Description
It�s a rotrex C30-94 with bespoke brackets, included would be injectors, S/C, brackets, air filter and tubing to feed the S/C, brand new oil feed system( for s/c) injectors and the correct sized belt, the restrictors also included, it�s been machined to provide 0.6 bar of boost which makes 288.4 bhp. Very easy to make a new restrictor to up the boost for more power. If you run an Omex I can supply a map to get you up and running straight away too.
The clam is coming off in the next couple of weeks so will be available very shortly.
Out of curiosity, whats with a restrictors? Surely the boost is set by the pulley size? Or does cranking the speed up and choking it give more low end power?
Another benefit to using the ROTREX, as opposed to any displacement charger is the fact all displacement chargers produce maximum boost at about 3000 engine rpm and then tail off as you rev higher. This is a big problem when driving, as you do not want near max power at low rpm as you get tremendous traction problems, which is a particular problem if you compete in drag races and standing quarter miles, as all you do is spin the wheels and go no where. The ROTREX, being a centrifugal type charger has a nice even increase in boost pressure rising in a linear pattern, with useable extra power from 1000 engine rpm and max boost at 7000 rpm ( or at what ever you desire, depending on the engine).
The latest revision of ROTEX unit is integrated with its own oil pump and supply as opposed to the older models which had to be connected to the engine for an oil feed. The main advantage of this is that special traction oil can be used which gives a very high standard of lubrication but does not include any friction reduction additives that are contained in modern engine oil, especially synthetic. In this configuration we are able to produce a lot more boost(up to 1.25bar), an increase of 0.4 bar more than the older units! Together with the new style supercharger we have developed a completely new design bracket to hold the unit in place including an integrated belt pretensioner to minimize belt jumping and slippage that can occur when coming on or off the accelerator very quickly.
Just because these units can generate up to 1.25 bar of boost does not mean that we recommend running them at this level without making sure that your engine has sufficient modifications to cope with the pressure. We can tailor the setup to each customers requirements and if desired boost can be limited by the use of a restrictor. Our Saxo kits run between .5 and .8 bar of boost, so you can see high boost is not necessary to get big power. When thinking about the boost pressure you would like, forget figures you have seen about Turbo cars, with a supercharger the quality of the air is so much better, for quality read less hot, for less hot read more power. I know many of you reading this will have heard stories of Renault 5s using 2.5 bar of boost 26 lbs per square inch, firstly I doubt this figure as I do not believe the engine will stand this pressure without major modification. Secondly it is a matter of physics, when you compress a gas it makes it hot and the heat rises at the square of the pressure increase, so doubling the pressure raises the temperature 4 times and as you loose 3% power for every 10C you raise the air temp, you can see that the gains of increasing the boost pressure get smaller the higher you go. What you want is the best power with the lowest boost pressure as the bigger the pressure the more strains on all the engine components, plus if you boost too high, even with the best intercooler in the world, the inlet temps still get very high, which brings along the possible problems of detonation.
