Dodge Colt Turbo

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Dodge Colt Turbo
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In any discussion about turbocharging, the issue of turbo lag is sure to rear its ugly head. For many, turbo lag is a major issue but the issue of turbo lag is greatly misunderstood. No, turbo lag is not a myth, and yes, it does exist - in technical terms, turbo lag can be defined as the time it takes the turbo to spin fast enough to produce boost pressure. However, it is not as bad as most people believe.

The problem originates in the 1980s when turbos and superchargers became so popular that several marques started producing OEM turbo vehicles like the 1983 Nissan EXA Turbo and the Mitsubishi Colt 1600 Turbo. With these vehicles, the issue of cost and reliability was more important than performance. In a sense the turbo was more of a marketing gimmick as a 78 kW turbocharged 1500cc motor cannot be described as a performance vehicle.

There are two things these manufacturers did to give turbo lag a bad name: to minimize costs they produced turbocharged vehicles without intercoolers and then, to deal with the increased temperatures of the compressed air that was pumped into the combustion chamber, and to minimize detonation, they lowered the engine's compression ratio. The Nissan EXA Turbo, for example has a compression ratio of 7.4:1 compare to the normally aspirated engine's compression ratio of 9.0:1! This robbed the engine of power and performance that was not compensated for by the turbo until the turbo spooled up and started producing boost pressure!

Fortunately, these vehicles were also fitted with small turbos so they spooled up quickly enough, but the small turbo also contributed to backpressure in the exhaust system. This affected the exhaust's scavenging ability and increased the possibility of reversion. In essence, it reduced the engine's volumetric efficiency, further robbing the engine of power and performance. Again, these deficiencies in performance were only overcome when the turbo started producing post pressure.

With a much lower compression ratio, increased back pressure and reduced volumetric efficiency, an OEM turbocharged vehicle was often out performed by its naturally aspirated brethren in those precious few seconds while the turbo spooled up to spin fast enough to produce boost pressure. Once the turbo spooled up and started creating boost pressure, it more than compensated for the deficiencies caused by the lowered compression ratio and lowered volumetric efficiency.

But today, with the advances in turbo technology and the use of an intercooler to remove some of the heat that is a natural side effect of compressing air, it is not necessary to lower the compression ratio. Indeed, with the proper use of an intercooler turbocharging has become a bolt-on accessory with no need to open the engine. Also, because you don't need to get boost pressure so quickly, you can run a slightly larger turbo that is better suited to the exhaust system and produces far less back pressure. This effectively takes turbo lag out of the equation. Even though the turbo will still have turbo lag, the engine's power and performance is not compromised by lowered compression ratios and increased backpressure.

So the use of a properly sized and efficient intercooler should be a compulsory part of any turbocharger system if you do not want to suffer the consequences of turbo lag.

Brent Harris served as an apprentice motor mechanic at Reitz Nissan in the late 1980s before going on to the University of the Western Cape where he obtained a MA. His passion has always been cars and he has extensive experience in modifying Nissan engines. He is currently self-employed and serves as the editor for http://www.custom-car.us

For more information on turbo lag, intercoolers, and other forced induction articles, visit our website.

Get Lavish with Lancer Saloon

Mitsubishi Lancer Saloon is a family car produced by the Japanese motor car company Mitsubishi Motors Corporation. In various countries, this model was known with different names. In India, this was known as the Hindustan Lancer, and in different countries, this has different names like Eagle Summit, Mitsubishi Carisma, Dodge, Colt, Chrysler Valiant Lancer, and Galant Fortis. Throughout the decade, this Lancer model was one of the best selling models of all time. It was very great in terms of fuel and other efficiencies and the technology of this model was enhanced too. In Japan, in the year 2007, the model was known as the “lavish car” due to its famous fame. Many people from big families used to drive this in races and especially youth were involved in this.

Mitsubishi Lancer was introduced in the year 1973 and since then till 2008, more than 6 million models were sold making Mitsubishi Lancer the bestselling car in the world after Hyundai. Lancer was very successful the moment it was launched and in many parts of the world, this car was used for rallies and car races. In the year 1975, the Mitsubishi Lancer was introduced as hatchback coupe- the Mitsubishi Lancer Celeste. It was, however, also known as the Colt Celeste or Mitsubishi Celeste or the Chrysler Lancer Coupe in many parts of the world, especially Australia and in the United States of America. In US, the model was at peak and as many as 89,000 models of this car was sold making the revenue of Mitsubishi hit 78% alone in the US motor market. The models came with 1.4 L and 1.6 options along with 2.0 L model.

In Europe, the model was known as Lancer EX with 2.0 L 4-cyliner engine which was known as EX 200 Turbo Lancer. It was the first ever Mitsubishi Lancer, the car, which used 4g63 engines in an impeccable way by giving ways to the world of many new gates and then it made things easier for people and then people started preferring this model. The model achieved more than 168 bhp (125 kw) and the top speed was more than 201 km/h or 125 mph. the speed was amazing and when you did high speed, you would notice that it works like a sports car.

This car can cover a quarter of mile in just some minutes. In rallies, this car was mainly used. Did you know? The fuel injection was used in order to make the driving smooth and more than 1000 rallies took place and Lancer stood at first place. The outstanding and ultimate fuel efficiency was calculated at 28.8 to 37.2 mpg. The sales of this model were very low and due to this emission, the regulations were imposed in Japan at that time. Mitsubishi Lancer Saloon today is a name in the world, the famous name and people love to buy this car.

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mitsubishi engine swap into mirage?

i have a dodge colt 90 aka mirage and i want to put a 4g63 turbo or non turbo in it either or
well i want to know if the holes for the swap match and if i need to swap my trans too
will the ecu need to be changed out too

In short, here's your answer:
the holes: Engine mounts are different unless you have a 4G61 right now
Transmission: All 4 cylinder Mitsubishi engines/transmissions use the same bellhousing, so you can mix and match. Transmission strength is another issue though. I'd just go straight for a F5M22 gearbox from an Eclipse or 4G61t Mirage turbo
ECU: definitely needs changed. If you have a 4G61t, just swap it for a 4g63t one. Otherwise, you'll have to redo the harness.

www.mirageforums.net has all of the specific details on it. Also, be sure to check out www.lilevo.com too. He is the guru of all 3rd Generation Mirages and knows more about them than anyone else. Read up on his site and you'll learn tons

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