|
||||||||||
|
||||||||||
22 Jul 2010, 20:45 (Ref:2730832) | #151 | ||
Veteran
Join Date: Mar 2008
Posts: 889
|
Quote:
I can be annoying sometimes, which i apologize... but i prefer to be like the illiterate peasant kid that asks " why is the emperor naked" in Anderson tale of "The emperor new clothes"... than any other way. Last edited by hcl123; 22 Jul 2010 at 20:58. |
||
|
22 Jul 2010, 22:42 (Ref:2730900) | #152 | |||
Veteran
Join Date: Dec 2006
Posts: 8,829
|
Quote:
Look at the old Ford based pushrod 6.0 V8 that Panoz used and the 6.0 V12 that BMW used. The Ford/Elan V8, by your logic had 4 strokes/rpm vs the 6 strokes/rpm of the V12. However, the Ford V8 made as much if not more power, and had more torque. And that with a heavy crossplane crank compared to the V12's crank, let alone the flatplane crank the Audi 3.6 turbo V8 used. The Ford's biggest failing was that it got relatively poor fuel mileage, while the Audi V8's big advantage was turbocharging, which meant that the 3.6 V8 had to rev to 6250 rpm to make 600+ hp, and normally redlined at 7000rpm, like the Ford V8 and the BMW V12, and got better fuel mileage, especially when the FSI direct injection system was used, which boosted power and torque as well, and essentally got rid of any low rpm turbo lag the Audi engine had. The Audi and Peugeot engines, be it the Audi and Pug V12s and or the Audi V10 are all 5.5 liters, and all are easily making 680-700hp, if not more, and are making close to 900ft/lbs(1200nm) of torque, if not more. Audi went to the V10 from a V12 with the R15 because the engine was about 4-5 inches shorter and weighted 50 or so pounds less, and helped give the R15 better weight distribution compared to the R10 or the 908. So I don't see powerwise where Audi has given anything up-if anything, they've gained over the R10's V12, as at Paul Ricard the R15 had no trouble keeping up with(and at times out running) the Oreca 908 down the Mistral straight(while having similar or somewhat superior cornering) and had better straightline speed at Spa(though the LM areo setup probably helped in that area). The only thing I'd have against Audi going the V6 route is that not counting the various incarnations of the Porsche Boxer 6, V6s haven't had much success at Le Mans-the WM's Peugeot branded PRV V6s were either underpowered or were handgrenades. Hopefully Audi won't go the V6 route for that reason, and if they do, I hope they know what they're doing. |
|||
|
22 Jul 2010, 23:05 (Ref:2730910) | #153 | ||||
Veteran
Join Date: Mar 2004
Posts: 8,738
|
Quote:
Quote:
In fact David Floury of Oreca already made the following comment: Quote:
|
||||
|
22 Jul 2010, 23:21 (Ref:2730915) | #154 | ||
Veteran
Join Date: Mar 2004
Posts: 8,738
|
Quote:
|
||
|
22 Jul 2010, 23:43 (Ref:2730919) | #155 | ||
Veteran
Join Date: Dec 2006
Posts: 8,829
|
Sadly, that engine DNF'd at Le Mans even after being bumped up to 3.6 liters. V6's haven't done well, and it seems that you need at least a V8 to do well at Le Mans, especially in an LMP1.
|
||
|
23 Jul 2010, 06:25 (Ref:2731008) | #156 | |||
Veteran
Join Date: Jan 2010
Posts: 6,269
|
Quote:
I'm pretty sure that whatever engine they pick, they'll darn well know what they're doing; you've got a few geniuses of engineering in the engine design team at Audi, WM/WR is/was just a small private team. |
|||
__________________
When in doubt? C4. |
23 Jul 2010, 11:56 (Ref:2731114) | #157 | ||
Veteran
Join Date: Sep 2007
Posts: 620
|
|||
|
24 Jul 2010, 02:41 (Ref:2731564) | #158 | ||
Veteran
Join Date: Mar 2008
Posts: 889
|
Quote:
What i was comparing was Audi to Peugeot, they have the same displacement... then, when you have more power strokes for each rev of the crankshaft, there is a tremendous amount of chance that you can get more torque, than an engine that has the same displacement but less power stokes per rev. |
||
|
24 Jul 2010, 03:36 (Ref:2731568) | #159 | ||||
Veteran
Join Date: Mar 2008
Posts: 889
|
Quote:
Quote:
If its possible during the brake before a corner/curve, but no during a corner/curve, is it when the driving wheel turns it gets the recovery system shut off ?? ... or how are they going to impose this ?? ... what about when a driver quick changes lane, because of retards and has to brake ?? ... what else ?? To me it seems that they should abolish hybrids, because if recovery is not allowed during braking for corner/curves, it eliminates the most single more efficient way of energy recuperation. It seems that they don't want hybrids... CLEARLY... ANOTHER PROPAGANDA... a mental diarrhea... 1) any kind of energy recovery is allowed etc ( the mantra) 2) Only store electric and mechanical( leaves out the most efficient of all - hydraulic)... so they don't want hydraulic, transporting to our streets hydro-mechanical IVT transmissions and ~20% fuel saving in day by day 3) NO efficient way of energy recuperation is allowed...that is, nothing during braking... for corner/curves ???... but why in the hell would anyone brake in a race if not for a corner/curve !?... so no brake recuperation. Someone please post the insults.. thank you! Quote:
After considering all this, i wouldn't be surprised if Audi R18 has no hybrid system at all, but has 4WD... hybrid is marketing only... pure marketose... with this rules. Last edited by hcl123; 24 Jul 2010 at 03:51. |
||||
|
24 Jul 2010, 05:35 (Ref:2731583) | #160 | |
Veteran
Join Date: Mar 2005
Posts: 11,479
|
No, I think you just have no clue what you are babbling about. The post you referenced said energy recovery would be allowed from the braking into the corners, otherwise what would be the point of having a hybrid system? As for the release, it sounded like the rules are free as long as the energy is used only in addition to the natural acceleration of the car with the throttle, no push-to-pass buttons. Although I'm not sure how that would work for the electric drive down pitlane that every seems to think teams want, guess under a certain speed a button could be used similar to pitlane limiter and braking into pitlane would help top off the system.
As for ABS for a TC system, isn't ABS as a whole outlawed in most series?? Seems like it, guys wouldn't be sliding off the track with the wheels locked if they had ABS onboard. |
|
|
24 Jul 2010, 08:11 (Ref:2731607) | #161 | ||||||
Veteran
Join Date: Mar 2004
Posts: 8,738
|
Quote:
The LMP rules don't allow "electronic controllable differentials" (see rule 9.3.1). This is not F1. Quote:
Quote:
Quote:
Quote:
You completely lost me. The only way to achieve 4WD will be to use a hybrid system Like Porsche does with the hybrid 911. |
||||||
|
24 Jul 2010, 08:16 (Ref:2731608) | #162 | |
Racer
Join Date: Dec 2008
Posts: 406
|
[QUOTE=hcl123;2731568]bad rules...really... "fait divers" to justify doing nothing... traction control already happens to an extent with electronic controllable differentials... ABS actually many pilots don't like them because they tend to lengthen brake distances, tires have so much grip that is preferable to leave a mark in the tarmac... the engine always brake, unless you clutch them ofline anytime the foot gets off the accelerator.
Sorry no insults as you requested, but are you talking about Sportscar in current era? ABS was banned after 1998 when Porsche had it....and won Le Mans, Toyota and others were also working on their systems as it was faster, had more tyre management control and had less chance of driver mistakes when it was banned. If it was allowed LMP1's would have ABS, as would F1 or any other category of racing. Electronically Controlled Differentials are illegal but traction control is, and has been allowed widely used since 2006. Also previously banned for 1999. 4WD could be a good innovation???? It has been in motorsport for over 30 years!! Where is innovation in that? |
|
|
24 Jul 2010, 16:53 (Ref:2731735) | #163 | ||
Veteran
Join Date: Mar 2008
Posts: 889
|
Quote:
"dans les courbes" means inside the curves/corners... how in the hell are they going to manage that, and impose the rule... that is what i'm babbling about. A technical solution all mechanical ?? ... electronic??... if restrictions go drakonian its equivalent of stopping brake recovery, many curves most of braking time its done already inside of it, specially the medium ones... some curves, the fast ones, some braking is done already inside the curve, there is a lot of situations when this happens, leading to a considerable waste of energy recovery possibilities, making the efficiency of the hybrid system to go down and the cost of implementing the restrictions go very high. Don't worry about push to pass buttons, if recovery is deficient, there will only be enough juice to help in the first phases of acceleration for circuits like lemans. If they wanted an electric hybrid solution to fail... as long as there are suckers to take on the costs... only for the marketing of being "green"... this is a perfect rule for that. That is why i say... i never heard of "rumors" about Audi testing an hybrid solution, and they don't have it in any commercial car if i'm not mistaken. So counting on the lax of rules to allow the continuation of 2010 type cars, its very possible that Audi R18 doesn't present an hybrid solution per se... maybe heat recuperation to pre-heat the fuel, and exhaust pressure to drive small generators to mainly(help?) power all engine auxiliaries by electric motors; water, oil and fuel pumps... The electric/electronic control of those functions would make more easy to implement a real HCCI mode for the engine... and that could be a very good advantage already. |
||
|
24 Jul 2010, 17:09 (Ref:2731742) | #164 | ||
Veteran
Join Date: Mar 2008
Posts: 889
|
Quote:
|
||
|
24 Jul 2010, 18:31 (Ref:2731802) | #165 | ||
Veteran
Join Date: Sep 2008
Posts: 944
|
I'm an engineer for Cummins, so I like the diesel combustion discussion.
Last edited by Flyin Ryan; 24 Jul 2010 at 18:54. |
||
|
25 Jul 2010, 15:58 (Ref:2732482) | #166 | ||
Veteran
Join Date: Mar 2004
Posts: 8,738
|
Quote:
The only way to implement 4WD next year is to adopt the system that Porsche uses in the hybrid 911: electric motors drive the front wheels with electric energy recovered during braking and combustion engine drives rear wheels. |
||
|
25 Jul 2010, 20:05 (Ref:2732758) | #167 | |
Veteran
Join Date: Mar 2008
Posts: 889
|
Well my drive is that i believe rules are not set in stone yet. And if they are, they can always change, at least they have been changing in the middle of last seasons, to put more weight and diminish the air restrictors sizes of diesel engines... and to augment the restrictor sizes of petrol engines... a situation that anyone with at least a tiny little bit of justice sense can describe as fair. So why not 4WD if someone with influence asks hard ?
|
|
|
26 Jul 2010, 02:50 (Ref:2733040) | #168 | ||
Racer
Join Date: Nov 2003
Posts: 243
|
Think Audi 90s in Trans-Am and IMSA back in the 80's. I have to admit to being an Audi supporter (hell I own one), but the Quattro cars were just too damned good compared to the RWD competition. Hence, they were banned. I'm afraid that Audi with their EXTENSIVE AWD knowledge, based on decades of building and racing AWD cars, would destroy the competition. I mean, damn, an R18 TDI Quattro, really?
|
||
|
26 Jul 2010, 05:50 (Ref:2733085) | #169 | ||
Racer
Join Date: Dec 2008
Posts: 406
|
Quote:
|
||
|
26 Jul 2010, 16:54 (Ref:2733449) | #170 | ||
Veteran
Join Date: Dec 2006
Posts: 8,829
|
But would Audi want to make the R18 and AWD car with the KERS system? Or would Audi even run KERS on the R18?
Audi by 2007 or '08 got the R10 to where it needed ballast to run at 900kgs, even though it performed better at 925(like in the ALMS). Audi was able to get the R15 to the point where(like Acura) they had to run the car with a 150-200lbs of steel or tungsten in the nose to get it to 900kgs, let alone the 930kgs they they've had to run since Le Mans last year. Audi can easily make the R18 as light, but with the KERS, there's packaging issues, in that where will the 25-35+kgs that the KERS will bring be placed within the car? I can see the R18 if this happens having weight distribution similar to the Audi R10 or the Peugeot 908, both of which are rearward biased compared to the R15 and the old R8. |
||
|
26 Jul 2010, 21:54 (Ref:2733660) | #171 | |
Veteran
Join Date: Mar 2004
Posts: 8,738
|
The smaller engine will probably compensate for the extra weight of the hybrid system.
I wonder. If a hybrid system is used that powers the front wheels, it is possible to make a permanent 4WD by fitting a huge alternator. In that case the combustion engine can power the electric motor(s) of the front axle even is the KERS battery is empty... |
|
|
26 Jul 2010, 22:24 (Ref:2733678) | #172 | |||
Veteran
Join Date: Nov 2006
Posts: 8,919
|
Quote:
L.P. |
|||
__________________
Probae esti in segetem sunt deteriorem datae fruges, tamen ipsae suaptae enitent |
26 Jul 2010, 22:47 (Ref:2733689) | #173 | ||
Veteran
Join Date: Dec 2006
Posts: 8,829
|
But then again, maybe that's why Audi has built and even rallyed the E-Tron.
|
||
|
26 Jul 2010, 22:57 (Ref:2733694) | #174 | ||
Veteran
Join Date: Nov 2006
Posts: 8,919
|
|||
__________________
Probae esti in segetem sunt deteriorem datae fruges, tamen ipsae suaptae enitent |
27 Jul 2010, 03:07 (Ref:2733759) | #175 | |
Veteran
Join Date: May 2006
Posts: 1,623
|
Its obvious that the R18 will have some sort of kers or hybrid device and the puegeot 908 not.
the kers gives they the ability to power the fronts wheels. Audi is 4 wheel drive. thats what they do. Quattro. Also Audi is bulding a V6 while puegoet a V8. the loss of weight of two cylinders . audi can afford a battery pack or flywheel or whatever. actuallly maybe puegeot will have a hybrid now that i remember the 908HY |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[WEC] Porsche Prototype Discussion | Simmi | North American Racing | 9261 | 15 May 2024 15:22 |
[WEC] Toyota LMP1 Discussion | Gingers4Justice | ACO Regulated Series | 6771 | 18 Aug 2020 09:37 |
Nissan LMP1 Discussion | Gingers4Justice | Sportscar & GT Racing | 5568 | 17 Feb 2016 23:22 |
How about a LMP1 Pro & LMP1 Privateer class | Holt | Sportscar & GT Racing | 35 | 6 Jun 2012 13:44 |
[LM24 Race] Audi LMP1 Poster all art deco'd. | blackohio | ACO Regulated Series | 2 | 27 Oct 2011 06:30 |