by chriscarter » Sun Sep 04, 2011 7:50 am
This appears to be a styling exercise, not a practical modification. The Solara uses an upper strut tie-bar to reduce and control cowl flex. Cowl flex is the twisting of the windshield/firewall section of the body under cornering loads. You can really feel this in a Camry that doesn't use an upper strut tie-bar. This flexing is not only in Toyotas or any other make. It is just a combination of design inputs that result in body flex. Removing that much of the roof section would seriously compromise the structural integrity of the unibody construction (no separate frame). There is a distinct possibility that without proper reinforcement, you may have to replace the windshield about every oil change due to cracking!
If you are truly serious about making a Solara Targa, the ONLY safe way to accomplish it will be to add all the additional undercar and side bracing that is built into a Solara convertible. Keep in mind that with this structural bracing, your car will gain about 200 pounds (yes, convertibles of the same model weigh about 200 lbs more). You can consider the roof of your car like an inverted floor...if you cut a large section out of your floor, you'll have to strengthen other areas of the car's box section....no different with the roof.
I'm not trying to rain on your parade, but I really don't think you'd be satisfied with the final outcome...especially after that much labor and effort. Installing a pop-up sunroof is much easier, faster, and doesn't compromise the car's structure. Finally...........keep in mind that if you don't like the result, you CANNOT reverse the procedure! A final thought...if you ever needed insurance-related collision repair, your (or the other guy's) insurance company would smile and say they're not covering the damage......and they would win because the non-factory modifications compromised the structural integrity of the vehicle.
Just my opinion.............