MGB: Supercharged 3.4 ??

Hey everyone,

Just found a supercharger on the local cragislist and thought someone might be interested. It seems the last thread about superchargers was popular ! :spinning:

It seems like a great sized unit for a GM 3.4 V6. I guess it would be best installed it with a carbed engine, but I wonder if it would work well with a Fuel Injected Camaro engine. Any thoughts???

Here is the link: http://phoenix.craigslist.org/nph/pts/1428374674.html

I enjoy reading everyones ideas on different engine options! Nissan turbo, Rotary, Ford, Chevy, Corvette, Variety is the best part of our web site:thumbup:

JR

I don't see any connection between the use of a supercharger and requiring a carburetor. In my simplistic mentality, I look at a supercharger as just a way to get more oxygen into the combustion chamber, and I look at injectors or carbs as ways to get the fuel into the combustion chamber.

For a fair number of motors, raising the amount of fuel/air charge introduced into the motor not only increases horsepower, but it also increases correspondingly the stress on the motor. For example, 8 pounds of boost increases the maximum possible combustion energy (and theoretical power) by about 55%. This means a lot of extra stress (up to 55% in a perfect world) on the bottom end-especially rod and main bearings. A lot of motors are not designed to take this amount of additional stress on a regular basis. Ones that can take this leveel of extra stress routinely are, some would say, overdesigned in the first place.

To ensure the longevity of a motor that was not designed for a supercharger, one might want to limit thesupercharger to very occasional use.

I would research the motor and see how durable bottom end is. Like my 2.3 turbo in my Mustang, boost changes me from 88hp to 200+. Big difference. Doubtful if factory efi computer will handle that much change without chipping or tuning it. Megasquit or another standalone may have to be installed. Forged pistons will definitely be a major thought. If adding boost without proper tune will lean out engine and pistons will fail. Been there done this. Too many modification to air flow without tuning computer on mine. Good luck Maurice

The 3.4 can take as much as 7 lb. 4 to 6 is plenty. The amount of pressure psi also depends on exhaust, manifold to mention a few.
The carb set-up with a centrifugal takes a modified carb, return fuel line, 1:1 fuel pressure regulator, FI fuel pump and a blow-off valve.
The centrifugal can also be used with a TBI system which is much better. Most factory superchargers as set up to 3-5 psi

The beusty of a centrifugal is tha it is linear. Meaning that psi goes up as the rpm's are increased

The unit that is shown in Craig list looks like an older Vortec, not totally sure, good units and parts available. I t also requires an oil line and oil line return.