I'm looking into putting a supercharger on my 1980 corvette with a 383 stroker. I don't know where to start so can anyone give me some guidance?

 

There are two types, centrifugal and roots, but…

Before getting into which supercharger, we need some engine specific’s…

Compression ratio - You’ll need to be under 9.5:1, without needing E85 or 100+ octane.
Carburetor type - Most likely you’ll have to modify the one you have or buy a boost specific one…. Depending on supercharger.
Camshaft - Superchargers like 114 LSA cams.
Exhaust mods - To make the most out of a supercharger, you’ll need a header back exhaust.

Is your short block able to handle boost?
What is your horsepower goal?


Sure, We can go tell you to buy a F-1X Procharger and run 25lbs of boost on E85 to make 1,000hp, but we don’t know if that will even work with what you have.

Oh, and I always like to be more on the conservative side, so I would also suggest a boost specific ignition.

Just supercharger, carb, and ignition and you’ll be in the neighborhood of $4,500+ installation.

P.S. I also forgot you’ll need a boost reference fuel system. Best way to go is with an electric fuel pump over mechanical. You’ll have to run whatever your fuel PSI at the carb plus lbs of boost…

 

 

If you decide to go the centrifugal SC route:

Centrifugal SC Information / Thread

There are a handful of other threads as well regarding the centrifugal SC's. Search the C3 corvette forum, you'll find some good information.

 

Today I purchased a 383 Rotating assembly from CNC Motorsports for my next build.

 

Naw, nothing like a big ole 6-71 sticking out of the hood!

 

 

Take a compression gauge and test the compression......if it is 180-200....don't put a blower on it. 140-150 is ideal for blower consideration.....
Street blower engines need to be around 8 to 1 to be able to take any boost......but 10 to 1 is too high for pump gas.....this is assuming 6-7 psi which is the norm for street roots blower application.

Jebby

 

Just for fun, I was playing with horsepower and volumetric efficiency calculators. If a 383 puts out 425hp at 5500 rpm, it has a volumetric efficiency ratio of roughly 85 percent. Based on this, the required amount of boost to get to 550hp is only 6.5lbs. Which is very doable on the street (93 octane) with a centrifugal supercharger running through a carb. The carb will provide a slight cooling effect on the charged air similar to an intercooler.

These are just “labatory” numbers, but appear reasonable based on real world numbers. Of course to get to these numbers, the engine will need the supporting mods.

 

blower shop 671 .