I ran my cayenne turbo yesterday 0-60 mph in 5.208 seconds according to my Gtech meter. 60 foot time was 2.151 seconds. I of course had the PSM off and suspension set to sport. I power braked a bit on the launch (2000 rpms). Anyone else have any experiences they want to share?

 

Wow...nice to see someone doing that. I haven't done it w/ my CT yet, but I did it on the '05 M3....even in that launch control mode where it revs to 5k rpm and drops the clutch, I couldn't get minus 5 seconds. This hasn't been just my experience but that of 2 friends who have them as well. Seems BMW is a tad optimistic on their numbers.

On the other hand, I always seem to be able to beat Porsche's quoted 0-60 times (as do most magazines). Anyway, I'll have to get a tool for the CT and try it. I've noticed both Road & Track and Car and Driver quote it at 5.0 seconds in the back of their magazines...I was curious to try.

matt

 

I've been thinking about putting my CT through this as well, what numbers did you get back for HP ?

 

I ran a 12.8 in a chipped TT at the track a while back...

 

This is an interesting alternative device to the GTech:
http://www.race-technology.com/WebPa...roduction.html

Or if you prefer a non GPS based system:
http://www.race-technology.com/WebPa.../AP22Spec.html

 

I didnt set it up with all the info to get HP or TQ numbers, I just wanted to see what I could get for 0-60. I pretty much a novice when it comes to launching, so I was pretty happy with the 5.2 result. This was on the street too, not at some track.

 

Do you have the hesitation issue?

 

Theres some hestiation with PSM on, but turning that off solves any hestation issues.

 

I would bet that you know this already but 0-60 times are based upon two adults sitting in the front seat. Generally speaking Porsche's official times are pretty conservative. I have also been able to get close to 5 seconds but certainly not under.

 

These units tend to be very optimistic based on their "roll out" setup, in other words the unit doesn't start counting until the vehicle has already moved off the line. The road also needs to be perfectly flat.

Setup properly and on a flat road they can be accurate!

 

car magazines use the roll out set up too....

 

Here is one I ran. I was pretty gentle on the launch. I dont know how durable that tranny is. I dont have the hesitation problem....

 

Here is the HP/torque plot from the same run. This was a run for ETs not hp/torque. You will notice that the data is measured in third gear after the torque peak. The hp peak seems low but this was measured at 80 mph or so (IOW alot of aerodynamic drag). The weight is my estimate. There seem to be two schools of thought on the weight of these beasts. I think Porsche reports around 5200 but MT said 5700. I will probably take it to a moving van scale and weigh it myself with full fluids and me inside. Porsche reported a very low weight for the 911TT (as I recall ~3400 but mine weighed 3560) so I guessed on the high side for the cayenne. The rpm pickup worked beautifully. The run was at sea level, 88 degrees, 70% humidity. I think I can do much better when the first cold front blows through.

 

Thanks for the input, your run is pretty similar to mine. What was your method for launching?

 

Have you tried this for launching: hold the brake, build boost and let go. I tried it but it went into safe mode. I have a GMC Typhoon and I can launch violently like this killing motorcycles for the first 60 feet.