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Written by Nolan Taylor
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Thursday, 15 January 2009 21:21 |
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Its a solid fact and a tool frequently used in the cars of the WRC. Philly's SCCA Rally Cross Chairman and fellow RS25.com member Ryan Schramm (a.k.a. RALLY-FAST) explains all. " Ever wonder why that rally car goes BANG-BANG after every shift or while coasting? Becasue it's equipped with an Anti-Lag System, or ALS for short (some people also call it the bang-bang system but from here on out I'll refer to it as ALS). Basic Explanation: ALS is an engine management system that minimizes turbo lag by injecting fuel and air into the exhaust stroke of an engine. The air/fuel travel down the exhaust where it meets the hot turbo vanes and BANG, it burns (expands) rapidly and keeps the turbo spinning to produce full boost while the driver releases the gas pedal. Turbo's in race and rally cars are often very large, which adds to the lag problem becuase of thier larger volume and increased rotational inertia. The watsegate or dump valve is often insufficient to allow the turbo not to lose speed when the driver lifts the throttle.First a little history: ALS really was born during Audi's dominance of the group B rally era of the 1980's. Group B cars were fitted with HUGE turbochargers to compress large amounts of air to make huge power, which because of their volume had significant amounts of lag when the car was not at full throttle. Stig Blomquist and Walter Rohrl (There is debate as to who was first, so I give them both credit here) realized that there was no lag if you never lifted the throttle. So they just kept thier right foot down while pumping the clutch and using the left foot for braking duties. Since this was hard to implement and even harder on the transmissions, they were quick to learn that a new system was needed. The first ALS system was fairly crude- an additional injector to add fuel directly to the exhaust before the turbocharger. This resulted in keeping the turbo spinning fast and happily producing full boost. However there often wasn't enough oxygen to allow this extra fuel to burn up before exiting the turbine housing, resulting in spectacular (and quite dangerous) flames shooting from the tailpipe. Eventually the Group B cars were outlawed becuase they were too fast, which subsequently resulted in the introduction of the WRC class in the late 1990's. Today's ALS Systems: When creating the new WRC class, FIA implemented a new rule of using a restrictor before the turbo to limit the volume of air the turbo can compress, essentially limiting the power output. This was to keep the cars competitive with one another and to help control speeds on the stages. (today's WRC cars often set new records much faster than that of the legendary Group B cars). A new system was needed to help the car accelerate and produce power at lower RPM's. Toyota was the first to implement this new design, follwed by the Ford Escort Cosworth, Prodrive/Subaru, Mistubishi and others. How it works: A standalone engine computer system retards the ignition timing (often 20-40 degrees of delay (depending on whether your car has 3 or 5 stars on the badge), and the fuel/air ratio is increased as the driver lifts the throttle. With no spark during the power stroke, the exhaust valve opens while the spark is introduced and the unspent feul and air travels down the downpipe towards the turbo. When it reaches the hot turbo vanes, the engine management tells the spark plug to fire, and the fuel burns rapidly which keeps the turbo spinning. The response if full boost pressure at vastly lower RPM's. Most systems have user selectable maps for more or less agressive conditions and terrain and usually can be turned off for road (transit) sections of rallies. The downside:-Vastly increased temprature of the exhaust and turbo. Exccess heat often degrades the turbo's oil seals much faster than a normal car, as well as cracks in the metal of the exhasut become more common with the increased temprature. A common myth is that the trubo needs replaced every few hundred miles. the fact is that with today's technology such as ceramic turbo vanes, better welding techniques and high quality componenets, turbos' can last much longer. Keep in mind that there are many variables and things can and will go wrong. -A voracious appetite for fuel. Many rally teams figure 7-9 mile per gallon for stage miles and 15-17 miles/gal. in transit (Subaru). -Severe degredation of the exhaust. Most ALS are not compatible with catalytic converters since unburned fuel clogs the catalyst. With the increased temprature and explosions occuring within the pipes, cracking is common. Some exhausts may only last a few hundred miles. -Many sanctioning bodies prohibit the use of ALS in regional events or based on car classification. Further Reading: Also check out these books and magazines: Race and Rally Car Sourcebook, by Allan Staniforth Perfomance Ignition Systems, by Christopher Jacobs, PhD." Special thanks to Ryan Schramm. Be sure to check out his work at www.Brokenmotors.com |
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Last Updated on Thursday, 15 January 2009 22:39 |
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Written by Nolan Taylor
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Thursday, 08 January 2009 20:16 |
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Well, its a new year, and AE has a few big things coming up. The Tech section will be coming soon, a couple new interviews, and some new write ups towards the end of this month. The forums will be officially opened soon as well. Something else I'm very excited about, Auto Enthusia's first ever budget build. Big plans big plans indeed for this year, so stay tuned. |
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Last Updated on Thursday, 08 January 2009 20:21 |
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Written by Nolan Taylor
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Thursday, 25 December 2008 00:27 |
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Well its that time again. That special time of the year. A time for peace, love and good happiness and stuff. Its because of this time, myself and the rest of Auto Enthusia would like to wish you all a very merry Christmas. |
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Written by Nolan Taylor
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Thursday, 25 December 2008 00:21 |
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 It's a rare occasion that this particular individual takes time off from his busy schedule, but when Ralph Radhey, owner of RMT Automotive in Temple Terrace, Florida, agreed with an infectious smile to have a sit down with us, we were thrilled. After a bit of small talk we got down to business. AE: You've been working on cars for a while now, where did you get your start? RR: "I've been turning wrenches since 10 years old with my dad back home in Trinidad. Maybe even longer than that." AE: You used to work for a local high end dealership. What inspired you to have a go of it on your own? RR: "Well, it was a dream of mine, a goal of mine to go out on my own." AE: So what does RMT specialize in? RR: "Well BMWs, unique custom work, one-off, but not on BMWs alone, any make and model." AE: What has been you favorite build, and what are you currently building now? RR: "I'm currently building a '94 Suzuki Swift GT turbocharged 1.3 liter DOHC , also a 1989 BMW 325i stroked to 3.2 and turbocharged M20 motor. We also have a '70 280SL Mercedes-Benz that we're doing an electronic fuel management, and some modification to the hood so it opens at 90 degrees instead of 60. I want to say the '89 BMW is my favorite. It has the 2000 M Roadster trailing arms, big brakes and axles. The front has '95 E36 M3 front suspension, and it has the 2000 Z3 2.8 rack and pinion." AE: With all this custom work,what plans do you have in mind for RMT's development? RR: "I plan to get a bigger shop, do more custom work, and build race cars." AE: Now you race in a few SCCA events throughout the year, but how did you get into racing? RR: " Because of my dad [laughing]. Following in the footsteps." AE: What can you tell us about your track car? RR: The car is a 1989 Suzuki Swift GTi competing in ITB (Improved Touring B class), in central Florida region. The rules permit you to blueprint and balance the engine. You can bore it to 0.040 over. You can raise the compression half of a point. You're allowed to put any header, exhaust, any final drive ratio, add LSD, ECU re-mapping, and anything in front of the MAF is ok. AE: How many cars have you built and what was the lastest track car that you built? RR: [Thinking]"Probably, I would say 5 or 6 including mine. The latest was a '69 BMW 2002. Wwe did head work and suspension all around, shocks, springs, bushings, braided fuel lines, fuel pump, and a Weber carb 2 barrel." AE: With all this emphasis on racing have you ever thought of running a driving school? RR: "Yes, somewhere down the road." AE: Well we're just about out of time, so in closing do you have any advice for techs looking to break out on their own, or up and coming racers? RR: "Just go for your goal basically, and if you're going to race work on your driving and your set ups before you add more power." RMT Automotive 8602 Temple Terrace Highway Temple Terrace, FL 33637 www.RMTAutomotive.com |
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Last Updated on Thursday, 25 December 2008 00:25 |
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Written by Nolan Taylor
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Thursday, 18 December 2008 20:54 |
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Everyone knows that Subaru's Impreza WRX STi has been a celebrated World Rally Championship winner on and off since its debut in 1992 at the hands of greats like Colin McRae, Richard Burns, and Petter Solberg. The car's reliability, its all wheel drive system, and near bullet proof EJ flat four power plant allow the former coupe, now 4-door saloon and hatch-back, to be easily driven flat out on any winding road on any given surface. Now, any Subaru enthusiast knows that the company has tendancy to produce limited editions of its STi and WRX Impreza rally-bred rockets at any given time. Unfortunately, if you live in the US you saw the likes of none of these. However, if you live in the UK well then you were graced with the likes of Prodrive's P1, the Richard Burns RB5 and RB320, the Series McRae, the Impreza Catalunya, and Petter Solberg's WR1. Well if you still live in the UK, and you're still in love with the company that made blue and gold a fashion statement, you're in luck. Behold the Subaru Impreza WRX-S and the STI330-S. Sporting big 18" allow wheels wrapped in Pirelli P Zero "Nero" 225/40 ZR rubber, STI front and rear spoilers, STI grille, and a Prodrive exhaust system, the WRX-S; though quite the head turner, is still a little brother trying to wear his big brother's clothes. The interior is nearly unchanged saved for branded floor mats and an aluminum Momo gear shift knob.
With a Prodrive Performance Package, the WRX-S gets a slight bump in overall horsepower; from 226.9 hp to 251.5 and a torque increase from 236 lb/ft to 287.6lb/ft. With near STI like numbers, Prodrive, who were consultants in the manufacture of both cars, says that the car gains better steering response and sharper turn in. The question stands though, "How much will it cost?" and better yet "Will it make a US appearance?" To the first, good question, as of right now there's been no MSRP posted . . . at all. And as for it hitting the US market- Keep dreaming. |
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Last Updated on Friday, 19 December 2008 18:50 |
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Written by Nolan Taylor
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Wednesday, 17 December 2008 00:13 |
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When buying a sports car a few things come to mind. They’re usually expensive, usually the size of a shoe, and that your backside would find more comfort planted on the toilet than be offended by some sorry excuse of a bucket seat. Let’s not forget the nagging argument from the significant other as to the spacious accommodations of your zippy-sporty mid-life crisis machine. “You can’t buy it because I can’t fit endless amounts of shopping in the back seat.” or “There’s no back seat.” or “Why is it so loud?” It’s a frustrating viscous cycle. Is it so wrong to want a little rear wheel drive, an open winding road, and some low-end growl? Is it? Is it really? Well fear no more, Mazda has you covered.
Ever since its debut the RX-8 has been a head turner. From its refined 1.3-liter 2-rotor rotary RENISIS engine, its low ride height and broad shoulders, to its stratospheric 9k red line; the RX-8 is every bit as aggressive as it looks. And if you didn’t know, the 2009 RX-8 is out. Its longer, its meaner, and today, I flogged it.
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Last Updated on Friday, 19 December 2008 18:49 |
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Written by Nolan Taylor
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Thursday, 04 December 2008 02:54 |
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The Dodge Caliber, a mixed up, criss-crossed, and confused road goer. Its what you get when a Dodge Avenger and a Dodge Durango go to bed with each other after a long night of drinks and dancing. In doing so, you’re left with a portly, snout-nosed crossover with a prickly demeanor, and a pretentious price tag. Our Caliber was decked out in SXT livery, and “Surf Blue Pearl” paint. The engine is a 2.0 DOHC 16V I-4 power plant, the likes of which produces a mighty exhaust roar loud enough to make a V6 quiver, but it moves like mud. They say it’s capable of generating 158 horsepower and 141 lb-ft of torque, and believe me; you’ll need every bit of it.
The Dodge gurus boast that the fuel economy is up to speed with an EPA estimated 23 city and 27 highway miles per gallon. These are expected numbers from a high end sports car, not a five-passenger sardine can.And with a 13.6-gallon gas tank and an overall weight of around 3,000 pounds excluding driver and passengers, this FWD econobox has a serious case of the ponch.

Now, with that being said, here’s where it gets interesting. For something nearly 20k USD you certainly get what you pay for. The interior, with its quirky and gaudy looking dash trimmings, reminds me of something designed by Fischer-Price. Need I mention the perverseness of the central mounted shift lever? I’ll spare you the embarrassment. You never really know who may be reading this.
However, despite its cheap feel and car/van mix up, the Caliber SXT is rather spacious, and the seats are surprisingly easy on the back bits. Another thing to remember is that it seats five, so you can very comfortably sit four of your best mates in there without squabble. Who really needs a fifth passenger in lap sitting distance of you anyway?
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Last Updated on Tuesday, 09 December 2008 11:31 |
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Written by Nolan Taylor
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Sunday, 30 November 2008 14:59 |
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The open road, the symbiotic melding of man and machine, and the pinnacle of driving freedom . . . until you come face to face with every free motorist’s nightmare, traffic. No words can describe the feeling that overwhelms you when you’re cruising the 275 at a “reasonable rate of travel”, only to have your spirited driving dreams blown apart, like the time you smashed your sister’s doll house an d ruined Barbie’s Honeymoon. Its an uneasy feeling knowing that at one time you were setting a ginger pace at 80mph to the tune of an exhaust note philharmonic, and then like a wet slap in the face, its over leaving you drenched, shocked, and wondering “Why and what did I do to deserve this?” No more engine symphony, no more joy, just full on rush hour stop. Hopefully you packed a snack because you won’t be going anywhere any time too soon. Its truly remarkable how a major highway becomes a parking lot as wide and vast as the eye can see. Its not like the construction boffins aren’t trying either. “Well we’ll make it wider.” Great! Add another lane, and while you’re at it, line its shoulders with fast food eateries so that when one gets hungry they can simply exit their car, get a bite to eat, and then get back in! Why not? They’re not in a hurry, at least not anymore. Perhaps one day there will be a cure for the motorway common cold known (dis) respectfully as “Rush Hour” Chances are . . . probably not. |
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Written by Nolan Taylor
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Sunday, 30 November 2008 08:43 |
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Hello and welcome to Auto Enthusia, a community site for the automotive purist. Here you'll find the latest industry news, previews, reviews, mark ups, mark downs, tech tips, facts, and finds! Think of it as a painter's pallete sans the paint and artistic drudgery for Petrol Head madness. So sit back, relax and read, and again welcome to the site! |
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