighten, the other way to loosen

What failed on me wasn't the latch on the top, but the latching point mounted on the A pillar area. The bolts wobbled loose on that edge. I will be putting new bolts and some low grade loctite on the bolts.
 

exdeath

Lifer
Jan 29, 2004
13,679
10
81
No, this is:

manure.jpg
 

exdeath

Lifer
Jan 29, 2004
13,679
10
81
PS the force involved is uplift as a result of low pressure from high velocity air flowing over the top, not drag or anything else.
 
Status
Not open for further replies.