Holden Rodeo 6VD1

Haltech Elite Powered EFI Upgrade - Stage 1 Upgrade

Vehicle Make : Holden
Vehicle Model : Rodeo
Engine Model : 6VD1 V6 3.2L DOHC 24v
Transmission : 5 Speed Manual
ECU : Haltech Elite 2500 ECU
Brief Mods : Extractors, Custom Exhaust, Duel Channel Wide Band Kit.

This vehicle came to RPW as part of a two stage process. The vehicle is used for towing and four wheel driving, but suffered from lack of overtaking ability, and had uneven idle issues. These issues were exasperated by the fitment of the extractors and exhaust system making the vehicle run ragged and feeling a sever lack of throttle response. Fuel economy was also quite terrible.

The eventual goal was to fit a supercharger in the near future so with that in mind we started with the following.

  • Haltech Elite 2500 Short Loom Kit wired into origonal harness for a factory installation look.
  • Haltech Duel channel wide band Sensor Kits for seperate bank adjustment.
  • Duel Knock Sensor input into Haltech ECU

The Haltech was mounted in the engine bay close to where the origonal unit was located. The wide band controller was also mounted next to it for ease of fitment. Once wired up and tuned the car was noticeably smoother at idle and on acceleration with some ability to over take now. There was a noticeable variation between LH and RH banks but nothing the Haltech could not cope and compensate for, especially with the duel wide band O2 system.

The vehicle is now back at Racing Performance Works for the development of a Sprintex Supercharger kit so watch this page for more updates soon.

Holden Rodeo 6VD1

Sprintex Supercharger Upgrade - Stage 2

The completion of the a two stage process which was the fitment of a in house designed Sprintex Supercharged Kit with the S5-355 twin screw supercharger.

This was fitted up with an integral Water to Air intercooler, custom designed for this kit. The result of this was to finish with intake temperatures at 10 psi boost levels of 50 – 60 degrees.

Fitted with 750cc injectors (For future E85 compatability), the kit is very easy to fit with only a five hour turn around time due to its modular design allowing most of the components to be pre fitted up on the bench with only four bolts to hold it down onto engine.

The photos show the results of how it fits into the vehicle, and the intercooler radiator fits very easily behind the front bumper with good airflow to it.

The results on the road was not just the horsepower improvement of up to 235hp, but the very powerful and flat torque curve all the way from 2000 rpm onwards. This does not feel like a 3.2 litre vehicle which is exactly what the supercharger design is about.

Note the dyno graph shows the comparison between the vehicle supercharged without the intercooler, and the previous naturally aspirated tune. The vehicle has not yet been tuned with the intercooled version, but due to design improvements in the airflow of the redesigned intake manifold and the cooling effect, the results are readily apparent on the road with its improved driveability and increased horsepower.

With the Haltech ECU in continual self learning mode – the vehicle is already adapting to its new configuration of being intercooled and responding appropriatly.

This kit is now in development and available for any Holden Rodeo owner to purchase . Development work is now being done for cross compatability for the later model 6VE1 3.5 DOHC engine. This kit will be far more impressive with the larger engine.