Not a huge deal either way. 4D is stiffer, but the cage should make them equal. Weight isn't an issue, although Cg may be further back in the 4D - haven't scaled one here yet. If there is any advantage, it goes to the 4D with a higher roofline, accelerating air faster and giving more rear downforce as it hits the trunk. 93-95!
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James Clay http://www.bimmerworld.com
Engineered BMW Performance
World Challenge/SCCA/BMWCCA Racecar Rental
Genuine OEM and Used BMW Parts
(540) 639-9648
-----------------------------------------------------------
Not a huge deal either way. 4D is stiffer, but the cage should make them equal. Weight isn't an issue, although Cg may be further back in the 4D - haven't scaled one here yet. If there is any advantage, it goes to the 4D with a higher roofline, accelerating air faster and giving more rear downforce as it hits the trunk. 93-95!
------------------
-----------------------------------------------------------
James Clay http://www.bimmerworld.com
Engineered BMW Performance
World Challenge/SCCA/BMWCCA Racecar Rental
Genuine OEM and Used BMW Parts
(540) 639-9648
-----------------------------------------------------------
