Does anyone have any of the following data? Power/torque curve for Shelby-ized 289 Hipo Cd and frontal area (or CdA value) for '67 GT350 I am putting together a spreadsheet that I can share with the forum that calculates the performance of the car in each gear, and can be used to compare axle ratios, 4/5 speed 'boxes etc. I have scoured the internet and my Shelby reference books to no avail. Many thanks
Skidado, Here is the only information I have regarding your request. 1967 GT350: 289 cu in 306 hp (SAE) @ 6000 rpm 329 lbs-ft (SAE) @ 4200 rpm Frontal area: 19.2 sq.ft. Information and specifications from: Road & Track, Feb. 1967 and Car & Driver, Feb. 1967 There was no reference to the Cd numbers. I don't think those values were included in road tests until later on. If you have the formulas; you can enter the frontal area figure and arrive at the Cd. Hope this helps. Good luck! shlby66
Many thanks for this. I have seen the peak torque and power values before, but what I'd really like to see is the full curve throughout the speed range. Just a plain old 289 HiPo curve would do if a GT350 one isn't available. The frontal area information is very valuable - thanks. I will have to make a guess at Cd, as it is a function of body shape and the effects on aerodynamics. I could measure it by performing 'coast-downs' which is where you run the car up to a set speed (say 60 mph), then knock it into neutral and measure the time it takes to coast down to 50,40 etc down to zero. That would give the total resistive force from aero, pneumatic, and mechanical friction drag. If I can get this spreadsheet to work, it would be valuable for anyone who is thinking about swapping out a toploader for a 5-speed.
