What is the intake manifold has to do with making your car faster ?

Ok i have a 1986 Cutlass Supreme,and i want 2 make my car a bit faster,but wat is the purpose of putting on racing manifold on my car ?What's the advantage ?What is the intake manifold has to do with making your car faster ?
an intake manifold on its own will do next to nothing for performance, it will need a nice big carb sat on top to do any good, you'd probably be better off junking the cast exhaust manifold and fitting headers or both of course.





The advantage of a better manifold should improve the fuel delivery and air mixture from the carb to the cylinders its all a bit primative these days but it works on the old V8's but you'll need a holley or an edelbrock 4 barrel to get any performance benefits.What is the intake manifold has to do with making your car faster ?
Quiet down, class, quiet down. Here's the deal in intake manifolds. Their design has a lot to do with air flow, but there are other factors. If you have ever heard the term ';ported and polished';, or ';port-matched';, it is machine work that is done to an otherwise stock manifold to allow air to move more freely and smoothly through the manifold. The inside surfaces are polished to a mirror gloss, and the rough edges and flange areas are ground down and matched to the engine's so that as the air/fuel mixture flows through the manifold, it doesn't have rough or mismatched surfaces to cause turbulence and air/fuel separation. The length of the runners in and intake manifold is also critical. Short runners give you high-end torque, longer runners give you more low-end torque. The best things about a racing-type intake manifold are that it is more than likely designed for a specific power need, such as quick acceleration or greater torque, and it is probably much more precisely manufactured, whereas a stock manifold is a compromise based on overall driveability and emissions regulations, and you can bet GM is not going to take the time to port match and polish their cheap cast-iron manifolds. I wouldn't expect to see a lot of top speed increase, but you will probably end up with a somewhat quicker car with a manifold that has longer-than-stock runners and good port matching, gasket matching, and polishing. You may even be able to pick up a few horsies by installing a carb or throttle body spacer, as they have a similar effect of lengthening the runners a bit. Because you have a post-1975 car and you don't say what state you live in, you may want to make sure that the manifold you install is compliant with your state's emissions laws, or get ready to change back to the stock manifold every time you need to pass a smog test. Check out Edelbrock. That company has been around for years. I think Edelbrock supplied the intake manifold for Noah's Ark. Summit Racing is another excellent source.
an engine is nothing more than an air pump...more air in more horse power...after market intakes adderess this issue quite nicely...more flow more hp...if you drive it easy you will also pick up a couple more miles per gallon...more flow equals more efficency.
the racing intake manifold would be to get a better air flow into the combustion chamber but it probably wouldn't help much if that's all you did.
I agree with grass. It's all about air flow in and out, the thing to take into consideration is match the manifold to your application. Slapping a huge tunnle ram is going to hurt more than anything. Match the rpm range manufactures give you to the cam you are running, if still stock look at 2000-6000 rpm no higher.


Too large of a manifold will create too low of air velocity at low rpm and give you terrible throttle response because the fuel will not stay atomized and actualy pool up.
your car basically breathers better - more air