Daihatsu YRV K3-VET Turbo R Specification & Differences
What is the Daihatsu YRV Turbo R? Is it a Type R like Honda? Sadly, no. It is simply a sporty exterior and interior grade configuration, and not a racetrack or racing version. According to Daihatsu, the Daihatsu YRV Turbo R was announced on 27 December 2001. The announced differences include:
- Same K3-VET engine with floor shifter, 4 speed Steershift automatic transmission.
- BBS aluminum wheels.
- Multi-reflector halogen fog lights, crystal clear combination lamps.
- Turbo R decals.
- R only tuned suspension, 2WD versions are lowered by 15mm.
- Sports exhaust system.
- Leather wrapped steering wheel.
- White meter with maximum speed of 220km/h.
- Optional Recaro SR4 seats.
- Six new colors including Yellow.
- New black color seat upholstery.
- We get the leather stitched steering & the 220km/h white meter.
- YRV Turbo R comes in both 4WD & 2WD, be sure to get the 2WD version.
- YRV Turbo R runs ECU P55 or P57 with immobilizer.
- YRV Turbo R gear shifter is on the floor, not on the steering column.
- YRV Turbo R has 2 oxygen sensors, 1 before the catalytic converter (same as normal K3-VET) another after.
- YRV Turbo R gearbox comes with the 3 holes required for Engine Mounting #2 when transplanting into a Myvi.
- YRV Turbo R has an coil igniter box below the intercooler. Thank you Hadzrul Hawami for the picture & chart.
The steering wheel is the exact same part as the normal YRV Turbo, but wrapped with leather and finished with red stitching. The Recaro SR4 are optional parts and it would be rare to find them in halfcuts.
I have also obtained a chart thanks to Hadzrul Hawami, which details the differences of the Turbo R via the ECU connectors.
Basically the extra items on the Turbo R are as follows:
- Igniter unit (with ion current detection) No.14 ICMB on Connector B
- Ion current sensor ground No.43 IE on Connector B
- Rear oxygen sensor No.74 OX2 on Connector B
- Rear oxygen sensor heater No.50 OXH2 on Connector B
- Front oxygen sensor heater No.20 OXH1 on Connector B
- Knock sensor No.53 KNK is missing on Turbo R!
Analysis of the Turbo R
I have yet to determine what the igniter unit does, but the K3 series of engines are distributorless direct ignition utilizing coil on plug ignition system. No surprises as we know there’s a 2nd oxygen sensor after the catalytic converter which is not present in the normal YRV Turbo. An interesting addition is the oxygen sensor heater which heats up the o2 sensors to operational temperatures. O2 sensors only work effectively when heated to approximately 316°C. Without the heater it would take longer as the sensor will be heated by the exhaust which takes several minutes. This slow start-up process causes pollution problems – not a problem for us. Finally the most surprising thing is the knock sensor No.53 KNK is missing from the Turbo R, which simply means that the engine can’t detect knock and retard the timing say for example if you’re using lower RON fuel than specified. For cars with knock sensor, usually when it fails, the car will revert to safe mode or limp mode where power is severely limited to protect the engine. I haven’t figured out why it is missing, or maybe it is a printing error.
I figured out what the igniter unit does, basically it replaces the traditional knock sensor by using the spark plug to detect an ionic current flowing in the combustion chamber to detect an occurrence of knock. Which is why knock sensor No.53 KNK is missing in the Turbo R. To put it simply, it is to improve the accuracy of detecting the occurrence of knock. You can read the detailed patent by Daihatsu here. The patent was filed in 15th February 2001, and Daihatsu already incorporated it into their Daihatsu YRV Turbo R at the end of 2001.
To Turbo R or not to R?
Is the K3-VET engine in the YRV Turbo R more powerful? Based on this analysis, nope. The engine block and the turbo is the same as non-R versions. What the YRV Turbo R K3-VET engine has is stricter emissions and better knock detection.
Maybe, but the engine block and the turbo is the same as non-R versions. If you’re paying RM1500+ extra for the YRV Turbo R, I suggest you buy a normal K3-VET and add a boost controller with Greddy E-Manage and you’ll definitely make more power.