Honda Civic Engine Swaps

2012 Honda Civic Si Coupe - Road Test

For the past six years, we’ve felt a little like Estragon and Vladimir in Waiting for Godot . So many hours have been lost debating whether the previous-gen Honda Civic Si produced enough power to hold its head above water in the pocket-rocket pond. Eventually, this existential controversy morphed into a kind of recreation, with Si devotees screeching fiery epithets from the bleachers. Well, finally, Generation Nine is upon us. “We’re saved!” shouted Beckett’s protagonists whenever they suspected Godot might momentarily appear.

Here’s a sad fact: Godot never showed. And whether the Si is “saved” likewise remains unclear. Let us review recent history.

Our first encounter with the previous Si came late in calendar year 2005, when we pitted it against a Volkswagen GTI. The Honda lost. In 2009, we inserted an Si into a seven-car comparo , where it finished fifth, gasping and sweating. We weren’t surprised. The Si’s engine—2.0 liters, 197 horsepower, 139 pound-feet of torque—relegated it to least-powerful status in the whole segment. It certainly didn’t possess the grits to fend off, say, a 263-hp Mazdaspeed 3 Grand Touring or a 265-hp Subaru Impreza WRX. What’s more, accessing the Si’s horses has always required the spinning of the crank and cams to a fine fare-thee-well. The VTEC didn’t swap cam profiles until 6000 rpm, and it was thereafter vital to rely on every single rev right up to the colossal eight-grand cutoff.

Of course, Si purists—and trust us, they are legion—smugly insisted that the little howler-monkey engine comprised much of the car’s charm. Yet in the same breath, they’d also confess the coppery taste of  humiliation whenever a WRX achieved 60 mph 2.0 seconds in front of them, fast becoming a gnat on the horizon.

Now comes Honda’s solution for the ninth-gen Si, a solution both simple and a little surprising, given the rumors of a turbo. Out goes the 2.0-liter engine, in comes the naturally aspirated 2.4-liter unit that sees simultaneous duty in the Acura TSX . The result is an unnoticeable 4-hp gain, but torque is up 22 percent—peaking at 4400 rpm instead of 6100 rpm—and that’s a difference you can feel. While they were at it, the engineers paired the engine to the TSX’s delightful six-speed transaxle. But is that enough?

Well, sort of. At the track, the Si nailed 60 mph in 6.3 seconds versus the previous 6.7, and it proved a half-second quicker in our 5-to-60-mph rolling start. Turn off  the traction control, and you can now shred rubber for 15 feet, followed by a Rottweiler bark as you bang into second. An improvement, for sure, but it’s still shy of the accelerative thrust of five turbocharged competitors, including the Speed 3, the WRX, and even the GTI, which has a similarly meager 200 horses but can nonetheless summon 60 mph in 6.1 seconds.

1995 honda civic engine swap? - Honda Car Forum - Accord Parts ...

Depends what you're doing with it. If you plan to actually race the car, you have to pick the engine based on the class and type of racing, because the wrong engine could, in some series, put you into a class where you absolutely cannot compete. SCCA for example, won't allow any engine swaps in stock class or SM (street modified), but other classes will allow a B16 because a 1995 civic was available with that in japan, but a B18C or K20Z1 would still be illegal. What wiring will be necessary will depend on the engine as well.

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