Prime Time Track Rental

B8 S4
#42

Sak, all I used was power = force * velocity = (car mass * g * sin(slope)) * (average velocity). I’d have to integrate to do it properly, and I failed my math courses many times over, so no thank you.

I have a better idea, I’ll use cartest, which applies pure physics to solve a car’s acceleration. It can correct for slope. Don’t forget engineers excel by being lazy. But first I’ll put the kids to bed…

Sweet. FWIW, if we can get some fast cars up here and us GTA folk, that would totally be worth it.

And yes, if Thompson is really a magical track where fast times are made, I have no problems going there to set a fast time, I’d love that. I went to ATCO in the freezing cold of February because of it’s 33 feet of elevation and everybody said it’s fast (if they didn’t force us to go through the water box, it would be, I’d say). Nobody else really seems to call Thompson a fast track though.

#43

[quote=“Jspazz,post:42,topic:3695”]
You think a better idea than actually testing the car would be to plug numbers in a web site?

[quote=“Jspazz,post:42,topic:3695”]
have you ever heard of ubly drag way? Me neither before this thread.

Nor have I ever heard of Thompson. Its a small empty track on the middle of rural Ohio lol.

#44

lol sak. True true.

Well simulators are good enough for F1, so cartest is good enough for me. Don’t knock it until you’ve tried it, you can completely model your car, from minute gearing changes to the CG even, and the physics and numerical analysis it uses is solid. It’s like a 15 year-old program and stands the test of time, which is why you don’t really see new programs coming out.

I used my S4 model based on my car to keep it relevant. Consider all the car dimensions, tire size, Cd, frontal area, weight balance, gearing, dyno, launch RPM and launch behaviour, shift time, clutch slip time, wheel and tire weight, rolling resistance, tire expansion factor at speed, rollout, air temp, air pressure, humidity, etc etc all inputted in. So I had already ended up modeling at my goal of 11.99@116.5, which is maybe optimistic but hey it’s my goal, and still pretty close to my actual 12.08@115.1.

So…without further ado…here are the results.

1/4 mile:
0%: 11.99@116.5
1%: 11.92@117.5
2%: 11.84@118.5
3%: 11.76@119.6

60-130:
0%: 11.72 sec, 1732 feet
1%: 11.32 sec, 1656 feet
2%: 10.92 sec, 1606 feet
3%: 10.57 sec, 1552 feet

I think this also proves what you are saying, Sak, as to why the debate on 60-130 and slope is so important. But it seems to apply less to the drag strip, where we are measuring the time to distance as opposed to time to speed - time to speed is clearly a bit irrelevant of a measurement in racing - speed needs to be integrated mathematically to get the distance, and time-to-distance is always the ultimate goal.

It also indicates to me that going to Thompson would shave the 0.1 seconds I need to get my 11.99, hoping that the DA is good though - however, if DA is plus 1000 compared to here, I think it’s a wash.

Updated Vbox list.....
#45

Ok now I’m solving for tailwinds. Looks really interesting so far.

#46

Well if you guys want to come up I have our cottage just down the road about 30 minutes and it will hold us there. We just clean the bedding and leave 200 for the cleaning lady done! So there u have it. I chose Ubly because it is going I be fun, semi central location, and they also have the track open the next day as well!
I was speaking to MhP today and they are probably going to come up and bring some Mercedes as well, e63 and sl 65. Dad will bring some of his toys and a few other people.
Just an FYI…
Ps MHP is in Columbus I think.

#47

Tailwinds:

1/4 mile:
0 mph: 11.99@116.5
10 mph: 11.96@117.2
20 mph: 11.92@118.0
30 mph: 11.90@118.6

60-130 mph:
0 mph: 11.72 sec, 1732 feet
10 mph: 11.37 sec, 1675 feet
20 mph: 11.07 sec, 1627 feet
30 mph: 10.81, 1587 feet

Again, the 1/4 mile seems to be less affected. This is interesting for Bear, since his time was only aided about 0.08 sec compared to no tailwind, or 0.05 sec compared to 10 mph tailwind - and I think a lot of other people’s fast times are set in “some” tailwind, to be fair.

Going back to the program to see what a supposed Stage III setup would do at the strip, if it had some decent power…

Updated Vbox list.....
#48

Snap! October 5 may be difficult for me to swing. Usually can’t get off work on a weekday. I was thinking this would be a weekend thing. In any event, it’ll probably be a game time decision for me, so I’ll have to let you guys know without much notice . . .

#49

Saturday they are running too and may try to rent both days

#50

so did you guys decide on a location? It is in Ohio I’d possibly swing by to hang out.

#51

Cool

What is MHP?

#52

inky freshest. Worst possible location for you…north of Detroit a bit.

P.s. Inky freshest = Ubly dragway in the mind of the Samsung Note lol

#53

http://www.theublydragway.com/

#54

is it Modern Horsepower, the guys who do the nasty heads/cam/headers C63s?

lol, inky freshest didnt know we were going to compton. But yeah North of Detroit is a trek

#55

http://www.modernhorsepower.com/

Go to you tube and type in mhp c63 or e55 or e63

#56

You have a place to stay

#57

oh man… http://www.youtube.com/watch?v=nki6UulzYmM&feature=player_embedded

#58

I am excited…where is Primetime???

#59

That’s a nitrous car… I believe they have a non nitrous C63 in the high 10s. But the cars look pretty committed…and faster than the rest by a lot, sorta like Primetime to the rest of us. The normal headers/tune/skinnies cars end up mid-11s.

#60

4-1/2 hours away :slight_smile:

#61

I think he meant, where has Primetime BEEN?? Haven’t seen any posts from him in a while…