If i am pulling an indicated 8000 rpm in 5th how fast am I going
At redline of 7800 rpm, max speed is 150.36 mph, assuming 205/70 14 tires from the original. 8000 rpm = 154,2 mph. All the info to calculate that is in the Owner's Manual, by the way. Ratio the 4th gear ratio to the 5th gear ratio and multiply by the max speed in 4th, 112.2. Pretty basic math. Taz Terry Phillips
It was this thread that started me thinking http://www.ferrarichat.com/forum/showthread.php?t=301183 I have a sequence leading up to this, car was still pulling when I had to slow down, I had instructed my passenger to take a photo at 6000 rpm, 6500, 7500, and so on. I noticed a truck a loooong way off so I asked my passenger to sit back as I was bout to slow down. When she lifted her head, she gasped and so the photo is a little fuzzy. but it points to 8000rpm. Image Unavailable, Please Login
Last time I got to 135 mph in my Dino (1976), the belly pan blew off. Never did find the bloody thing. No telling how far it went. I doubt you went 154 mph in a Dino, but who knows? C&D tested a 365 GTB/4 relatively recently and could only get 162 mph (true) out of it. Mine was faster and so was the Kirk White car that won the first Cannonball. Of course, that time was handily beaten by a Dino 246 GT, just to add confusion. Taz Terry Phillips
It's all over the place I agree. Loosing a piece of you car at any speed is hairy. At that speed it must have given you quite jolt! Or did you think you ran over something? No point looking in the rear view mirror. Like the guy driving the Daytona in the first cannonball said "what's happening behind me does not matter"
Right, but sometimes maybe ? http://www.youtube.com/watch?v=u6YkqTzCGew&feature=related Old video, but im glad my wife is not Italian...
never really payed much attention to road test speed figures, a couple of early ones showed 248! Did they really take the cars to 248? You know it will at least do an indicated 135, bet you it was still accelerating. My first long trip in this car, was quite an adventure, a 24 hour trip that took 4 days. subsequent to that the car was fitted with pointless ignition and the air intake hoses were sealed with and duct taped in place. The car was significantly faster after that. Can the dials be trusted? well they are in sync. 1000 rpm in 5th is 20mph and so on. So if they are optimistic then they are equally so. Mile markers easily proved accuracy. maybe it was downhill with a following wind. but that's not what I remember, I remember a really great wine in really great company.
I trust Road and Track In the original test of the 246GT in May 1972 they recorded 141 mph at 7800 rpm.
L's have different final ratios than E or M. Not that it will change a lot, yet there. Regards, Alberto
I prefer my own tests conducted in the real world rather than the theoretical musings of someone who borrowed a car for a day or two and understood all. . I am quite happy to watch my dials rotate, I never much cared if it was 148 or 151, just that on numerous occasions 120 miles were covered in 60 minutes with the needles planted at 6000 and 120, so I just figured that dials were fairly accurate and that 7500 would get you close to 150. Now if a mechanically driven dial and an electronically driven dial, remain in synch and behave in a way that mimics the book, then It seems to me that they are accurate. On the other hand, if an indicated 8000 rpm and 160mph is really 142, then both dials must be erring to the exact 11+ %. additionally, the error would come in above 6000 rpm because at 120 mph they are accurate. One would have to miss a mile marker by 30secs or the proverbial mile! Will have to check it out against a GPS, any one pushed a Dino recently?
