Prime Time Track Rental

I think he meant, where has Primetime BEEN?? Havenā€™t seen any posts from him in a whileā€¦

Yeah I knew thatā€¦ask Saki

Ya I know. Ugh - forum drama. People take things too seriously on the interwebs. Sak just throws out facts - has never bothered me. Maybe Iā€™m just used to counter arguments given what I deal with on a daily basisā€¦

Lol is he all pissed off that I mentioned his track is downhill and that I think thatā€™s one reason giac and revo canā€™t match his times? . He asked why revo couldnā€™t match his times on audiworld.

I said: because there are no revo pulley cars, nobody runs race gas full time like him, nobody has a modlist as long as his ($10,000+ now) and very importantly, because his drag strip is 1.3% downhill. Is any of that wrong? He appears to have taken those items personally. Not sure he shouldā€¦it is not a big deal. We are just measuring car acceleration.

Actually I donā€™t think that has anything to do with it, but I was curious what you thought anyway.

Soā€¦you never commented on my simulation 1/4 and 60-130 when isolating slope and tailwind? Again this is using a program that uses full numerical analysis on the actual formulae, not someoneā€™s guesswork or rules of thumb or interpolation of prox data.

I think it agrees with what you are saying clearly about the 60-130, but not about the 1/4 mile.

So why did you say ā€œask sakiā€? Re primetime?

I just saw that stuff now. It proves that ink sticks to paper. Now lets actually test it. I do think it is hilarious that you seem more interested in the simulation than actually testing it. I donā€™t think you will find too many people who are willing to take a calculator as ā€œproofā€ of anything in the non B8 world.

Didnā€™t you use that for something else earlier and it was way off?

Few things we should get straight, even though I know I am willingly becoming Saki-bait.

Prime never said it bugged him, which is why he clearly said he was done with the matter, and stuck to his word. It actually just bugged me the way you carried on, implying that 1.) he is at some magical cheater track which can make your dreams of 11s come true and 2.) his times would be 12s at any other track.

Itā€™s clearly not true, and if you like, show me what you mean, with real numbers as you claim. You know Iā€™m a numbers guy, and I showed you my version of the truth, which is how any other race team with a computer or napkin or calculator would have done it. If you donā€™t believe in the physics that Newton proved eons ago, thatā€™s up to you. My initial approximation of 10 hp was based on plain-ass physics, and the full-blown numerical analysis agreed, showing about 0.1 sec and 1 mph, which agrees with 10 hp in my book. Letā€™s see what your pbox data says, since itā€™s what you are claiming as 0.3 seconds difference based on your pbox data.

Iā€™ve been going to dragstrips and circuits of all sorts on cars and bikes for 18 years, the S4 thing I do at the strip recently was only because the car sucked so bad at the road course when I took it (the first day after I bought it, no less) that I figured this car is only good for the strip. The appeal of TMP is that I can do both circuit and strip there, and the S4 has seen double duty most times it has been there. Donā€™t ever call me a bench racer. Lol, donā€™t forget, for your benefit, I even went out to mexico north at night just see if a tuned S4 was faster than an F430 from a roll, as your friend had claimed.

I just donā€™t see the point of myself driving 4-1/2 hours out to buttfā€“k Michigan - Iā€™d rather drive 4-1/2 hours to the track in question, Thompson, if its so magically fast as you claim, or get Prime up here where everyone else is. Anyhow, I can still do that later on.

No, it actually agreed that an RS5 based on Arins dyno plot could do a 12.5, as you claimed.

What it didnt show is that the new S6 has only 410 hp - it showed it had a LOT more, likely closer to 500 in the case of the test car. Analysis is easy between the S4, the S6, and the RS5 because they all have the same drivetrain aft of the flywheel, so there is no drivetrain loss differential between the cars to cast doubt in the analysis. Anyhow, silentbob disagreed only because he said the torque maps as calibrated are always correct, but admitted C/D could have been given a factory special. But weā€™ll know when people get their S6s later this year, if Audi actually reverts back to the original torque map and hands people a 13.1 second car instead of what they gave C/D.

I think the S6 will do well in customers hands but reality is that car and driver doesnā€™t go to a dragstripā€¦they run at a racetrack on the straightaway using vbox. Only motor trend has a real dragstrip. The conspiracy theories are a bit ridiculous. Does anyone really think a broad market company is going to take on reputational risk like that just to do well in a test? Anyone who assumes that hasnā€™t worked in a large company with a business risk team lol.

Calculators like that online one donā€™t assume that the tune is full bore till 5500 rpm, then handicapped artificially by boost cut (thatā€™s what the Audi tunes seem to do on the lower models to protect their upper models, i.e. S4 is restricted up top to protect RS4/RS5ā€¦S6 is restricted to protect S8 and eventually RS6 . The calculator likely assumes a ā€œnormalā€ path to redline, so it wonā€™t work all that well. Put a stock S4 in using advertised peak HP and torque numbersā€¦it will predict mid 13s I betā€¦even though the car can run high twelves. Put a B7 RS4 in too for fun. The na cars are likely closer to reality since they are pottery much full bore out of the box.

Thatā€™s why the B8 is advertised with 333 peak (really its 350-360 if youā€™re on good fuel) , but the profile is that of a 430 HP car, up until boost is bled off via bypass around 5000 rpm. Peak HP is not impressive but the car performs incredibly well because for 75-80% of the curve the car is kicking ass.

Same with the S6ā€¦the curve is that of a 500+ HP car but it is hamstring around 5000 rpm, via boost reduction in the tune.

When you enter in the full dyno plot in advanced parameters, itā€™s all there. The only thing you canā€™t really input properly is drivetrain losses ā€œper gearā€, which would be different, but itā€™s pretty complete down to clutch slip losses even. If you have modeled your own car well, which when comparing to 50 runs in my S4 I have a pretty good idea, then you can easily start inputting small changes to see the effect. I did a similar project almost 20 years ago using MatLAB for an assignment in school a long time ago, then found this, and itā€™s all there anyway.

The DOS version is free, if you like. Iā€™ll send you my data files if you want. http://www.cartestsoftware.com/cartest4.5/downloads/CarTest.zip. Iā€™d encourage you to have a look, seriously.

Using the Audi published curves and full specifications, the RS4 shows 12.9@108.3.

http://www.s2ki.com/s2000/gallery/page__module__images__section__img_ctrl__img__490903__file__med

A DSG B8 S4 stock shows 13.33@104.0, using this.

http://motorlust.com/motorlust/gallery/2010-audi-s4/s4080056_large__mid.jpg

Anyhow, I wonā€™t derail this thread further, you know my email Saki.

Iā€™ll wait until I can tune my car again, which means Michigan is out for me, as much as it would be fun to see those tuned MHP C63s. If there is a day up here at TMP, worst case Iā€™ll bring or borrow a different car so we can have fun with that as a point of reference.

oh neat I thought you just fed it peak numbers

So I need a head countā€¦
I know that Sack-Of-Mojo is in

Im in to try and beat MHP and there sl65

I appreciate the offer, but I probably cant make it. My two experiences with driving out to north of Detroit over a weekend ended up being extended much more than that lol

Get that S4 running!

I just re-read the thread - what time would the Ubly thing be kicking off on Oct 5th? Iā€™d assumed it was evening but canā€™t find any specific reference. I can make the evening - 7-ish depending on the border.

likely daytime for a track rentalā€¦hopefully evening though

Normally it is like 12-5or 6 or 7ā€¦
However you can come right ot the cottage and the following day we can go back if you want. It is not far. Where are you coming from. I can probably tell you how long it would take.

heā€™s coming from London, Ontario

around 2 hrs to 3 hrs depending on border/traffic

Only about 150 miles to Ugly

So about that list is anyone coming besides SackOfMojo?