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22 Dec 2017, 21:34 (Ref:3788759) | #1501 | ||
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Flis's SoD Racing will put a new Cadillac DPi-V.R on the grid with T. Vautier and Matt McMurry piloting it. ...
http://www.racer.com/imsa/item/14642...lac-dpi-effort L.P. |
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22 Dec 2017, 23:23 (Ref:3788772) | #1502 | ||
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It can, and it(partially) was. By limiting things in the gearbox it doesn't take away the torque, but it limits their ability to use it. I forget the specifics, but one of the rounds of BoP did alter the Caddilac gearbox specifically to tackle the torque advantage, and it was indeed at that point that things started looking far more balanced.
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22 Dec 2017, 23:24 (Ref:3788773) | #1503 | ||
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23 Dec 2017, 01:18 (Ref:3788790) | #1504 | |
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Joel Miller first driver announced in the Bar1 car
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23 Dec 2017, 09:20 (Ref:3788810) | #1505 | ||
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I explain better what I mean for "bop can't kill torque". In a turbo engine can be decreased or increased the torque release just setting X turbo boost at X rpm; this way, you can basically design the torque curve you wish. In a NA you can use air restrictors, but you just will obtain a torque reduction at high-end rpm. Low-mid rpm torque release will remain almost untouched. That's what I mean for "bop can't kill torque". That's why to me NA max displacement should be set to 5.5L. This way torque release should be in the 650Nm range, like nissan and HPD V6 motors. |
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23 Dec 2017, 12:05 (Ref:3788834) | #1506 | ||||||
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Prior to the gearing change, IMSA was taking MASSIVE(comparatively) swings at the Caddys. After it, they were rather tiny. Quote:
GM knows what they're doing with V8s. Last edited by FormulaFox; 23 Dec 2017 at 12:13. |
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23 Dec 2017, 12:48 (Ref:3788838) | #1507 | |
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I know that c7r can push over 700Nm, but is an extremely tuned racing engine made to copy the katech ls7r concept = insane torque release to achieve max power as soon as possible, indeed the engine revs up to just 6500rpm.
In its roots is almost a bespoke engine. Cadillac dpi is a ECR tuned version of the road LT1, that share more parts with the street motor. According to some sources of mine, corvete DP 5.5 (LS9 derivated) was pushing 540-560hp (according to restrictors size) at about 7000rpm revving up to 7500rpm with a torque release of about 640Nm. With larger restrictors to get 20-30hp more, it would be a quite balanced engine compared to the huge 6.2L. No more need of extra ballast, smaller fuel tank, mandatory low DF rear wing and mandatory gears ratios. |
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23 Dec 2017, 19:41 (Ref:3788873) | #1508 | |||
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Quote:
The old DP engine was not 5.5 liters, it was 5 liters. |
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23 Dec 2017, 20:41 (Ref:3788887) | #1509 | |
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Maybe am I wrong, and correct me if I am.
Corvette 5.5L history is this: In 2009 corvette racing switched to GT2 after le mans, katech destroked the LS7R to 6L allowing the car to score points in ALMS. In 2010 GM dropped katech as engine tuner/supplier and designed in house a new 5.5L engine to suit FIA/ACO GTE/GT2 tech rules. It's still based on the road LS7 but extremely tuned to work as a dyno like katech ls7r was. Season by season GM kept on developing and evolving this engine. In late 2013 they added fuel DI because new road LT1 engine was equipped, so it could be equipped in the racing engine too. That's the reason I wrote that corvette C7R is an "almost" bespoke engine, because is some kind of stand alone platform. No matter what new kind of engine series a road corvette may be powered, C7R will keep on using the 5.5L base. You're wrong about corvette DP. 2012-2013 corvette DP engine was a 5L (mandatory displacement for V8 in grand-am. Ford R&Y V8, BMW dinan V8, Porsche cayenne derived V8, GM V8 were all 5L because of rules) 2014-2016 corvette DP engine was updated by ECR and enlarged to 5.5L |
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23 Dec 2017, 20:57 (Ref:3788891) | #1510 | |||
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I had assumed you meant the OLD one because, well updated engine had FAR more torque than you seem to think. It was an absolute beast, which is why it so consistently outran the LMP2s. |
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23 Dec 2017, 21:18 (Ref:3788893) | #1511 | |
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More torque than nissan-zytek VK45 for sure; but "boost boosted" HPD 2.8 and the larger 3.5 V6 (basically the same engine that arx05 will use next season) ligiers were in the same torque range.
Nissan LMP2 V8 was in the range of 540Nm and 500-520hp @7000rpm. Pre 2014 Grand Am 5L V8 were almost spec engines with torque and power figures more or less equalized by bop. Something like 580-600Nm and 500-520hp somewhere between 7000 and 7500rpm. According to my most recent sources: Corvette DP 5.5L in 2014 had about 560hp@about 7000rpm with 640Nm torque range. Power was nerfed in next 2 seasons to about 540hp in 2016. Ford V6 3.5L was in the range of 550hp @ about 7300rpm (it could rev up to almost 8000rpm) but had less torque than corvette DP, 600-620Nm torque range. Even if because of bop restrictors size decrease, very likely cadillac dpi can't reach 600hp, I can't expect nothing less than 700Nm from that 6.2L. A torque amount unachievable for any other kind of engine, most of Nm already available at lowest rpm. Repeat, to me max displacement for NA should be to set to 5.5L, but is just my opinion. |
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24 Dec 2017, 02:10 (Ref:3788926) | #1512 | ||||
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24 Dec 2017, 04:03 (Ref:3788935) | #1513 | ||
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I think it was a good choice. Miller have what the team needs, experience with the car. He showed some moments of speed, but we know he isn't one of the fastest. Good for him to be able to show what he can with the updated car.
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24 Dec 2017, 16:57 (Ref:3789031) | #1514 | |
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There's change in the Jackie Chan DC Racing second car, previously announced Thomas Laurent is out, Antonio Felix da Costa & Ferdinand Habsburg are in.
Perhaps a sign Thomas Laurent is definitely out of DC and in with Rebellion for the WEC season Sent from my iPhone using Tapatalk |
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24 Dec 2017, 20:26 (Ref:3789063) | #1515 | |
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http://sportscar365.com/imsa/iwsc/da...p-for-daytona/
Wow. Royalty is literally coming to the Daytona 24. Ferdinand is a direct heir to the Austrian throne and the famous Hapsburg dynasty which is very much alive still. |
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24 Dec 2017, 20:39 (Ref:3789065) | #1516 | |||
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27 Dec 2017, 19:07 (Ref:3789356) | #1517 | ||
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Wright Motorsports driver line up for Daytona.
- Patrick Long - Christina Nielsen - Mathieu Jaminet - Robert Renauer There's also the Manthey Racing Porsche on the Roar Before 24 entry list. - Steve Smith - Harald Proczyk - Sven Muller - Matteo Cairoli - TBD |
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JWA : Manthey Racing : Proton Competition |
27 Dec 2017, 20:05 (Ref:3789359) | #1518 | ||
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27 Dec 2017, 20:16 (Ref:3789362) | #1519 | ||
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Paul Dalla Lana, Pedro Lamy, Mathias Lauda and Daniel Serra in a Spirit Of Race/AF Corse 488.
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JWA : Manthey Racing : Proton Competition |
27 Dec 2017, 20:26 (Ref:3789363) | #1520 | |
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Guess that's the sign no Dalla Lana paid Astons for IMSA. Can't fault him for not paying the pay-to-play price when someone else will pay for Ferraris to run. Or have they dropped the 'marketing fees' charge for 2018?
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27 Dec 2017, 20:27 (Ref:3789364) | #1521 | |
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are BAR1, performanche tech, AFS/PR1 and CORE full season or just NAEC?
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27 Dec 2017, 21:22 (Ref:3789373) | #1522 | ||
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28 Dec 2017, 03:04 (Ref:3789391) | #1523 | ||
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I was scrolling through my channel listing last night and noticed that I now have Fox Sports 2 on my listing (ch. 923), I am an Xfinity Customer. Now I can watch IMSA properly on TV whenever they decide to go channel hopping (which will be a lot this year as it turns out).
Can anyone else with Xfinity confirm that they now have FS2? I am pretty sure Comcast was the only major cable provider left that didn't carry that channel. |
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28 Dec 2017, 04:28 (Ref:3789397) | #1524 | ||
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28 Dec 2017, 13:38 (Ref:3789448) | #1525 | ||
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