All, I've been doing and have done extensive research on the '10 XKR as I will be purchasing one in the near future. In my research I see varying 0-60 times. I've seen as high as 4.6 and as low as 3.8. It seems like I see 4.6 and 4.0 more often though. What is the true time? I would really like to know. Thank you.

 

Edmunds Inside Line explains this nicely here: How We Test Cars and Trucks

After reading this you'll understand some use a roll-out for 0-60 but that makes it 5-60 in reality. On the otherhand roll-out is perfectly acceptable in 1/4 mile times.

I've come to rely on Edmunds Inside Line for truest numbers for comparing different brands and models and since my personal results on numerous cars come closest to their figures.

Additional info: 0 to 60 mph - Wikipedia, the free encyclopedia

In reference to the other thread the 4.2 maybe be close to the 5.0 in 0-60 (0.3) but the variance in 1/4 mile is even greater (0.8).

 

Thanks Mike V., the video was very informative. Thanks again!!!

 

I got these times off of Edmunds:

Acceleration, 0-30 mph (sec.) 2.0
0-45 mph (sec.) 3.2
0-60 mph (sec.) 4.5
0-75 mph (sec.) 6.3
1/4-mile (sec. @ mph) 12.6 @ 115
0-60 with 1 foot of rollout (sec.) 4.3


Mike V. and everyone, do you think these times are accurate? Afer viewing the video Mike V. provided, I'm convinced Edmunds does their due dilligence to get accurate times, but I would like to hear what real world 5.0L XKR owners have to say. Thank you.

 

I got 4.4 with my husbands vbox hooked up. I did not use a rolling start and didn't leave any tire on the pavement ( I tend to baby my car) I think a 4.1 or 4.2 is definitely doable.

 

~4.02 - 4.05 under good conditions

 

Was this done with a stock XKR or do you have any mods?

 

Mod's I've done have yet to show me any real difference. I ran nearly identical 0-60 times both stock and after a flash/pulley.

It's tricky to get those times on street tires, but possible. On drag radials, they can be had time after time.

 

So you did the ECU tune/pulley and didn't noticed anything? That's disappointing. Who did the mods for you? From what I've been reading in this forum, I thought that gave you a significant HP increase.

 

I bet the pulley and ECU really come alive on the 0-100 mph test more than 0-60.

 

Yeah, well...jury is still out on the pulley and latest ECU flash. Friend of mine here, BigCat, saw improvements on a dyno. However, so far, I'm am trapping not a bit higher that I did stock at the track. I'm giving it another try this Friday, since the last time I was there was obscenely hot and humid out.

Jay

 

Please be sure to posts your times/results. I am looking forward to it. I am very interested if the pulley/ECU mods that I've been reading about for months is actually worth the money. I've seen post in this forum where ETG is stating you can get an increase to 590 HP on the 5.0L XKR with just these mods. So please keep us posted. Thanks.

 

Philly Single, Did you get a chance to give it a second go at the track? I would really like to know whether or not there were any gains from doing the ECU tune/pulley. Once I purchase, that was to be the first item on my "modding to do list". But if there aren't any really noticeable gains, then why waste money? Anyway, just looking forward to your feeback. Thx.

 

Don't forget that weather and road surface make a big difference. Some magazines actually correct their times. In sanctioned drag racing, they don't correct for weather, although there are sites for calculating it, but they do correct for altitude - which really makes a difference if you are talking a couple thousand feet or more.