fastlane

The same run at the dragstrip 1/4 mile will always show a better time. When you stage at the strip you have between 6 in and 12 in of rollout that works out to about 1 to 3 tenths in the 1/4 mile if you shallow stage the number is better a longer rolling start. You are not getting a rolling start with the box it starts on movement. 12 inch of rolling start transfered down track at the end of a 1/4 mile adds to MPH also because you are really running 1321 ft vs 1320 ft.

I am not sure I have not looked at the shift points. I used it in traffic or on the phone whenever I need my hands, but I think it shifts at or near readline. It can be used in regular or sport but sport is the way to go. I can test mine but not until the weekend.

People think the Murcie Egear has no auto mode it does, it is not known because the factory does not put out the Info. for reasons of its original MPG testing for USA. Just pull back both levers and hold for 12 seconds you will hear a beep and then you are in Auto mode if you had it in Sport it will still be there. Believe me Auto is their.

Why not try pulling back both levers that puts it in auto mode and also leave it in sport it will shift for you in sport mode. Yes I know it is a Murcie.

On the LP640 the speedo is off 9% the dash computer is tied to the speedo, but the odometer is correct it picks up off of a different sensor. The GPS has a built in speedo and is dead on. As an example 155 Mpr on speedo is 142 Mpr. on GPS

OK I went down to the garage, all you have to do is slip under the back of the car, the vacuum line is on a tee from both valves right at the back of the car. Just take a plier move back the small hose clamp pull off the rubber line and plug it, you can use a machine screw, put back the hose clamp. You can put a rubber end cap over the other end just to keep the dirt out. It is much louder from idle to 3500-4000 Rpm then it is the same because the valves would be open anyway. To me it sounds more high pitched less of a deep sound. If you like it loud it is free noise. Exhaust sound is a subjective thing if you don't like it it can put it back anytime in 5 minutes.

An easy way to keep them open is pull off the vacuum line from the valve and put a plug in the line to seal it, the pump will still run and the system will not know the difference. The engine idles at about 1000 rpm and the valve opens at 3500-4000 rpm during that 2500-3000 it could have a very small loss of torque maybe a few ftlbs but it could pick up a few HP at the same time in that narrow rpm range. I think the difference will be so small one way or the other if you like the strong sound off of idle it is worth a try. The process should take about 5 minutes. Most car company's that use the valve system do it to pass the drive by noise requirement.

Yes but does the LP640 have a valve system. With all the talk on the forum about exhaust I haven't read anything about one.

Is there an exhaust valve on the LP640 that stays closed untill 3500-4000 rpm to keep the exhaust sound lower. I have that system on my DB9 and bypassed it by disconecting the vacuum lines it locks open the valve for better sound at lower rpm. If there is one what has been the experience with the bypass.