Bill S.

We started the 60 to 130 MPH craze on this forum. I wonder if we might do the same to get the car manufacturers to publish HP vs MPH for their sporty cars while shifting at redline? That will help people determine how a car will "feel", especially now with the new AMG cars and higher-revving sports cars. Of course, you will need to consider the car's redline and weight to imagine the feel. Here's a starter for the CGT. Does anyone have this for other cars, like the new GT2 or Ferrari Scuderia?

JBL930

How do you go about getting the data? Looks interesting

Bill S.

It's not too easy. You need to merge the HP vs RPM engine chart and MPH vs RPM gearing chart you see in the Owner's Manual. That is, get the RPM and HP for 0, 10, 20, 30...180 MPH, put it in Excel, and graph it (see below for what the spreadhseet would look like).

Note the amount of color (power) for the CGT chart from 110 to 180 MPH. The CGT basically stays above 550 HP the entire time. If the aerodynamics were better, it would reach 180 MPH much sooner with that power.


MPH CGT RPM CGT HP (KW) CGT HP (SAE)
0 0 0 0
10 1700 75 100.8333333
20 3500 175 235.2777778
30 5500 330 443.6666667
40 7000 420 564.6666667
50 5100 280 376.4444444
60 6000 370 497.4444444
70 6900 410 551.2222222
80 8000 450 605
90 6500 380 510.8888889
100 7200 425 571.3888889
110 8100 450 605
120 6900 410 551.2222222
130 7500 430 578.1111111
140 8000 450 605
150 7300 425 571.3888889
160 7700 440 591.5555556
170 8200 440 591.5555556
180 7200 425 571.3888889

bbs993tt

Good stuff, Bill. You must be an engineer or something. Wish I was that smart.

Stummel

that is amazing!

I never thought that you could put nearly 600 horses down to the pavement at 40mph.

Jean

Bill

Here is a graph of your own RUF back when you did your 60-130mph. I have been using these graphs for the last 3 years for both HP and Torque in all cars that run with datalogger. This is adjusted for aerodynamics but not slope or rolling resistence. The average of 473BHP (red line) takes into consideration the gear shifts where HP drops to close to 0 depending on how fast the shift is, so real average is higher than that.

If you have a CGT 0-300kph run I can show you what is going on in real life and how it compares to the manual

Bill S.

Nice Jean! I was thinking of doing this with factory published data because of the issue with getting accurate SAE HP readings and not knowing if people shifted properly or took the engine to redline. What do you think? Could the GPS charts be compared to factory charts?

I only have 60 to 130 for the CGT. See below...