Bong Hilario’s 2004 Honda S2000 by H3 Autoworks

Photos by Philip Aragones and THE aSTIG

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The Honda S2000 is considered by many to be one of the greatest sports roadsters in the world. Because of the car’s 50:50 weight distribution, high output and high redline engine, smooth gearbox, and balanced handling, this car has received much praise from enthusiasts, critics, and journalists in the automotive industry. So by owning one will definitely be an honor for the select few individuals who happen to have one in their stable.

Of course, with this being a Honda, a brand cherished and loved by the aftermarket car tuning community, and this being a Honda Sports Roadster to be more precise, a greater joy comes from actually modifying the car to suit one’s tastes, and personality.

Now what if the car ends up in the hands of someone who runs one of the most renowned car tuning shops in the country, famous for tuning cars to the extreme? Well, ladies and gentlemen, you’ll get what you see here.

Join us as we take a look at what Bong Hilario of H3 Autoworks, together with Motul and Autocircuit, have done turn this 2004 Honda S2000 into a mean green machine…

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What struck me most about this S2000, apart from the loud green color scheme, widened fenders…

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…carbon fiber body kit…

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…and aggressively meaty wheel and tire setup…

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…is that unmistakeable side exhaust just behind the front right-hand side tire. What the hell!? That’s something that you wouldn’t normally see on a road car. Rather, that’s something that belongs in the realm of fully-tuned race cars that have been treated with tremendous amounts of engine whizbangery, that it ends up spitting exhaust flames with so much angst, that standing beside the car while it’s revving will give you reenactments of new year’s eve!

That was a mouthful to say. Why do sound like I’m talking while drooling? Because side exhausts are COOL!

Allow me to explain in engineering terms (yes, I have an engineering degree)… This is all a matter of fluid dynamics, where a fluid is anything capabale of flowing like gas or liquid. In this case – exhaust gases.

Now, Bernoulli’s principle states that “for an inviscid flow, an increase in the speed of the fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid’s potential energy.”

An inviscid fluid or ideal fluid is that which has no resistance to shear stress.

In applying fluid dynamics to exhaust systems, you’ll find that resistance is caused by several factors. To put it simply – the roughness, diameter, and length of the exhaust pipe. This means that the longer the pipe, and the less free-flowing it is, the more the resistance.

This resistance can create a loss of flow in turbocharged racing motors. Flow after the turbo is critical, as exhaust gases have to exit as fast as possible. Reducing resistance through a shorter exhaust pipe with an increased cross-sectional area will increase the flow rate, thereby increasing the speed at which the turbo can spool.

And since race cars are not meant to meet the noise and environmental regulations required of road cars, they are completely performance-based. Moreover, some races are less stringent on noise regulations. Road cars, on the other hand, need to have mufflers, resonators, silencers, and catalytic converters to meet noise and environmental regulations.

Simply put, race cars are different from road cars. That’s why race cars can have side exit exhausts, while street cars cannot.

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And since we were talking about turbocharged racing motors, take a look at what’s under the hood! See that? Definitely a turbo, and a massive one at that.

Now I don’t know why other people are against forced-induction on high-compression Honda engines, but from what I know, though you can run more boost on a low compression engine, every pound of boost you can run does more in a high-compression engine. This is because the energy extraction efficiency is greater if you have a higher compression ratio.

Take a look at the Lotus Exige S. It has a compression ratio of 11.5:1, but runs with forced induction from the factory. So boost on a Honda F-series engine should be a good thing to do, right?

I’m sure the organizers of the 2013 Trans Sport Show thought so too, as this car won 2nd place in Best Sports Convertible. Kudos to Motul, Autocircuit, and of course H3 Autoworks!

Related Stuff:
– See more coverage of the Trans Sport Show here
– See more customized and tuned Honda S2000’s here

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