The next project

well i now have an urge for more power, The extra power i require i decided to get through forced induction, while i have a choise between twin turbo's or supercharger. my one limit for now is to use a standard engine as it will be quite easey to replace it if all goes pear shapped. This will restrict me on my boost to 7psi but i should still get some good figures with a quick 0 to 60 time. Since i have bought the supercharger i have investigated a few methods of gaining power but after some long talks with mike at boost performance, i decided to try a single turbo before going on the the supercharger. Mike quoted me £200 + p&p for a brand new casting, i thought this was a very reasonable price and ordered one, on friday 9/4/04 just recieved the manifold in the post and this is what it looks like.

i will continue with the supercharger i bought later, this would be for my xr4i now as i think the turbo would work best on the 4x4

Below you'l see it placed where it will be mounted, the small mazda millenia supercharger, This type of supercharger is a hybred of a rootes type blower. i will post more pictures when i progress on this project,how ever here is some information i found on the mazda millenia S that uses this supercharger.

"The Miller Cycle, or type-KJ engine marks the first automotive application of both the Miller cycle and the Lysholm compressor. The main advantages to this design are power output and fuel economy. The engine produces a maximum of 210 bhp@5300 rpm, with a peak torque rating of 210 lb-ft@3500 rpm. The torque curve itself never drops below 182 lb-ft from 1700 - 8000 rpm. An outstanding achievment by any measure. Even more amazing is the fact that this power output comes from a 2254 cc engine with a very understressed 8.0:1 compression ratio. It would be fair to consider the engine as a "blown" engine, however, the application differs than a standard Roots blower. 2 plenum chambers feed 3 cylinders each with pressurized air. A Lysholm compressor is used because of it's low pulsation and therefor inherently quiter running. It was important to Mazda engineers that you feel the effects of the Miller cycle engine without hearing it. A helical gear train helps keep noise low, and the system as a whole runs very comfortably. Maximum male rotor speed is only 35,000 rpm, while the female rotor max's out at just 21,000 rpm. Even so, the effeciency of the Lysholm Compressor far surpasses that of a comparable Roots blower.

Again i could have approched TOP BOSS for this forced induction, after all "they are the experts" but again i wish to do it all my self, I have been in engineering for some years now and i have some understanding of the requirements, i would not suggest anybody could do this so take advice before attempting a job of this nature.

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