Results:
1. Solid and correct location of the seat belt receptacles. This picture shows the receptacle and the passenger seat in its lowest mounting position.
2. Somewhere between 1 1/2” and 1 ¾ “ more head room from the original base model seats (not the sport seats). With the old seats my head lightly hit the roof liner. This picture shows the top of my fat and balding head on the driver side with the new seat set up.
If I remove the butt cushion in the SPG, I get about another 1/2” of head room. Not a good thing for long drives but maybe okay for DEs when I want the extra room for a helmet.
This is a picture of the bottom side of the passenger seat and shows the bottom of the seat below the top of the car mounting rails (shows the same concept as in the BK's CAD drawing below).
I've seen plenty of posts about how much racing shells improve the driving experience of the car. After a few hours of back road driving here in VT I strongly agree.
But the cons first:
1.Reduced backward visibility when you want to change lanes and when you are backing up. This is not a big problem but it requires more deliberate action.
2.Egress and Ingress challenge – like any racing shell.
3.Back seats are very difficult to access.
The benefits for me are:
1.Better visibility both up to the sides and up to the front (I can be first in line at a stop light and see the stop light without any contortionist moves.).
2.Better lateral support.
3.Better control of clutch, brakes, and gas because my body doesn't move backwards so much when I use the pedals.
4.Quite a bit of weight savings although I have not figured this out exactly yet. The original seats and sliders weighed 89 lbf. The new seats and sliders are probably less than half that.
The end result is a much more stable Go-Kart like feel to the car. I remember back to using the original standard seats and feel a bit motion sick just thinking about their lack of support. My conclusion is that Porsche NEVER should have offered a 911 with the baseline seats. Those seats were not quite as unstable as the ones in my parent's 1977 Ford Granada with the faux convertible roof done up in white naugahyde (gives the vehicle the status associated with the annihilation of an albino rhinoceros but without the guilt). But the Porsche and Ford seats are in the same ballpark!
Parts & Costs:
$1798 2 Recaro SPG XL seats
$358 2 pairs of BK R-9773 seat brackets
$442 fabricate and weld 2 anchor plates
$4 20 button head cap screws and washers
$3 2 seat belt receptacle bolts from PEP, 1 3/16" length
$1 2 grade 8 nuts from PEP
$1 2 aluminum spacers from PEP
$2607 total
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These are the Brey Krause R-9773 bracket pictures and information. You won't find them on the BK site because they don't have plans to produce more of them. But BK has done all the development work so you may be able to convince them to make more.
