91K-Man

Mantissport and ACE Speed Lab have a winter special princing, $1,400 pr hr rate.
Coaching available

Do your Aero/Thermodynamic testing, drag,cL, cd, downforce. Check your radiator,brake ducting,oil cooler @ temperature and speed, speeds up 160 mph.

Get the base line on your GT4 Aero numbers


Call 905-844-6219 I will be @ Sebring, Mantissport 001 SP3 944

91K-Man

Simulate summer temperature,humidity,car speed,loaded engine on 1000 hp 4WD Dyno in the windtunnel. Weather conditions can be set from -20F to 120F, relative humidity 0-100 %, simulate engine at speed as on track up top 160 MPH. Check out your cooling system/oil coolers, brake rotor temps, ducting. Roll car 3 feet on to scales for Aero work, drag,downforce,CL,CD.

mark kibort

interesting the values didnt go up with the square of the velocity. it does for wings, maybe the efficiency factor on the entire lifting body of the car is much less as the speed increases. Drag should... It looks as those numbers are at the low and high speed, except for the HP and drag at the lower right.

Ernie J

ITs at 1 speed the data, 100 mph or 160 kph same thing.

PPo

Ernie... Myself and my team will come talk to you later in the season. Campaigning a 924S in Canadian ChumpCar, and we realize that aero may be our best friend according to the rules... and I know you have experience with the S2 in the wind tunnel...

-Patrick

mark kibort

oh yeah.. it looked like it was a change of DF test. one at 100mph and one at 160. I see... all at 100mph (or 160kph). so the forces are what? not lb and Kg, but two measuring points?

that would be a lot of fun to start playing with things on the car, especially if there were many things capable of altering up front.

Cory M

You know you're a racer when you spend $1400/hr to wind tunnel test your $500 chumpcar!

Ernie J

Downforce in lbs, speed in both. Aero testing at least you know where you stand, you could chase an aero push ,but dont know you have one and think its mechanical issue. check out the "full scale windtunnel test 350Z " video , it had no front downforce to start with. It did have a large splitter on the front ,but it wasnt turned on, wrong angle of attack. Only way to find out whats going on ,is the measure "it", downforce or the lack of "it". The tool is available, use it or guess.

mark kibort

so front downforce is 12 and 22.... which is which?

Ernie J

12 lbs left side 22 right side

mark kibort

interesting the disparity left to right on the downforce.

ok, i give up.. the side downforce two numbers???? why are their two numbers there? per tire?

PPo

It's only logical right?!?!

Besides, its a $500 ChumpBucks car! ;-) The 924S, totally "stock", is valued at $400 ChumpBucks to start. If we custom build the aero, and do it right, it's speed we can get with very little penalty points.

Also, with 4 drivers, it's $1400/4 = $350/hour each. Not saying we will use a wind tunnel, but once we sort things out for the first few races, splitters, flat bottoms, and fixing airflow looks like the best choice for adding speed according to the rules.

Happy to be wrong...

Matt Romanowski

How many hours are needed to start getting some good data?

Ernie J

Less than an hour, we can do 60 mph to 160 mph in 10 mph steps, then start tuning , there are 3 hoists there so if you need to work underneath the car you can. Or you can do what ever in the tunnel, just NO loose debris on the floor afterwards. I have always do every thing in the tunnel , saves time. Plus I practice
what I think I am going to at the shop. 2 hrs will get you petty far as get a balanced aero setup. I am also available for Aero coaching.

mark kibort

really,
It looks like the right and left number add up to the center number. up front.

i.e. 8R plus 4L is the 12 lb number up front... what is the 22 number for?