bern

Petit Le Mans
Road Atlanta / 2.54 miles
September 27-30, 2006 / Braselton, Georgia
Class Car Best In No.
Practice Session 2

Pos Pos No. Class Drivers Time Speed Lap Diff Laps Car Make
1 1 1 LMP1 Biela/ Pirro/Werner 1:12.781 125.637 12 - 19 Audi R10/TDI Power
2 2 15 LMP1 Johansson/ Mowlem/ Kurosawa 1:12.998 125.264 9 +0.217 15 Zytek 06S/Zytek
3 3 2 LMP1 Capello/ McNish 1:13.362 124.642 6 +0.581 17 Audi R10/TDI Power
4 1 6 LMP2 Maassen/ Bernhard/ Collard 1:13.482 124.439 12 +0.701 17 Porsche RS Spyder
5 4 16 LMP1 Weaver/ Leitzinger/ Wallace 1:13.667 124.126 12 +0.886 15 Lola B06/10/AER
6 5 88 LMP1 Minassian/ Primat/ Cambell-Walter 1:13.732 124.017 6 +0.951 12 Creation CAD6/H-01/ Judd
7 6 20 LMP1 C.Dyson/ G.Smith 1:13.814 123.879 3 +1.033 3 Lola B06/10/AER
8 7 9 LMP1 Dayton/ Gidley/ Meira 1:14.077 123.439 15 +1.296 17 Lola EX257/AER
9 2 7 LMP2 Luhr/ Dumas/ Rockenfeller 1:14.370 122.953 11 +1.589 12 Porsche RS Spyder
10 3 19 LMP2 van der Steur/ Devlin/ Greaves 1:15.968 120.366 13 +3.187 14 Radical SR9/AER
11 4 27 LMP2 Lienhard/ Theys/ van de Poele 1:17.210 118.430 15 +4.429 16 Lola R05/40 / Judd
12 1 009 LMGT1 Sarrazin/ Lamy 1:18.659 116.249 9 +5.878 11 Aston Martin DBR9
13 2 007 LMGT1 Enge/ Turner 1:19.107 115.590 10 +6.326 18 Aston Martin DBR9
14 3 3 LMGT1 Fellows/ O'Connell/ Papis 1:19.340 115.251 11 +6.559 12 Corvette C6-R
15 4 4 LMGT1 Gavin/ Beretta/ Magnussen 1:19.717 114.706 10 +6.936 14 Corvette C6-R
16 5 8 LMP2 Bach/ Cosmo/ Forbes-Robinson 1:20.439 113.676 11 +7.658 16 Courage C-65/Mazda
17 8 12 LMP1 Lewis/ McMurry/ Willman 1:20.679 113.338 8 +7.898 11 Lola EX257/AER
18 1 31 LMGT2 J Bergmeister/ Jonsson/ Long 1:23.652 109.310 7 +10.871 16 Porsche 911 GT3 RSR
19 2 62 LMGT2 Ortelli/ Kelleners/ Palttala 1:23.759 109.170 15 +10.978 17 Ferrari 430 GT Berlinetta
20 3 51 LMGT2 Jeannette/ Milner/ Lally 1:24.004 108.852 14 +11.223 15 Panoz Esperante GTLM/Ford
21 4 61 LMGT2 Lazzaro/ Mediani/ Franchitti 1:24.143 108.672 13 +11.362 14 Ferrari 430 GT Berlinetta
22 5 50 LMGT2 Maxwell/ Brabham/ Bourdais 1:24.433 108.299 5 +11.652 8 Panoz Esperante GTLM/Ford
23 6 44 LMGT2 Pechnik/ Neiman/ Law 1:24.447 108.281 10 +11.666 14 Porsche 911 GT3 RSR
24 7 23 LMGT2 Farnbacher/ Tiemann/ Liddell 1:24.681 107.982 7 +11.900 18 Porsche 911 GT3 RSR
25 8 21 LMGT2 Auberlen/ Hand/ Said 1:25.209 107.313 6 +12.428 17 BMW E46 M3
26 9 22 LMGT2 Marks/ Sellers/ James 1:25.714 106.680 6 +12.933 14 BMW E46 M3
27 10 45 LMGT2 van Overbeek/ Lieb/ Henzler 1:28.581 103.228 2 +15.800 7 Porsche 911 GT3 RSR
28 6 37 LMP2 C.Field/ Halliday/J.Field -.--- - 0 - 0 Lola B05 40/AER



-Bern

rotarygod

They need to allow the rotary to run unrestricted. I still don't think they would be running up with the others but they could do better. Of course if this happened and they won even one race, they'd restrict it again. The 3 rotor in it's naturally aspirated form just isn't capable of making enough power. Of course if they could get a car down to minimum weight that would help too. All of these negatives and I still love the car! Even if I do have a way of pissing those guys off! I can't wait to see what they've got up their sleeves for next year.

Renesis_8

Taken from Mulsanne's Corner "Porsche RS Spyder updated! Looking much more purposeful, the RS Spyder has been substantially reworked. Claiming improvements in aerodynamic efficiency through optimization of the rear wing and diffuser as well as improved cooling, in addition to 23 more hp (now up to a claimed 503 hp), Porsche is clearly preparing for Acura. Upgrades to the gearbox will allow for faster shifts and at the same time improve reliability. With this redevelopment of the RS Spyder Porsche has kept reduced cost as a design goal in light of future customer programs."

503hp.. probably more than that in the real car... Theres no way the NA 3-rotor can put out that much hp, even unrestricted
________
Prilosec injury lawyer

bern

Well bascially they are running unrestricted and with a bigger fuel cell than the other P2 teams....

http://rotarynews.com/node/view/658

from that post:


-Bern

rotarygod

The LeMans 787B's R26B 4 rotor engine in it's unrestricted form produced right around 700 hp or so. If we could keep the efficency as high and just subtract a rotor from that, we'd get roughly 525 hp for a 3 rotor. Unfortunately it doesn't work quite that way but it could be fairly close to that. The 4 rotor had a straight variable length intake manifold, ceramic coatings (which the Courage engine may or may not have), and a 3rd spark plug per rotor. It may not seem like much but that 3rd plug was good for about 3% better power and economy. On a 500 hp engine that is only 15 more hp but every little bit helps in a race car. If the car is still 175 lbs overweight as it pretty much has been since it's debut, that's hurting them too. I'm still willing to bet that fully unrestricted and as light as the rules allow won't make it the fastest car on the track but it will probably at least make it competitive.

bern

Full story on the new '07 Porsche

http://www.americanlemans.com/news/Article.aspx?ID=2559


-Bern

rotarygod

Bernie we posted at the same time.

I still find it pretty hard to believe that a restrictor plate that's only 2 1/8" in diameter isn't a restriction on a 3 rotor. Especially on a peripheral port which is very sensitive to restrictions. I wonder what the story is behind that?

bern

You'll need to speak to Dennis on that statement, and the whys? In my discussions and experience with some of the top 3-rotor builders/racers, I have never heard a quote of +450hp for a 3-rotor N/A motor. You also have to consider that most of the piston motors are surely not only out horsepowering the 3-rotor, but out torquing it also. Although a 20B n/a can make decent torque, I still think the V8s and turbos have them covered.

-Bern

Renesis_8

So a 100hp and 175lbs disadvantage would translate into 6secs behind the porsche per lap? is that a lot or sounds in range?
________
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rotarygod

It looks like we need a 4 rotor!

bern

or a very well tuned and developed 2-rotor turbo race motor, which is allowed per the ALMS rules!!

-Bern

Renesis_8

Maybe they'll put a REAL renesis in there with that setup.. haha, I doubt that tho, how about a supercharged 2-rotor?
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LupeFuentes cam

rotarygod

That I would agree with completely! Bernie, are you giving away secrets again?

bern

Nope... just a wish that Mazda would pursue this option. A 500hp 13B turbo is doable and can be made to run reliably with some exotic materials and new turbo technologies. So you know, Abel made a dyno run one time at over +980 RWHP with his 13B drag motor.

-Bern

rotary crazy

980 rwhp are you kiding me? thats got ot be a record or something?

I think a well develop 13b turbo can make 450 rwhp without beeng to strees out, it may not be as relyable as the 3 rotor but that can be change.

as it is today the only way the car can win is if all the others break down.

CONGRATULATE ME I JUST BECAME THE OWER OF A 2005 RX-8!

IT WAS ABOUT TIME

Tirminyl

I have 900hp in my head for this motor...maybe it was on a higher redline.

rotary crazy

as I remember a mazda engineer that work on the car said that if they rev the car over 10,000 rpm the car could make 900 hp, but for relaibility it was keep at a lower rpm range

Tirminyl

Yep that was it. My memory was a little foggy.

Oh and congrats on your new 8!

rotary crazy

chek it out https://www.rx8club.com/rx-8-discussion-3/about-time-just-bought-rx-8-a-99946/

rotary crazy

1:19.485 in todays practice, some improvement there

rotarygod

I don't see why it couldn't be done. If Mazda could make a 4 rotor do 700 hp and as others mentioned, more with a higher redline, and Xtreme Rotaries in New Zealand (or was it Australia?) could get a 2 rotor bridgeport up to 380 hp (at 10,000 rpm!!!!), I don't see why the 450-500 mark couldn't be achieved in a 3 rotor. It should be possible.

I do agree though that it needs more midrange torque and a turbo would definitely take care of that.

rotarygod

How much did everyone else improve?

simontemplar09

Looks like everyone else improved as well...

http://www.imsaracing.net/2006/event...20Practice.pdf

rotary crazy

about the same

bern

Hey where did you see this? I'd love to get a little more info on this set-up. I also think Rohan is spinning those bad boys to almost 12k rpm. Did you see a dyno chart, I'd love to see the power/tq curve?

-Bern