Before we get in that some things to think about.

When it comes to Supercharging, bigger is not always better. Just like baking a cake, you have to have the correct ingredients. Building a supercharged car or just modifying a car is the same. You should approach your build the same way you would build a cake or anything for that matter. Gather knowledge, see what it is going to take to make your horse power goals. Then ask yourself is it practical? Can I afford this? Do I have the experience to do this by my self or will I need help? Can I recover if a component fails? Remember in the aftermarket world, the “better parts” are still just parts.

If you have a “Stock” car and simply want more, power Kenne Bell has gone through the rigorous testing to see what works and what fails. This is not “my buddy on the internet” with an opinion, this is a company that will take a factory stock engine and just keep testing till we get to the limits. We have dyno run after dyno run on any kit we sell, we know what a stock engine can handle. We combine the all the components needed to safely run the power we advertise. Its the most we feel you can get safely with today‘s fuel. So when you order our complete kit, you have a complete emissions legal inclusive kit.

Back to the is “Bigger is always better”. With in reason, this is true, to a point. If you have 100% bone stock 2v Ford engine, you wouldn’t want to run a 4.9. The 2.1 is perfectly sized for the 9-10 psi it will run. Even if you added a set of cams, long tubes and custom tune for the street and mild race track use, it is still plenty of supercharger. When looking at a supercharging your car there are a few things to consider when making a decision on which size supercharger to go with.

1. Size the supercharger to what you are going to do. If you plan for the most part to keep it stock (displacement, cylinder heads) stick with our suggested size.
2. If you are going to change the engine components, figure out what peak horse power goal is and size the supercharger accordingly.
3. You will want to size the supercharger so that you have some room to grow, but not so big that it it makes more boost then the engine can handle and/or not so big that it actually hurts power (parasitic loss).

When looking at a Kenne Bell Twin Screw Supercharger, you want to size the supercharger so it still has that kick in pants down low torque. If you go to big you will lose that low end and it will feel lazy, just like a belt driven turbo. It may make a slightly more peak horsepower number but the down low and mid-range will pay the price. When racing it is more about getting the car moving and that is a flat torque curve.

Modifying our cars can be a lot of fun, but if you are not careful it can be a lot money, pain, and anguish. As always, we’re here to help you with your perfect supercharger kit. Contact us for any questions you may have.