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sopwith21

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  1. I am road racing a 1974 Datsun 260z. I have the option of either removing the front windshield and rear hatchback to save weight, or leave them in and have a more streamlined, aerodynamic body. I have no idea what to do. Would love to really do my homework here and make a good decision. The car makes approx. 160 hp. It weighs 2213 lbs without driver. The car has been scaled and the weight is evenly distributed via coilovers. Anticipated top speed is 90-120 mph on straightaways at places like Iowa Speedway and Texas Motor Speedway. Overall average speeds on these road racing tracks will be around 65-80 mph. Remember, all side windows have been removed for driver ingress/egress. The only question here is what to do with the front and rear windows. Essentially, I can either save 40-60 lbs (weight being the enemy of speed) and have a car with the aerodynamics of Swiss cheese, or leave both windows in place, keep the extra weight, and streamline the car's aero profile. Which is better? If anyone can lend any support or help, it would be most appreciated. Thank you!
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