|
Rene, first of all, the I5 engine in your S60 is designed for high-rev operation. There is absolutely no way to change the RPM with chipping. The engine speed is tied to the wheel speed via metal gears and nothing short of changing those gears (or wheel size) will change the RPMs. What you have observed with the LPT is a different gear ratio in the final drive. I am not sure why turbos have a different (higher) final drive ratio, but I am sure there is a good engineering reason for it (torque difference between the N/A and turbo?). If I were you I would enjoy the ride and not worry about the RPMs of your engine. In fact if you drive it mostly on highway at an average of 80 mph, the engine should live for a loooong time, since it is near its optimum power and torque. I love to get my N/A S70 to about 4,000 rpm because at that speed the engine comes alive and feels very healthy (I have a manual gearbox, so I can have my fun at any speed). Also, the valve train gets cleaned when the revs are over some threshold (I think somwhere around 3K), at least on my '98, the newer engines may have an updated valve train design. In any case, you have a high-rev engine and you are not abusing in the least by keeping it around 4K RPM for long periods of time, in fact I think you are running it cleaner than if you putted around town all day. So, enjoy and don't worry.
Cheers.
--
Vladimir. 1998 S70. Base, 5-speed manual.
|
