The following information is designed to answer some of the questions that could arise if you are considering supercharging a Holden 6 cylinder Red, Black or Blue engine. For further supercharger information see the V6 page or contact us.
The kit will not fit grey motors or the injected VK motor. Red, blue and black motors are compatible.
Parts required besides the CRS kit are electric fuel pump with good capacity, an electronic distributor or the conversion of the vacuum one to full centrifical if required.
Kits are available to suit the 2 barrel Holley carby or the recommended 2" S.U. During the testing the S.U. carby gave much better performance right through the range with smoother starting and idling with more power on the top end and certainly more economy. Should you want to use a carby of your own choosing, we could remove the manifold from the kit and supply the mounting plate to fit the blower thus giving a good start to the custom manifold. The blower comes with twin belt pullies of different sizes thus enabling two drive ratio’s to choose from. Belts and an adjustable idler are supplied with different width spacers to shift the idler from one location to the other.
Blowers are fully checked over and ready to go, they have Teflon rotors and the bearings run in their own oil supply. These are a Rootes blower from the 6 cylinder Toyota’s. Depending on the compression ratio of the motor and the blower ratio, boost will be 6 – 10 lbs. A boost gauge is supplied with your kit. The blower bolts to the drivers side of the engine picking up mounting points at the fuel pump mount, engine mount and thermostat neck.
A manifold bolts to the blower and feeds over the motor to the top of a 2 barrel manifold. Any brand will do such as a Cane, Lynx, Speco, as long as it has the two barrel 350 Holley base bolt pattern. If you have one of these manifolds we remove it from the kit cost.
If you have a blue or black motor with the Holden twin barrel manifold this can be used also, although it’s recommended to grind out the dividers to aid flow. A Holden 12 port head will not fit easily to a red motor. It is not recommended to run high compression, a decompression plate is available from Repco for the use of a turbo, with the different pullie ratio’s you will soon work out what is best. Always start off with big jets and low ratio. The car will have to be fitted with a cable accelerator, the cable and mount for a Holley is in the kit. The supplied boost gauge can be plumbed into the manifold where the vacuum for the brake booster used to draw from, the booster is connected to the intake side of the blower. The blower is driven by the twin pullie from the Holden 6 cylinder that had power steering and air conditioning originally. If you have such a pullie this also comes off the price of your kit. If you want to run power steering and air conditioning you will have to mount these yourself as nothing is available for the incorporation of these but this wouldn’t be a hard job.
We have not tested any form of gas on our test car or cam changing. The power increase was considerable with a stock cam (50%) so how much more could be extracted is unknown but consult your cam grinder before fitting any cam. It is not recommended to lighten the flywheel but fit a strong clutch as we found out in testing. Extractors would be suggested and a big flow pipe system. No measurable increase in engine heat was noted but a larger radiator is always a safe guard.
The costs are $1800.00 for a complete kit (State carby used). Remove $50.00 if you have the Holden twin pullie. Remove $100.00 if you have the 2 barrel manifold. If you have your own blower send it to us for the required work on it and remove $300.00. The price includes G.S.T. and packing. Freight insurance is extra. C.O.D. post is available as well as credit card and bank cheque for payment. Freight can be arranged by the customer or prepaid at this end. Costs by road freight would be: Victoria $30.00, Tasmania $45.00, NSW $45.00, SA $45.00, QLD $55.00, NT $65.00 & WA $75.00
