To say that tuning options are limited for naturally-aspirated petrol cars would be an understatement. This is unlike the situation for turbo-diesels and turbo-petrols (notably, those from the VAG) that enjoy wide variety in the after-market.
I chose the piggyback ECU over a remap for several reasons. One,
to promote Indian talent. RaceDynamics (RD) runs a tight ship and is extremely active with its research & development activities. They've also got a fanbase in the Indian Motorsports scene. With a piggyback, it's a simpler exercise to take the car back to stock form anytime. At the time of resale, you can port your box over to the next car, and there's no danger of overwriting a remap if the ECU is flashed (
similar thread). If you are so inclined, it's possible to tweak the map yourself with the RaceDynamics software.
Unlike the diesel power boxes though, there aren't any switchable driving modes (e.g. economy, performance etc.). Further, the overall effect isn't as strong as what a power box brings to a turbo-diesel. After my first experience (year 2006) with a diesel power box in Robin's Octavia TDi, I went
"WOW". Upon driving the RD in my Civic, I said
"Nice". It's important for you to understand this, don't expect the kind of gains you get on turbo-charged motors.
I got in touch with Karthik @ RD earlier in 2013. Told him that I'm really looking for low to mid range power enhancement, as the Civic has excellent high rpm performance in stock form.
Old PowerTune:
It was decided to temporarily fit the outgoing generation PowerTune as a stop-gap until the new piggyback was ready. I got the piggyback fitted @ KS Motorsports. RD didn't have the simpler connectors ready and initially, a more complicated wiring harness was used. Honestly, the wiring & install looked incredibly messy, I wasn't happy at all. The ECU was mounted differently too. The improvement in driveability with the PowerTune was immediately noticeable, while power delivery in the mid-range was punchier too. On the flip side, there was a distinct hesitation just after idle rpm. The engine would knock from time to time below 2,000 rpm as well. At times, I could hear the exhaust pop (when letting off the throttle).
I kept Karthik in the loop with feedback at all times. In a couple of weeks, my car got the new PowerTune Piggyback. This report will focus on the updated box.
New, current-gen PowerTune:
The new piggyback was a quicker & easier install. Karthik had pre-loaded the maps before sending it across to N1 Racing, Mumbai. The shorter & simpler wiring harness looks neater and the ECU has been moved back to its stock position. I'm a fan of "clean" and don't like modifications that end up with a cluttered look. On a related note, the PowerTune casing looks / feels very high in quality. It's got a decidedly premium finish, faux carbon fibre included.
I was pleasantly surprised that the low rpm throttle delay and knocking issues were completely solved with the new RD PiggyBack. Throttle response has significantly improved and there is simply no comparison with a stock Civic. While the intake & exhaust (link to earlier reports are in the opening post) made the Civic's driveability stronger, the new Piggyback has made the a-pedal even sharper. Torque delivery from idle rpm is seamless, and you can move away with light accelerator inputs (no fear of stalling, Civic owners will know what I'm talking about). Additionally, the Honda clears medium-size speed breakers in 2nd gear itself (no downshift required like in a stock Civic). Power kicks in an extremely linear manner and driving around town at low speeds is actually a hassle-free experience. If I were to put a number to it, part throttle response from the engine is at least 30% better. No, it's no Toyota Corolla yet. If the Altis' driveability is 9 / 10 and the stock Civic 5 / 10, my car's current tune can be safely given a rating of 7.5 / 10. It actually doesn't feel like a weak Honda engine at <2,000 rpm anymore!
The fun continues on the open road. Floor the throttle and there's increased torque steer (first indication of a bump up in power)...in 2nd gear too, you can feel a certain amount of torque steer. Keep the pedal pinned to the floor and you'll have the Civic wheel-spinning in the upshift from 1st -> 2nd (never happened before on the Michelins). While I had stressed on the low - mid revv range, the engine has become more eager past 4,000 rpm. An added bonus. The Civic was always a revv-happy engine, it’s even better with the piggyback. From the
seat of the pants, I'd say the RD piggyback has taken power up by 6 - 7 BHP.
The map Karthik has chosen for my Civic is spot-on. Next up : Asking him to remove the revv-limiter and take me to 8,000 rpm.
For Rs. 21,500, I'm pleased with the engine's enhanced state of tune. Of course, 20K would get you more bang for the buck if you drive a turbo-engine, but again, the options are limited for N/A petrols. I'd still recommend the exhaust & K&N Typhoon as the first mods to a Civic owner, and the RaceDynamics after.
If you're a Civic owner running a RaceDynamics Piggyback, I hope you've got the exact same map as my car. It's spot on.
