Originally Posted By CBY
I made estimates on the French forum in order to compare different configurations and motors on a PLUS 4 basis including the ARP4. I didn't have the ARP4 handbook and the estimates are made on a basis of 39 km/h at 1000 rpm instead of 42 km:h at 1000 rpm.

Have a look on the different charts, in French, sorry.

a small lexical:

courbe de puissance : power curve
puissance necessaire: power used for air and rolling resistance
rapports de pont: rear axle ratios
réserve de puissance: power reserve= motor power - power used (air resistance)

http://mog.vosforums.com/viewtopic.php?f=9&t=6817&start=500

post on february the 17th 2016 6:53pm

The concern is the final drive ratio. Maximun speed could be reach with the 4th gear.

Translated from the link above:

At first glance, the Cosworth power difference compared to the standard Duratec 2L (142 hp)

between 2000 and 2700 rpm -3 hp average for the COSWORTH (2700 rpm vs 61 hp 64 hp)

almost equal between 2700 and 3000 rpm

between 3000 and 3900 rpm +3 hp on average for the COSWORTH (3800 rpm vs 93 hp 96 hp)

between 4300 and 4800 -7 hp average for the COSWORTH (at 4600 rpm 113 hp vs 121 hp) the flattest part of the curve

The power shoots up from 5000 rpm:

+10hp at 5100
+23hp at 5500
+40hp at 6000

Any errors in translation are mine.

Peter

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