Results 205 to 221 of 245
Thread: Engine Modification
07-22-2005, 04:08 AM #205
Also there are differences in the way each country measures hp or bhp. The Americans use SAE, the Europeans ISO, the Japs JIS, and the Germans perhaps DIN. The only good and credible hp or bhp rating is when both cars are done by the same testing outfit.
Cooler's way is what marketers love to do. Beware consumers.
07-22-2005, 04:14 AM #206Originally Posted by Neil Nicholls
yes, there are differences but the differences seem to favor the agile lotus elite: eg manual transmission, lower center of gravity, racing tires, stiffer suspension, better front/rear weight balance BUT THE SOCCER MOM SUV STILL WIN IN 0-60MPH TIME
Last edited by cooler; 07-22-2005 at 04:26 AM.
07-22-2005, 04:18 AM #207Originally Posted by taneepak
07-22-2005, 04:35 AM #208Originally Posted by Pete LSD
07-22-2005, 08:57 PM #209
Wow, quite an extensive re-work of the engine! Did they put in forged aluminum pistons? What's the final compression ratio (12.50:1.00)? Did you add octane booster (more toulene) to premium gas? And wouldn't 4-1 exhaust robs you of torque and pickup at low to medium rpm? And what's vibration like compared to orginal?
Originally Posted by glencomienda111
Last edited by Pete LSD; 07-22-2005 at 08:59 PM.
07-29-2005, 04:32 AM #210Originally Posted by Pete LSD
08-01-2006, 06:21 AM #211
Guys, check this out: http://en.wikipedia.org/wiki/Audi_R10
The main novelty of the R10 is its engine: a TDI Turbo Diesel engine, running on Shell V-Power Diesel. It is a 5.5 L (335.6 ci) all-aluminium bi-turbo 90° V12, with common rail direct injection of more than 1600 bar. Its output should be 650 hp (485 kW) (regulated) and 1100 N·m (811 ft·lbf) of torque, and its usable power band is between 3000 and 5000 rpm. Its benefits are a broad range of usable power, high torque and economy. Two Garrett turbochargers limited by the regulations to 2.94 bar absolute breathe through two 39.9 mm intake air restrictors. It uses the latest Bosch Motronic (MS14) management, 1600 bar piezo injectors, and makes a low noise for a race car.
It will be difficult for Audi to overcome the weight of this engine. The latest Audi TDI 3.0 L (183 ci) V6 weighs 220 kg (485 lb) and the 4.2 L V8 255 kg (256.2 ci, 562 lb) but their blocks are made of CGI iron. The V12 is rumoured to weigh upwards of 200 kgs, Audi engineers admit that the weight per cylinder is the same as the precededing 3.6-litre FSI V8 of the Audi R8. The wheelbase has been increased over the R8 to 2980 mm to account for this. This is unfavorable against the 130 kg (287 lb) of a concurrent Judd V10, and even the 180 kg of the Ricardo turbodiesel prototype based on it.
Audi's decision to use a diesel engine emphasizes the commercial success of TDI (and its competitors) on Europe's roads. It isn't however, the first diesel to be raced at Le Mans. In 2004 a Lola equipped with a Caterpillar re-badged VW V10 TDI ran for a few hours before breaking its gearbox. Peugeot will compete with its new diesel effort in 2007 in its 908
The Le Mans-winning Audi R10 TDI is a thoroughbred race car from the wheels up, and a direct descendant of the all-conquering R8 that won five Le Mans, six Sebring 12-hour races and a catalogue of American Le Mans Series (ALMS) titles. But it isn't a race car with a diesel engine; it's a diesel race car—designed from a clean sheet of paper around an engine that's designed purely for racing. So while there have been diesel race cars before—even at Indy—and even production-based diesel race winners, there has never been a purpose-built diesel-powered race car as focused and advanced as this one.
It's turbocharged 5.5-liter four-cam V12 engine makes more than 650 horsepower and 840 lb-ft of torque, and that's enough to give it a top speed of more than 200 mph on a circuit like Le Mans. And in March, against serious opposition including the race-winning Porsche prototypes from ALMS, it proved it has what it takes by winning its first time out, at Sebring. But make no mistake, this was a mission, not just motor racing—and even for the purposes of making America take notice, Sebring was just the appetizer. Le Mans is the always going to be the main meal.
Special deisel fuel: crude diesel mixed with liquified natural gas converted to diesel
More about synthetic diesel
Last edited by Pete LSD; 08-01-2006 at 06:26 AM.
08-01-2006, 01:55 PM #212
Maybe disel is the fuel of the future . I read an article about a Disel powered car that sprayed a mixture of urea in the exhaust that reduced 80% of the emissions and got rid of the awful diesel burning smell. Its just a concept car right now. I think mercedes, ill see if i can find the article.
08-01-2006, 02:19 PM #213
The urea is a reduction agent to breakdown the NOx in the catalyst. Diesel is really the stepping stone to hydrogen fuel cell.
The VW Golf or Jetta TDI can easily travel from Calgary to Vancouver on one tank of diesel. Try that with gasoline engines.
Originally Posted by Eurasian =--(O)
09-25-2006, 01:28 AM #214
Honda unveils diesel system to rival gasoline cars By Chang-Ran Kim, Asia auto correspondent
2 hours, 6 minutes ago
HAGA-GUN, Japan (Reuters) - Honda Motor Co. (7267.T) said on Monday it has developed a new and simple diesel powertrain that is as clean as gasoline-fuelled cars, unveiling plans to mount it on a car for the U.S. market by 2009.
Diesel engines, which now power half of Europe's new cars, are slowly gaining traction with fuel-conscious consumers around the world since they typically get 30 percent better mileage than gasoline cars.
Their weakness has been the higher exhaust levels of nitrogen oxide (NOx), a greenhouse gas, and carmakers are racing to come up with ways to clear the world's strictest emissions regulations, which the United States will usher in next year.
Honda's new diesel drivetrain generates and stores ammonia within a two-layer catalytic converter to turn nitrogen oxide into harmless nitrogen.
Honda engineers said the technology is superior to a process pioneered by Germany's DaimlerChrysler AG (DCXGn.DE) because the latter requires a complex system and heavy add-ons to generate ammonia from urea-based additives.
Some technical hurdles remain.
The system would need fine-tuning for the wide-ranging cetane indexes of diesel fuel found in the United States. Honda also needs to develop technology to measure emissions levels according to U.S. On-Board Diagnostic System requirements.
But Japan's third-biggest auto maker said it planned to roll out the advanced diesel engine, first in the United States within three years and later to other regions. DaimlerChrysler, which along with Volkswagen AG (VOWG.DE) already sells diesel cars in the world's biggest auto market, is preparing its next-generation diesel car for a 2008 launch.
Honda has long been at the forefront of green powertrain technology, perhaps most famously with the development in 1973 of the CVCC (Compound Vortex Controlled Combustion) engine which gave the popular Civic its name. The engine was the first to meet U.S. clean air guidelines without a catalytic converter.
"Just as we paved the way for cleaner gasoline engines, we will take the leadership in the progress of diesel engines," Honda Chief Executive Takeo Fukui told a news conference.
Honda would be "open to considering" licensing its new diesel technology once it was perfected, Fukui said.
FUEL CELLS, FLEX-FUEL
In a demonstration of other new power plant technologies at its R&D center in Tochigi, north of Tokyo, Honda also showed off a prototype of its next-generation fuel cell vehicle which runs on a newly developed compact and more powerful fuel cell stack.
The new stack is designed to allow the hydrogen and water formed during electricity generation to flow vertically instead of horizontally, making the component 20 percent smaller and 30 percent lighter than the previous version.
Honda's new FCX fuel-cell car now has a driving range of 570 km (354 miles) -- a 30 percent improvement from the 2005 model. Its maximum speed is 160 km (100 miles) per hour, and it can be driven in temperatures as low as minus 30 degrees Celsius (-22F).
Honda plans to begin marketing the car in limited numbers in 2008 in Japan and the United States.
Honda said it also developed a flexible fuel vehicle system that can operate on any proportion of ethanol to gasoline between 20 percent and 100 percent. That car will be sold in Brazil, the biggest market for ethanol-based vehicles, later this year.
"Way out in the future, the ultimate green car will be fuel cell vehicles," Fukui said. "But in the meantime, you need a wide range of green technology to meet varying local needs and fuel supply."
1. new diesel engine
2. new fuel cell
3. new fuel cell car
Last edited by cooler; 09-25-2006 at 01:33 AM.
07-04-2007, 12:37 AM #215
07-12-2007, 07:43 PM #216
Is it possible to run a turbocharged directed-injected gasoline engine at stoichiometric ratio or lean without detonation/knock? Emission is not a consideration . Water and methanol injection are not allowed.
07-17-2007, 05:44 AM #217
I don't think so.
Simply speaking, you have to raise the amount of fuel that goes into the engine. A turbo by definition compresses air, ergo introducing a lot more of it than normal. Air/fuel ratio is everything for aftermarket turbos.
That said, there are some carmakers that can still manage to keep the compression ratio high with turbo applications...
07-17-2007, 05:48 AM #218
07-17-2007, 06:05 AM #219
I just saw something that might interest you...found this on Car and Driver's road test of the Cadillac STS V6.
"This latest V-6 is indeed a gem. Significant among its attributes is direct fuel injection, which squirts the fuel into the combustion chamber rather than the intake track. That’s not new technology, but direct injection is gaining in popularity because when the fuel is introduced into the cylinder, there’s a cooling effect that increases charge density and reduces the tendency for harmful detonation. This allows designers to raise the compression ratio for better efficiency and more power."
Albeit naturally aspirated, this is interesting...so it seems direct injection might help your cause after all!
08-10-2007, 10:21 PM #220
Is this a rip off?
12-12-2007, 06:05 PM #221
It has already been confirmed that Honda is going to replace its slow selling Accord Hybrid V6 with a new diesel powered Accord in 2009. The new engine will be based on Honda's 2.2L i-CTDi engine. Honda claims that the new Accord Diesel will be able to achieve over 60 mpg.
A European Accord that was fitted with the 2.2L diesel was capable of achieving 62.8mpg.
That means that the US version of the car should achieve around 52 mpg.
The new engine will meet the new emissions standards in the US and will run as cleanly as regular gas engines. The diesel engine uses a catalytic converter that reduces the nitrogen oxide output by converting it to ammonia. The ammonia is then used to further neutralize the remaining NOx.
it seem car makers are diesel craze now.
By bobbinbette in forum GripReplies: 4: 10-03-2008, 12:56 PM
By kwun in forum Badminton Central AnnouncementsReplies: 13: 06-04-2007, 05:19 PM
By B3nny H4nn4 in forum Chit-ChatReplies: 0: 03-09-2007, 01:18 AM
By Pecheur in forum Forum FeedbackReplies: 3: 09-10-2004, 04:12 AM
By Pete LSD in forum Chit-ChatReplies: 4: 01-07-2004, 01:25 AM