Sacramento Raceway - Mercedes Benz SLK Forum

General Discussion Topics must pertain to all 3 generations of SLK - R170, R171 and R172

 
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#1 Old 06-05-2007
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Sacramento Raceway

Just for those that may be interested. Here's my results for dragstrip last Saturday. Jliu also showed and I think he posted 11.8 @ 120mph with his Renntech. My results are basically stock.

Best Trap Speed
Reaction: .240
I1 2.177
I2 5.702
I3 8.588
I3 MPH 86.638
I4 11.050

ET 13.135
MPH 109.044

Best Trap Time:
Reaction: .319
I1 unk
I2 5.453
I3 8.315
I3 MPH 85.646
I4 unk

ET 12.851
MPH 107.879

Best Reaction:
Reaction: .197
I1 unk
I2 5.436
I3 8.307
I3 MPH 85.441
I4 unk

ET 12.870
MPH 106.334

Best 60' Time
Reaction: .512
I1 2.027
I2 5.498
I3 8.384
I3 MPH 86.583
I4 10.850

ET 12.940
MPH 108.679


Also, I had my car professionally weighed at Thunderhill. With a full tank of gas, it weighed 3441lbs. That's without the spare and with stock wheels but slightly larger rear tires. BTW, I believe each gallon of gas weighs 6lbs. Do the math.

With me in the car too, it weighed 3611. I weigh 170lbs with helmet. Corner weight as follows:
LF 977 RF 940
LR 868 RR 826

That equates to 53/47 weight distribution which isn't too bad. It's better than I thought it would be.
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#2 Old 06-05-2007
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Respectable numbers (except the reaction times )... According to the calculators, your making 319 HP @ tires and 376 @ flywheel.

wow, at dragtimes, the calc says Horsepower @ flywheel = 340.18 HP using 3611 lbs - 13.135 time - 109.044 mph

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#3 Old 06-06-2007
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I should mention that the weight at Sacramento Raceway (dragstrip) was a little less than what I weighed at Thunderhill. I would figure it around 3550 because I wasn't running a full tank there.

BTW, What calculators do you use? I was wondering if there is a calculation that gave approximate 0-60 times from the 1/4 mile data.

I'll keep working on my reaction times too. I didn't think they were too bad but I could always improve them.
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#4 Old 06-06-2007
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After a little searching, I found my own answer:
http://www.wallaceracing.com/Calculators.htm

It's interesting stuff. It says it's not absolutely accurate, but using it's formulas, it shows a best 0-60 time of 4.03.
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#5 Old 06-06-2007
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Here's a calculator that gave the better results
http://www.speedworldmotorplex.com/calc.htm

Then you got drag times that is probably more realistic.

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#6 Old 06-06-2007
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I have to say I'm pretty impressed with the 1/4 mile times- good job!

I may have said this before, but I had a 442 olds that ran 12.50's on NOS.

I can't wait to have comfortable car that can do almost the same thing!
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#7 Old 06-06-2007
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Thanks for the compliments. I question the accuracy of those calculators. I'm no expert but the 7G transmission has to be a factor and I don't think the calculators adjust for that. Anyways, it is a lot of fun getting times like that in a truly comfortable, hard top convertible.
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#8 Old 06-07-2007
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Your time is not much off the magazines time of 12.7, great job, a little more practice and you'll be there.

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#9 Old 06-08-2007
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Well, I'll be trying again in another week. There'll be around 20 (so far) of us that will make it to Sac Raceway. Majority are AMG with a few BMW so far:

1) Javier: 2007 CL 600 (EuroElites modded)
2) Jesse: 2006 SLK 55 Renntech
3) Michael: 2006 E 55 (EuroElites modded)
4) Scott: 2006 SL 55 (EuroElites modded)
5) Ben: 2007 Porsche 997 Promotive,
2005 SL 65 Renntech
6) Juice: 2007 CLS 63
7) Tom: 2007 E 63 Powerchip
8) Calvin: 2006 CLS 55
9) Tony: 2006 BMW M5 (modded)
10) Dan: 2006 SLK 55
11) Zoink: 2006 E 55 (pending?)
12) Blueknight: 2004 E 55
13) Michael: 2008 BMW M6 (pending?)
14) Tan: 2006 BMW M5
15) Articfox: 2005 Porsche GT3
16) Hisham: 2006 Corvette C6
17) Ray: 2007 E 63
18) Lawrennce: 2006 BMW M5
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