The Drivers side seat was removed earlier, so now I am in the process of stripping that down.
As it is just a repeat of the Passenger side, I am not going to bore you with repeating the above text and photos etc.
However, I have decided that I am going to try to increase headroom slightly by lowering the Drivers seat height. Having thought through some of the suggestions on the Opel Manta Owners Club forum, I have decided that I think that I will go for a 'cut and shut method. This will basically mean cutting a piece out of the seat base/mounting frame.
Assuming my measurements and high school trigonometry are something like correct, I have calculated that by removing 25 mm length from the frame tube I can get the following:
With the seat in its most forward position, I can gain an additional 20 mm of headroom.
With the seat in its rear most position, I can gain an additional 25 mm of headroom.
As I usually have the seat in approx the mid to 2/3 back position, I should achieve around 22-23 mm of additional headroom. So i think that this is the way that I am going to go...
I will be sure to update you with photos etc as I progress.
As you will see, you are then faced with the problem of the angled section of tubular frame not reaching across far enough to join up. I plan to construct a bridge piece using this piece of plate Steel:
Some work done to the Drivers seat mounting frame this morning to try to overcome/correct my stupid error.
I decided to cut the frame right back to down leg of the right hand (as you look from the pedals) pivot point:
My thinking was to try to weld another piece of tubing parallel to, and just about 6 mm below the main seat frame - something like this:
After welding everything back up straight, it all worked OK:
I did think of trying to add some extra weld to that smaller diameter to build it all back up to the same size - but its already very strong and who is going to go looking at that anyway, so didnt bother. Of course there is still a little more weld dressing to do, but that's a job for later.
Then it was time to try it in the car:
Success! - it all clears the bump in the floor/trans tunnel and there is full movement forward and back. But what about the headroom?!, I hear you cry - the whole reason for doing this in the first place of course. Again success, I now have clearance from 1/4 back on the seat rail, right through to the rearmost seating. My preferred seating position is somewhere between those two points, so all good - very pleased.
Now I can make a start on the seat covers for that side...
Today I made a start on the drivers side seat base cover. I needed to remove all the stitches so I could make the necessary templates. Here is the mess I am starting with...
Oh by the way, not sure if I showed you before the little tool I have been using. Its called a seam ripper and really makes light work of popping stitches. The following photos give you an idea of how it works with its tiny (but extremely sharp) blade:
They only cost £2-3 and it is a really helpful little tool
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