posted this over at my.is too.

I thought this was kinda interesting. I just plugged in my 1/8 mile time of 8.85 and my mph of 81.57 to this calculator http://www.sjdsm.com/tech/0_60_calc.htm , and it told me that my 0-60 is 4.79 seconds. That's pretty cool. I thought this car was advertised to run about 5.3 or so.

 

using 0-1/8 time and trap speed to obtain 0-60 time is a ROUGH estimate.

 

Also does not take into account aerodynamic drag.

 

I don't belive aerodynamics play much of a role in 0-60 time, given the relatively low speed.

 

that's bs period...

 

your time was nice, but keep in mind that you ran in the cold! the general rule is that for every 10 degrees you will pick up a tenth of a second in the 1/4 mile. Most of the cars are running 13.9 at about 70 degrees. two guys have run this time. one had a time slip:

http://www.dragtimes.com/Lexus-IS350-Timeslip-7250.html (72 degrees)


the other guy had the same exact time at 77 degrees if you ignore his horrible launch:

http://www.dragtimes.com/Lexus-IS350-Timeslip-7051.html (he had a 2.4 60'. taking into account that for ever .1 second you take off your 60 foot, you gain 1.5secs in the quarter mile, his time is: 13.9 at 70 degrees with a 2.0 60 foot, just like the other guy.

so, your time is nice but I'm suspecting that you ran it at 40 degrees or less, so when you go back this spring and its 70 degrees out, you will run no faster than a 13.9. Now the 0-60 time put out by lexus, seems to be at this idealized 70 degrees, with a terrific launch.

Hope this puts things in perspective for you. Congrats, on your time, but don't read too much into it.

 

Here are a few more examples to help explain this for you.

my 2003 honda accord coupe(5spd auto with just an injen intake) runs 14.7 @ 97mph at 40 degrees. at 70 degrees it will do no faster than a 15.0 @94mph at 90 degrees its struggling ot do a 15.2, and so on. (this is all with a 2.35 60' on stock tires)

my buddy's 2002 ford mustang GT 5speed manual (stock) does a 14.4 @ 70 degrees, and a 14.1@ 40 degrees.

I also have another friend of mine who was lucky enough to run his new 2003 smg M3 at the same track. guess what? he ran a 12.9 stock!!!!! WOW.........but wait. it was 25 degrees that night, so when he came back during the summer, he struggled to get a best of 13.4!

 

lol, he run in cold? Of course he did. Is SAE correction good or bad? When C&D does it, then everyone will post they are not real numbers since they have been corrected. When someone posts 13.68, then they should be corrected? lol.

When R&T tests IS350 in 100 F at freaking 1000 feet and gets 6.x, and doesnt correct it, then it is ok... lol.

What you are doing is adjusting to the maximum, what he is doing is presenting an time slip saying this is what my car got.

 

Acutally they play a big role. Go out on the highway, roll down your window and stick your arm out doing 60mph. First hold your arm extended with your palm facing down. Now slowly rotate your hand so your palm faces forward. Tell me you don't feel a drag difference? Think of the size of hole the car needs to punch through the air. Yes, even at low speeds aero's play a role. Of course that role is amplified as the speed goes up.

 

I posted over at my.is too. I think as the times get lower this calculator gets more "off". At 9/75 you get just under 6s, which is probably doable - but my best 1/8th is 8.8/81 and it told me I'd have done 60 in under 5, which I've never even been close to.

 

except you are not running constantly at 60 mph measuring the 0-60 time--the average speed is approx. 30 mph (the acceleration is non-linear). Aerodynamics plays a significant role only in limiting the top speed of the vehicle.

 

In a 0-60 that has no effect.....



So what is the best 1/4 time that has by obtained by A IS 350?

 

YEah, aerodynamics play minimal affect 0-60, but over say 40mph drag does get worse. And air is a cars biggest enemy when u look at TOP speed. But not 0-60.

I think you should do a few runs and average them all out.

 

As far as I know, my 13.68 still stands. Fortunately for me most tracks are closed so I get to maintain my spot for a little while anyway.

 

I most definately will do a couple more runs, as there are some improvements to be made in the launch so I think a 13.5 may be possible. I have to either wait until the end of January when Firebird opens back up or make the 150 mile or so round trip to go to Speedworld and I don't know if I need to run that bad yet.