348 Spider

Worst case, body is bending in half I mean literaly, all spiders and t-roofs have bending in the middle of car over time.

Good luck

 

mine seems pretty secure. The boot comes with a connector that is a snap on one side and velcro on the other to secure the center. I've never used mine nor seen the need to at speeds 100+. Your boot might simply be a little stretched out or could it be an aftermarket and just doesn't fit as snug as it should?

 

There should be a snap under the cover that is attached to velcro in the center (part#3 in the picture). if it is not there, you need to order it.

Regards, Jim
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I may have an oddball, as mine has the "female" snap directly under the center of the plastic window, which allows for both covers I have to snap in securely. This may have been added, as apparently my top is the second on the car, due to leaks the first owner noticed. maybe you could install the snap permanently. I have noticed that unless I button it first, it's tough to get snapped, but definitly keeps the top from flapping.

Edit, it's not the typical "studded" snap, but the standard snap button type seen on other convertible tops...

 

My car has the same...The base of the top has a male snap, but the tonneau has no female snap, which would cure the problem. Just have a black female snap added to the tonneau, and you are done !!

 

This works awesome for me even at 170 mph (not that I ever have gone that fast..)

I also own a Porsche convertible and the Germans are geniuses on my model Porsche when you close the rear deck lid you grab the tonneau cover on purpose to hold it down when the lid is closed. I perform the exact thing on the Ferrari and it holds it down great without damaging tonneau cover or lid and you can take her up to speed with confidence.

First big trip I took with the car a similar thing happened to me and I thought I lost most of my snaps but when I pulled over I realized that they just couldn't hold the cover down at highway speeds.

 

my guess is that your boot cover is stretched or not fitting properly. When i put on my boot cover, i REALLy have to tug and pull on it to get some of the clips to snap. If all of your snaps fit too easily, you might need to get a new one.

 

you meant 170 KPH right? ummmm yeah, me neither

 

if I understand you correctly, its the edge that folds over on the rear side of the boot cover, where it meets the engine bay that is flapping correct? See my attached picture. This is my boot. does yours look like this and have the same snaps?
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i think if you did put a snap there, it would stop the flapping, and would be much cheaper than getting a new boot cover. I still think your cover is just stretched. if i snapped all of my snaps except for one of those inside snaps where your flapping is, it would be almost impossible for me to snap it, it would be THAT tight.

Can you even add a snap there tho?

 

Mine also has the snaps and velcro, after it is snapped in place, secure the velcro (this is to allow it to "wrap" around the seat belts) and seems fine at speed. There is a little buffeting, but nothing to be overly concerned about.

 

yep, center snap should fix the problem good luck and let us know the outcome

 

I would take a picture but it is too cold to put the top down now..lol

Experiment in how you fold your top as well you can make the rear window fold and fit 2 or 3 different ways giving you way more room for the tonneau cover and not making it look so bulky.

Where they are suggesting the third snap is the part that you would fit on the inside edge of the rear deck lid. Hope this helps sorry for no photos.