Hi all,
I am installing the FAB airbox in my slow build RV6 with an O-320 engine.
In doing this I am having "fun" with vertical alignment of the FAB inlet with the airscoop inlet.
Initial trials with the airbox cleecod together indicated that I had to raise the inlet fwd end up which necessitated cutting the fibreglass airbox & re-glassing it. When I finally did this and bolted the airbox together with a filter installed I found that the airbox is 0.25" to 0.31" too high.
And yes I had both cowls installed when taking measurements. I suspect the fglass may have moved when setting and the cleecod assembly may have been too flexible. For the eagle eyed I have a "spare" filter on which I am learning how to do the cutouts on.
To alleviate this (& avoid re-cutting the fglass) I am proposing to pack the entire airbox assembly down by up to 0.31" by installing two 0.125" al packers between the airbox and the carb, and by thickening the Mount Plate from 0.063" to 0.125".
This will result in the air filter cutout being a lot shallower (approx 0.31") which means I can just trim the filter top rubber ring and not butcher the filter as Vans requires.
I do not like the vans filter butchering, it is not good design.
So my question is. Has anybody done this (or similar) and if so what has been their experience. Any other feedback also welcome.
Thanks in advance.
Graham Murphy
New Zealand.
I am installing the FAB airbox in my slow build RV6 with an O-320 engine.
In doing this I am having "fun" with vertical alignment of the FAB inlet with the airscoop inlet.
Initial trials with the airbox cleecod together indicated that I had to raise the inlet fwd end up which necessitated cutting the fibreglass airbox & re-glassing it. When I finally did this and bolted the airbox together with a filter installed I found that the airbox is 0.25" to 0.31" too high.
And yes I had both cowls installed when taking measurements. I suspect the fglass may have moved when setting and the cleecod assembly may have been too flexible. For the eagle eyed I have a "spare" filter on which I am learning how to do the cutouts on.
To alleviate this (& avoid re-cutting the fglass) I am proposing to pack the entire airbox assembly down by up to 0.31" by installing two 0.125" al packers between the airbox and the carb, and by thickening the Mount Plate from 0.063" to 0.125".
This will result in the air filter cutout being a lot shallower (approx 0.31") which means I can just trim the filter top rubber ring and not butcher the filter as Vans requires.
I do not like the vans filter butchering, it is not good design.
So my question is. Has anybody done this (or similar) and if so what has been their experience. Any other feedback also welcome.
Thanks in advance.
Graham Murphy
New Zealand.