|
Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 57,063
|
Just a basic check using one of the online calculators.
Assuming that there's no overdrive on the trans, the difference between 2.2 and 2.73 at 70 mph would be 2070rpm vs 2570. I can't imagine that the 500 rpm would be that big a deal, especially since I suspect the transmission would actually have some overdrive on the final gear which would drop the RPM lower.
Another check, 6000rpm 245-45-16 tires, 2.73 rear with no OD, speed would be 163mph. The same rpm with a 2.2 rear would yield 202mph. I don't think you've got anything to worry about on the top end. I have no idea what the redline of a 928 is, but I assume it's at least 6k. And how often would you find yourself at 160 thinking "if I only had another 40mph!"
__________________
Steve
'08 Boxster RS60 Spyder #0099/1960
- never named a car before, but this is Charlotte.
'88 targa  SOLD 2004 - gone but not forgotten
Last edited by masraum; 10-20-2016 at 06:17 PM..
|