14.2 1/4
60' 2.2
.544-.681 reaction times

.... on every run (made 4 passes) WTF ? Could it be that we are at 2,200 ft. elevation in Vegas, it was 110 degrees out, and maybe the HRE rims? I'm pretty discouraged with these times. I thought the c55 was supposed to run 13.1's???

With an automatic, it's pretty hard to screw up driving in a straightline. And, even if I was the worst driver in the world, which I'm definitely not there is no way that I would run an entire second slower at a much lower MPH... that is just crazy.

This makes me not want to get the Kleemann S7. The best that would probably do would put me in the high 12's with this type of stock 1/4 time. I might just get a twin turbo porsche.

On a positive note the first run was against a WRX STI and barerly beat him, second pass was against a mitsu evo - beat him, the third against a turbo civic hatch - beat him, and finally a z28 and beat him... so I guess it wasn't all bad.

 

Couple of things.....was your ESP on or off, it MUST be off on all runs. It was very hot, you should let the car have a decent cool off period after driving to the track if you didnt on this outing. Your 60ft needs to improve. The altitude did not help you. Your resonator deletion does nothing for HP and may take away some torque. Your best times will probably be with the stock wheel and tire set up, but you can still get better then 14's. The dragstrip takes practice, I have over 150 runs down the strip in my 2000 E55, and yes when I started I have a few 14 sec time slips, but now I consistently run mid 13's in the 105's with 78k miles. My car is a bit heavier then yours with a few less HP, so your car should be running better times and MPH, just get back out there bro!!!! Good luck.

Jason

 

I wouldn't be too discouraged b/c doesn't the WRX and the Evo run similar times to that of the C55 (mid to low 13 seconds in the 1/4 mile)? I think the C55 is a bit faster but if you're beating these cars, then they are most likely affected by the elevation as you were. Sounds about right.

I'm interested in tracking my car to see what I could get. There are some days my C55 feels damn slow and other days it's a roaring beast. I want to test it pure stock though, tires and all.

Nick

 

Like already said, you ran with cars which run comparable times to the C55 and beat them. Don't get enamored with trap times and speeds, especially when you are in high heat at an elevation. I have seen C32s driven by less-experienced drivers run low 14s and 100 MPH even at sea level and with cooler weather.

 

wow...slow...

 

I dunno' sounds possible for the conditions. Here's a C55 doing 14.5 @ 100 at a track 5500ft above sea-level:

http://s27.yousendit.com/d.aspx?id=3...L12X9TCXDW4GGP

 

nah its not the wheels. i ran a 13.2 on my 19" HRE's. It takes lots of practice. I still cant launch. I know with a good lauch i can hit atleast a 12.9. I know its possible. I just get so excited and always floor it to fast and spin to much. The only time i ran a 14 something is when i was spinning down the track sideways, lol. Your MPH is really low also. Its all in the launch, your 60 ft. time is not that good either.

 

Where did you run a 13.2? What elevation? What was the temp? Did you shift yourself or have it in S drive? Did you turn off your ESP? Do you heat up your tires? What air pressure did you run? And finally, how do you launch? I just floored it in 1st and let it shift from on it's own from there.

 

holy **** thats alot of questions! lol

I ran there here in Florida, so it was at sea level. It was probably around 85 degrees out, atleast. I left it in auto. Thats the only way to do it. Dont try to shift yourself. ESP was off. I always heat up the tires a bit. I think i had my pressure at like 27psi. I just went easy on it till i felt it wont spin and then floored it. Again, i really suck at launching. That was my best time i ran with the C55. Other times i would just keep running 13.3s or 13.4s. I wanna try some drags radials soon.

 

1. your at a high elevations, your times are going to look a lot slower....you need to run at a track that is at sea-level.

2. what was your 60ft time?

 

At 99mph, you know the car is not putting down too much power, but then it would make sense with the heat. Elevation doesnt make up that much

 

 

Good info - thanks Neal.

So are you saying that the lack of power might be a result of the heat? That is definitely my guess.

 

110 = bout .4 to .5 loss......car already has heat problems anyway with blower

2200 ft = bout another .4 sec off

Actually you did fine considering. Not what you wanted to hear, I know.

I am at 4500 ft and my E55 with Klee 2 ran 12.7 consistantly, while same modded car ran 11.7 at sea level. Blowers sure can be frustrating at higher alt. Everyone worshipping my car for running 12.7 while I am swearing at it, knowing what she will really do.

 

My guess, it is a combination of heat - 110F, altitude 2200ft. and 91 gas.

At sea level you are probably around 13.5 at 105. On a cold day - 50-60F - you should be in low 13th at 107-108.

Next time try mixing some 100 octane gas and icing the intake.

60' time can improved upon with combination of powerbraking and tire pressure. It takes anywhere from 5-10 runs before you find the optimimum launch techique for you, your car, your tires and the track.

Now, what really sucks - on the street - it will not work.

 

I can see it now.

'Yo bro, wait a second, let me pump up the air in my tires and get some ice to cool down the air before we do this run.' :o

BTW: Vadim, clear your inbox.

 

"110 = bout .4 to .5 loss......car already has heat problems anyway with blower"

Say what? The C55 has a blower (other than the driver)?

 

Jakpro has an E55, so that's what he was thinking about IIRC.

 

Very good points... Thanks Nick.

I'll tell you one thing... you guys made me feel a lot better about this 14.2.

I actually considered that, but I wasn't sure if boosting the octane on a car tuned for 91 would screw anything up. It's okay to occasinally run 100 octane in an MB?

Can you tell me a little more about powerbraking? Elaborate on the technique. Thanks Vadim!

 

It is okay to run higher octane because the ECU will take care of it.
What's it called? I know if you run lower octane it'll retard the timing.
Would advance the timing be the correct term?

Powerbraking IIRC is holding down the brake, and then applying throttle to get the revs up and into a better spot of your rpm band. It's really easy to do

 

altitude affects n/a cars more than turbo cars, but at 110f, it must be killing those intercoolers with heat soat...so those turbo'd evo and subies would be biting it just as much..as evidenced by similar runs to u

don't sweat it. if u do, work on the launch..

 

powerbraking on the C55 with my experience only created more difficult launch with more tire spin. I dont think its needed, especially if you are trying to learn how to lauch normally.

 

i think powerbraking helps teh launch b/c you load the torque converter rather then giving it and teh diff a sudden yoke by shocking it as you are releasing the brake and hitting the gas from a dead stop!!! Its a matter of how deep into the throttle at what time after you launch. I always powerbrake and load the torque converter at the track... on street tires I pull off 1.9 60ft times consistantly on a mildly ok track prep!! Its a matter of finding the sweet spot and controlling your wheel spin. Your 2.2 60ft time means that your either launching too hard or too soft.

 

If I were to shave 3/10 secs off on the 60', is it an even translation on the 1/4 time? Would the 14.2 become a 13.9 or would it be even lower?

 

Power Brake, Stomp and Steer!!!!!!!!!!!WOOOOOOOOOOT!!!!!!!!!!!!!!