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Let's concentrate on the 2E engine. In our experience, installing mods on an engine usually happens in this order: intake, exhaust, head, tranny, block The intake of the 2E consists the carb and its intake manifold, unlike EFi engines, mods on the 2E intake only takes a simple filter install, easy, right? Usually this is what the normal auto buff does. But, you can do more to your stock intake without actually replacing it with a single side, twin down or side draught(draft), this is where money comes in... the 2E carb is an efficient carb, its main purpose is to help you reach 160kph without the consumption of a 1.6L engine. but to make the carb give out its all, the idea of saving gas goes out the window. This is now called "bore out", where in the diameter of the carb's main chamber is increased through grinding and polishing. But that doesn't end there, whenever a bore out is performed, jettings in the carb must also be modified, stock jettings are often times replaced with even smaller jettings, this is to prevent the carb from gas overflow. Now that the carb is bored out, its is only normal that you should also do the same to your intake manifold, remember, the engine only puts out whatever its sucking in. You can achieve this through port-matching the intake manifold and the carb on one side, and the head on the other end. On the exhaust side, this has got to be the easiest thing to modify, simply change the stock exhaust manifold with a non-restrictive, free- flowing header system, this helps exhaust gases escape faster, allowing your engine to suck even more air. Changing the main pipe also helps, but you can't just install any size, you still need to build pressure inside the exhaust pipe, too big of a pipe, would only make the engine lose compression. The muffler, pretty much a no-brainer, just make sure its pipe diameter is bigger that the rest of the pipe. Making these mods would make the 2E more powerful, and at the same time, noisier. You put a straight flow resonator somewhere in the middle, to silence things down a bit, a longer resonator is better, make sure the diameter of the pipe is bigger, if not similar to everything else. Typical bolt-on set up has always been the filter-header system-exhaust combo, but let's turn on the heat some more, and burn more cash. The head, like any human body, makes the body work, or in this case, the block. The head of the engine is a significant factor in an engine's performance, you may have heard of frankenstein set-ups, where in a head from an engine is bolted on to a different block, to acheive more horsepower. But unfortunately, a 2E, frankenstein set up isn't really a common thing, YET. However, you can do some other mods on your 2E's head that would give significant increase in power. First of all, PORT and POLISH, this is the basic in machine-shop modifications, air and fuel passes through the head, in layman's terms, porting is making the holes and passageways bigger in diameter and polishing is smoothing the large passageways. This is to make air and fuel travel faster inside the head, making it efficient, and put out more horsepower in less time. In this effect, the valves are also tapered and polished, for fuel and air to pass faster through the valve chambers. In time, the valve springs tend to lose its compression strength, this allows the use of double valve springs, air-fuel mixture and exhaust exit is greatly improved with this modification . The last modification for the head is amazingly, the most effective in terms of horsepower increase, the camshaft or cams may be replaced with cams with a more aggressive lobe arrangement, this modifies engine timing, usually advancing it and in turn, result in additional horsepower. However, this jeopardizes the engine�s �driveability�, racing camshafts in place of stock camshafts usually result in excessive vibrations emanating from the engine, making it uncomfortable during idle. What good would the engine be if it cannot transfer all the power to wheels, right? The transmission is something not be left unnoticed. One usual mod for the transmission, is the gripping abilities of the clutch set, where you will find the clutch disc, diaphragm spring and the release bearing. For starters you could dump the Asco brand replacement and opt for a heavy duty clutch, or even a true, blue blooded, racing clutch. Clutch feel will not be compromised , unless you decide to change to a double disc or three disc clutch set. Another modification often implemented is the use of a lightweight flywheel, this increases the engines�s ability to spin faster in less time, allowing the car to accelerate faster than usual. There is one common misnomer, that lightened flywheels, tend to slow down cars, this absolutely not the case, the �slowing� of the car is usually related to more of a placebo effect, wherein the driver is experiencing lessened car jerking and the feeling of power lag during acceleration, making it �slow�. There is one requirement, though, that lightweight flywheels can only be used on cars with non-stock modifications, because the car, usually relies on the flywheel�s weight to create engine inertia. A lightweight flywheel should be one of the last mods on a stock 2E, unless modified. Other last modifications on a 2E tranny is the complete replacement to a close-ratio system and Limited-slip differential, but then, that would be taking it too far. Finally, the block, the muscles of the entire system. A number of mods can be done on a 2E block, the first of which is �bore-up� or �rebore� wherein, the size of the pistons is increased to create more horsepower, and while we�re at it, why don�t we get aftermarket, hi-compression pistons, allowing the engine to achieve higher rpms. Stroker kits are old school mods� I�m not too familiar with the power increase it can do, but I bet its effective, never heard of a 2E stroker kit anyway, so why bother? But I definitely heard about a lightweight crankcase, allowing your engine to pump the pistons faster than usual. All in all, building your ultimate 2E is all about weight, and with these mods, I�m pretty sure you�ll go far ahead of the competition, albeit disintegrate your wallet. But for me, there won�t be any alternative for speed. back to toolbox menu |
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