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...universal? I am trying to buy one for a honda crx del sol on a 1994 plate.

 
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in most cases, superchargers are made to fit specific vehicles or specific motors.

 
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No they are not universal. Try this linkhttp://www.horsepowerfreaks.com/pric.../Superchargers

 
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the supercharger should be purchased as part of a kit engineered specifically for your engine and car. The supercharger itself doesn't have to be specifically engineered for a single car, but there are many factors and considerations and I'll try to keep it brief.A supercharger forces more air into the system by compressing it. The guts of superchargers are essentially the same design, either a positive displacement roots type or spinning turbine type like a turbo. There are different size superchargers and individual superchargers work best in specific ranges of rpm and displacement. A supercharger for a 5.0 liter motor that redlines at 5200 rpm is not going to be ideal for a 1.8 liter that redlines at 8000 rpm, despite the fact that you may be able to physically attach it. The other part of the combustion equation is the fuel. Air to fuel ratios should be near 8 to 1 for perfect combustion. Your stock injectors won't keep up if you're pushing too much air through them and if cylinder pressures are too high, you'll also need higher pressure injectors, not just higher volume. Plus, your computer may need tweaking because it will likely correct for different exhaust gas analysis based on stock excess fuel readings rather then the increased amount of excess fuel or air with a supercharger. You'll need a belt and pulley combination that drives the supercharger at the correct speed and the brackets to mount everything to your engine. Going back to the ignition issue, stock timing will have to be retarded. The engine won't run correctly with the higher compression if your ignition timing isn't appropriate. I'm sure you'll agree, there's a lot more to it then simply bolting it up despite their somewhat universal designations.If you have a LOT of experience in tuning engines and excellent mechanical design on your resume, you can do an internet search to determine if you want a turbine or positive displacement blower and an appropriate brand and size for your displacement and operating horsepower range. With that, you could go about engineering your own kit, and there are books dedicated to this subject. The little bit of extra money you'll spend on a complete kit (especially for a Honda - they're all over!) will be well worth the reduced headaches and you'll beat your head against the block enough just trying to install it, let alone engineering it!!! Best of luck!

 
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Not specifically produced, but must be matched to the size of your engine. Your best bet would be to buy a kit, then it would match and all the parts will fit.