Another thread got me sharpening my pencil (so to speak): Post #97 (and # 103) in the chevy II 4 banger thread had some data points http://www.jalopyjournal.com/forum/showthread.php?t=144835&highlight=guyw&page=5 1927 full-fendered T touring / stock height windshield/ top up / 65 mph / auto trans / Chevy II 4-banger / 90 hp at the flywheel... From this I calculated a value for (C<SUB>d</SUB> x A) which would allow me to make simplified aerodynamic calcs FOR THIS CAR CONFIGURATION (although it must be close for T-buckets with stock-type windshields / tops). So, I though someone might be interested in my results: What mph with 20 hp and manual trans? (ie stock) 40 mph What mph with 60 hp and manual trans? (ie flatty 4-bangers) 58 mph What HP to go 70 mph (auto)? 112 at flywheel What HP to go 100 mph (auto)? 328 at flywheel I love Ts, but I need to be realistic.... This could all be refined for Ts with more data points and good estimates of frontal area...
I had a BBC t-bucket with a full height windshield. Got it up around 120 mph on the highway once and noticed the glass was bending a slight amount in the center where there is no frame. I slowed down...scared the shit out of me.