[Shotimes] CVT's, torque and horsepower

[Ron Childs]

Interesting. Nissan must have compared a Murano programmed for hp peak and 
found it was not as good a performer as the one that ran beyond peak hp at 
WOT. What do you think would account for this?

-Ron Childs


>From: "Ron Nottingham" <nottingham@alltel.net>
>To: "SHOtimes" <shotimes@autox.team.net>
>Subject: [Shotimes] CVT's, torque and horsepower
>Date: Fri, 17 Jan 2003 17:21:35 -0500
>
>OK, to add a little more fuel to the fire...
>
>Nissan's new Murano uses a CVT.  The Murano is a 2-ton Altima based SUV,
>with a 3.5L V6.  This V6 has power peaks at 245hp @ 5800 rpm and 246 lb-ft 
>@
>4400 rpm, it redlines at 6500 rpm.  Car & Driver's test in the Feb '03 
>issue
>states that best acceleration (0-60 7.5 sec, 1/4 mile 15.9 @ 88mph, tops 
>out
>at 116mph) occurs when the engine is at 6250 rpm and goes through the CVT's
>ratio range of 2.37 to 0.44:1 with a 5.17 final drive ratio.  Around town,
>it stays near peak efficiency (torque peak), for everything short of
>wide-open throttle.  Best acceleration occurs not at peak torque, nor at
>peak horsepower, but a little above peak hp!  I'm sure Nissan didn't just
>accidently guess at this, as they could easily have programmed the engine
>management to accelerate anywhere in the engine's rev range.
>
>Ron N. - Dalton, GA
>90 SHO
>_______________________________________________
>Shotimes mailing list
>Shotimes@autox.team.net
>http://www.team.net/mailman/listinfo/shotimes


_________________________________________________________________
MSN 8: advanced junk mail protection and 2 months FREE*. 
http://join.msn.com/?page=features/junkmail