RS 4.0 lap time on The Ring:
07-27-2011, 11:13 PM
#32
There is 1 key point to the RS 4.0 that everyone seems to be missing, the redline and limiter. It revs to 2500 rpms less than a 3.8l with the same transmission gearing. This impacts both the area under the curve and the speed per gear. Remember that acceleration is determined by area under the power curve. Because of the broader curve on the 3.8, this makes the power difference not as significant as you would initially expect. Gearing is also very track specific. Losing those top end revs may mean exiting a corner in a higher gear, lower in the power band.
07-27-2011, 11:47 PM
#33
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metzger 3.6, 3.8 and 4.0. they are all the same engine design since 1998.
the 997 body is the same tub used since 2007.
The only way to get more speed is a larger engine and sequential shift.
This is what the 991GT3 will need to address.
the 997.2 4.0L is the peak of the series. Not much else can be done to the platform.
Why they waited until now to do it instead of 2007 model year is beyond me...... they had the ability. It would have kept them more competitive in the performance market place.
the 997 body is the same tub used since 2007.
The only way to get more speed is a larger engine and sequential shift.
This is what the 991GT3 will need to address.
the 997.2 4.0L is the peak of the series. Not much else can be done to the platform.
Why they waited until now to do it instead of 2007 model year is beyond me...... they had the ability. It would have kept them more competitive in the performance market place.
