Hey whats up. First i would like to say i finally got a name on this site that works. My old one wasnt working at all and when ever i put my email address to request my password it wouldnt give it to me. SO.......i switched emails and made a new name.

Now i already did a ton of stuff to my car, and im ready for the engine now. I have a stock 305 TBI. What i want to do is supercharge either a crate or an engine i build. I dont have alot of knowledge on engines as of compression and lift and all that stuff. 10:1 compression is too high to supercharge right? what is a good compression to look for when building my engine with having the supercharger in mind. Could i get a ZZ4 crate and supercharge that? A lil info on the basics about supercharing and some good setup combos would help me decide alot easier. Thanks alot!

John

 

You're best to build a motor yourself for a supercharged project.
1. you can build a better quality motor then you can buy.
(with the help if a skilled Automotive machinst and shop.)

2. you should build with forged pistons especially if you'll be experimenting a bit. They will tolerate more punishment and tuning mistakes.

3. a supercharged motor creates more heat and needs slightly larger clearances (piston to bore, top rind gap, valve guide to stem clearances) as compared to a fixed hp N/A crate motor.

4. to start with the right compression ratio and quench clearance.
The best compression ratio will depend on a number of factors.
The type of blower/ turbo u use.
The amount of boost desired.
Intercooled or non intercooled
Cylinder head material and design.
The octane of the fuel you can/will buy.

For a said octane fuel: low compression, alumium heads,
intercooling, water/alcohol injection, will allow more boost.

Detonation must be avoided.

Good pre-planning and research now, will pay off later.

A 10:1 compression motor can be supercharged but there will be limitations on the amount of useabe boost on street gas.