Hello Haitham, here's a question on adding nitrous to a turbo setup.http://www.yellowbullet.com/forum/showthread.php?p=5831802
Monday, March 14, 2011
Saturday, March 12, 2011
Hennessey Venom GT Shows American Tuning Prowess To The World
The design brief was to produce the maximum power to weight ratio in a road-going car. And with the help of an engineering firm in England, Hennessey was able to achieve this goal, by having a car with 1G of acceleration in the lower gears. To achieve this performance, the tuner used a 6.2-liter Chevy V8 with twin Garrett turbos to produce 1200 horsepower and 1155 pounds-feet of torque. Locating this engine and a 6-speed transmission in an engine bay designed for a naturally-aspirated 4-cylinder took refabrication of the aluminum monocoque and the addition of a chromoly structure. Carbon-ceramic brakes from Brembo and KW adjustable suspension complete the major changes to the car. CFD enabled Hennessey to design and manage airflow for the engine and the car in the computer even before the first custom parts were built. Even with the Ricardo 6-speed and twin turbo V8, weight distribution is 44/56, so the car shouldn’t be as tail-happy as you would think. This makes the car live up to the handling prowess that Lotus is famous for.
The Venom GT weighs in at 2685 pounds, which is equivalent to a 2005 Ford Focus. Superlatives are not enough anymore to describe the performance of this car. Just content yourselves with the car’s performance, which is 0 to 60 mph in 2.5 seconds and a quarter-mile time of 9.9 seconds. Sprinting to 200 mph (which a lot of cars can’t even manage) can be done in a fraction under 16 seconds. A Bugatti Veyron needs about 24 seconds to do this. For now, only 10 or less cars will be built annually, at a price tag in today’s currency of $1 million per copy.
On the dyno
Preview video
Source article is here.
Thursday, March 10, 2011
4-Cyl Honda Integra Made History By Running 8-sec Quarter Mile
Honda turned the motorsports world on its ear when it introduced its VTEC engine technology. With specific outputs in the 100 hp per liter range, it rivaled the output of even forced-induction engines of the time.
This Integra combines a K-series engine (the original Integra Type R motor is a B18) with a Garrett turbo running a 72 mm inducer. This is a class limitation, with minimum vehicle weights of 2500 lbs. Needless to say, all the internals of the K-series motor used top-shelf parts to withstand the boost. Very little information on the engine can be found but with an 8.9 best, a 166 mph trap speed, and assuming a weight of 2600 lbs., engine output can be calculated to be over 1,000 horsepower.
But the tuning of this car was not limited to the engine. You can make a ton of power but it has to be usable. The owner, Tony Palo, says, “The most overlooked things I see are good engine management systems, good boost controllers, and suspension. There are a lot of cars out there that make the power on the dyno, but only a small portion of them that run what the dyno numbers say they should.”
When the team is at the track, Palo always looks at the data from the logger after a run and goes over the time slip. After looking at the plugs, the datalog, and the time slip, the team makes whatever changes they feel will make the car go quicker. The goal is to go faster every time the car goes down the strip.
See the source article here.
Tuesday, March 8, 2011
D1-prepped CT9 Evo Lancer Engineered To Win
With Mitsubishi hemming and hawing about the Lancer Evolution’s future, it’s only fitting that a feature on this legendary affordable supercar makes it to this blog. Although the Evo X is the most commonly known Lancer Evolution in the U.S. nowadays, the winning ways of the Evo, as it is known to the legions of its fans all over the world, actually began its winning ways with the Evo 3, when it was entered in the World Rally Championship to demonstrate its all-wheel drive capabilities. Since then, Evos have seen competition and success in dirt and paved surfaces. Even on the street, the sight of an Evo makes enthusiasts sit up and take notice because it is not a car to be trifled with, even it its stock 280 horsepower form.
One of the most unusual, and best engineered, competition Evos was the CT9 Evo of Team Orange, built for drifting by Jun Engineering of Japan. Despite its unassuming name, Jun is a very well-known and respected outfit and its products and workmanship are among the very best. For this build, the team decided to discard the AWD and transverse engine/transmission layout and instead convert the Evo 9 to a longitudinal front-engine/transmission layout.
Jun Engineering rebuilt the Mitsubishi 4G63 engine with a 2.2-liter stroker kit, specially developed for this application. Put together with other Jun internals, the engine is force-fed with a Trust TD06-25G turbo blowing 1.7 kg/cm of boost to produce an output of 540 reliable horsepower. In this cost-no-object build, a Hollinger 6-speed sequential transmission was fitted behind the engine, driving a Cusco limited-slip differential. DG-5 coilovers and the requisite competition brakes round out the other major components of the car. As befitting a proper competition car, the body was stripped and clad with lightweight panels to bring the car’s weight down to 1,250 kilos.
After various shakedowns and tuning, the car won the prestigious D1 drifting championship in the year it was entered in. Validation of such fine engineering work cannot have been done without a head for proper performance calculations and in this regard, Jun head Susumu Koyama is among the best.
Shakedown video:
With its Evo X teammate:
Source article here.
Sunday, March 6, 2011
HKS Drag Skyline Showed V8s Not The Only Way To Big HP
One of the most famous cars of the the early 2000’s was the HKS R33 Drag Skyline. It was a time when the Skyline GT-R was not really that known outside of Japan and AWD was a technology that was best suited to rally cars.
Beginning in the mid-1990s, HKS started a program to develop an RB26 into a drag car engine that would produce more than 4 times its original horsepower. This development program resulted in an engine that would eventually produce 1,300 horsepower reliably. To get to this power level, HKS started with a custom billet crankshaft, H-beam conrods and 87mm forged pistons. Next the head was ported, larger HKS valves fitted and high-lift cams replaced the stock units. Twin Garrett GT turbos feed a 95 mm throttle body. Exhaust was handled by 4-inch pipes. Adjustable fuels rails feed 550cc injectors to give the engine the fuel needed to run 35 psi of boost. An air shifting mechanism controlled by a button on the steering wheel enabled quick power transmission through a 4-plate clutch to the front and rear differentials.
The HKS R33 Drag Skyline captivated audiences all over the world with its 4-wheel burnouts and incredible performance and was only suddenly retired because engineers at HKS discovered that the chassis had weakened to the point that the car was unsafe to run anymore. Even today, a decade later, the 7.67 best time of this car stands as a testament to the kind of performance engineering the Japanese tuner was able to accomplish.
Source article here.
Saturday, March 5, 2011
CNG SL600 Shows The Green Way To High Performance
Put an engineer with the vision to go fast without dirtying the environment, has the cash to make it happen, and a shop with the skills to do it and you get the Speedriven SL600. Owned by Bernie Towns, an engineer working for a natural-gas company in Texas, this heavy luxury car’s 5.5 liter twin-turbo V12 has been given a fuel and induction system makeover to make it produce 800 horsepower. The 1,000 pounds-feet of torque allows this clean-burning car to tackle the quarter mile in under 10 seconds. Top speed already exceeds 320 kilometers per hour but engineer Towns wants the car to hit 380 km/h.
The mechanical aspects of upgrading the car has been assigned to Speedriven and the project has reportedly received support from Mercedes-Benz USA in the form of an aero kit that will stabilize the car at the speeds it is projected to go. According to Speedriven, Bernie Towns the engineer can talk about things like CNG giving off 80% fewer harmful emissions than gasoline and other properties of the alternative fuel. The engineer and enthusiast also has the resources to calculate flame-front speeds, burr temperatures and other technical things necessary for the tuner to understand in order to properly convert and tune the car for CNG. Speedriven installed billet-wheel turbo upgrades, top-mounted intercoolers, full free-flow exhaust, and Speedriven’s ECU/TCU upgrade. The brakes have also been upgraded to deal with the triple-digit speeds the car is expected to hit.
Bernie Towns the enthusiast says of his inspiration, “So there I am, sitting at lunch one day and the people are talking about natural gas cars, and it suddenly hits me: we should convert the SL to run on natural gas!” So, with that thought in his mind Towns the engineer contacted Speedriven and the vehicle that has turned out is now a part of automotive history.
Original article here.
Wednesday, March 2, 2011
Judd-powered Hillclimb BMW Is A 5-Year Class Champion
Hillclimbing is one of the older forms of motorsport that is not as popular in North America as it is in Europe. There, the FIA-sanctioned European Hillclimb Championship is a popular championship which attracts its own share of specialized machines. One such machine is this E36-series BMW that was modified by Georg Plasa to win a string of championships in the classes it was entered in at the European Hillclimb Championship. In fact, this same car was champion in its class for 5 years running, being defeated only in 2010.
This car is powered by a V8 engine, but not one from BMW. If is in fact powered by a Judd Formula 3000 engine that features a flat plane crank which is a design trait it has in common with Ferrari engines. 580 horsepower is produced at 10,200 rpm. Yup, 10,200 rpm, which is sport bike territory. That power is fed to a Hewland SGT-S sequential transmission shifted by a Mega-Line shift system.
Other features of the car that made it unbeatable for 5 years are its CTG carbon propshaft, aluminum diff with Drexler LSD, KW 3-way dampers, magnesium uprights, titanium driveshafts, 6/4 piston brake calipers with 355/285 discs, the front being carbon/ceramic discs, Tevis MK20 ABS, 10 and 10.5x18 forged magnesium rims, exclusive use of Poggipolini titanium bolts, carbon body kit including a carbon roof, wind tunnel tested aerodynamics with documentation and Motec display with data aquisition.
The carbon fiber and lightweight components give the car a dry weight of 895 kilos or 1970 pounds. If you calculate the power-to-weight ratio of this car, it comes out to 658 hp per ton. Further use of a performance calculator predicts that it should do 0-60 mph in 2.87 seconds and the quarter mile in 10 seconds. No wonder that the car became, and still is, a sensation.
See the source article here.
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