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Mechknight73
National Driver
1001 Posts
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 Posted - 09 Apr 2010 : 8:24:37 PM
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The intake question I can answer.If you could find the HSV cold air intake from a VR ClubSport, coupled to a free breathing filter, this will be one of the cheaper ways to go. It's what you'd call "passive supercharging;" the faster you go, the more air forced into it.
A friend and I were doing experiments on his manual VL Commodore. This engine was completely stock, save for headers, and what I call "electrical tweaking;" making sure each electrical connection to and from the engine was joined as if it were soldered together.I noted the performance stats we were getting with this setup. We made a crude cold air intake; a vacuum cleaner hose cut in two, and fed into the original airbox (the original duct came out behind the headlight, not helpful for free breathing) Having a salt lake to play with, we did an acceleration run. The "mouth" of this intake was a plastic milk carton (experimental only. Not the final version) We noticed a marked difference, until the milk carton folded in on itself at 150km/h.
The final version was a custom plenum duct. 50mm tall mouth, spreading the width of the "grille" on the front bumper. This joined up to the airbox with a 65mm diameter duct, straight to the bottom of the airbox. At higher speeds, it was as useful as a low boost supercharger.
Headers and free flow. Within the exhaust, up to 25% more power can be lurking. Make your exhaust free flow (within reason, don't want to annoy the whole neighbourhood) Something I've noticed a lot of exhaust shops do on V8s with two separate pipes, is fit a balance tube, joining the banks just behind the headers. They tell me it improves the sound, and makes things run a little more smoothly.
Heads. ACL usually tend to sell their rebuild (Unsure about performance spec) kits through outfits like Repco, Burson, and Coventrys in Western Australia. There's always Street Machine's "KB's Workshop. KB's usually handy for knowing where to find this stuff.
They tell me the MoTec ECUs are really easy to program, but I've never had one to fiddle with. Australian designed and built, apparently can be programmed to run just about anything from a Holden Red through to a VL RB30, or an ECOTEC V6 |
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