Today I started in earnest the process of mounting the fiberglass westafalia top onto the fun hog.
My reasoning for using a VW top was this. I want to be able to stand straight up in at least part of the van. I'm 6'3" with most fixed hard tops I would still be slumped over a bit. So for pop tops on my budget it was either custom of used VW. I wanted to be able to buy canvas off the shelf rather then needing a custom tent made so the VW top won out. I pulled this particular top off of a 74 Westfalia I bought for $150 for parts. Let's just say I made money on the deal.
The fiberglass top is flexible and totally flat on the bottom. My van has a compound curve that is the roof. After setting the top on the van last fall I knew it was to going to take some trimming to make this work. I needed a way to hold the top above the van evenly.I hate to admit is but I racked my brain for MANY hours how to accurately transfer the curve of the roof to the top so it would be at least close enough to make some final fitment trims. I had though about rope systems to hold it level from my shop ceiling, two by fours strapped across the roof of the van ect ect ect. Now looking back I feel rather stupid for not coming up with this idea sooner.
LOAD BARS!!!!!
IMG_20141026_165645 by
boardrider247, on Flickr
Yep. Simple as can be. They are already flat and the same height above the van. Once I had this epiphany it was a simple matter to transfer the curve of the roof to the top for trimming. A little level and stick rule work got the top centered on the van side to side.
Here you can see that the westy top lines up to land just outside of the last rib on the van roof. Should make for a very good seal.
IMG_20141026_170133 by
boardrider247, on Flickr
To give you an idea how much trimming is needed. This is the furthest from the roof that the top sat on the load bars.
IMG_20141026_170151 by
boardrider247, on Flickr
And this is the closest
[img
]https://farm4.staticflickr.com/3934/15450410937_739bfb5b7b_h.jpg[/img]IMG_20141026_170159 by
boardrider247, on Flickr
Back corner
IMG_20141026_170210 by
boardrider247, on Flickr
My uber scientific marking device
IMG_20141026_171358 by
boardrider247, on Flickr
And we have a curved line on the top
IMG_20141026_171601 by
boardrider247, on Flickr
IMG_20141026_171607 by
boardrider247, on Flickr
That's it for today. I worked last night til 3am and am ready to crash.
I am looking for some input on how to finish this portion of the project off though. Most people who use VW tops on non VW vans seem to make a fiberglass nosecone to fill the front portion. This is certainly an option and would provide for the best aerodynamics but I am also thinking of making a roof bar/fairing similar to the Nissan Xterra's. I would build a flat plate that seals the westy top and had bars projecting forward with a lexan fairing. Maybe easier then fiberglass but may hurt MPG's?