I am wondering what kind of power levels to expect from a supercharged 383 lt1. This is the poweplant that I am planning for my car. I know a T-56 is stock rated at 455 ft lb torque so I would need some kind of dual clutch I know, also a beefed up trans and my rear is allready beefed up. What kind of hoarsepower would you expect?? I want to be able to eat twin turbo audis and many other camaros and firebirds and especially these weak supercharged mustanks.

 

depends on:

what kinda heads?
what kinda cam?
how much boost?
what CR?

 

You will do better posting this in "Forced Induction". But the answer is anywhere from ~400rwhp to ~1,000rwhp depending on what you want and plan to spend. The best way to approach a project like this is to start with a budget and think of the car as a system, all the parts right for the job and working together.

Your post raises a lot of issues, so just a couple of quick points. The stock T56 is a strong transmission. Don't worry about it until you start to get into the 700+rwhp range with drag race useage (clutch dumps with sticky tires). Yes, you will need a clutch. The McCleod Street Twin is the only way to go as far as I am concerned.

As a general rule of thumb, figure on spending at least as much on supporting components as on the motor. Fuel system, tuning, clutch, driveshaft, suspension, brakes, rear end (if you plan any drag racing), tuning, etc. all add up quickly.

Good luck.

Rich Krause

 

Also, in the FI world, "3.73 gears, high performance posi, T/A Girdle" is not considered a beefed-up rear end. I'm not doggin' your setup, just giving you the real world truth.

You're talking about adding 40-50% more power at once on a mild build-up. One launch on sticky tires with a FI car will probably snap the axles in half or chew up those gears.

 

First off I am talking about a 383 built for the street and one that is very street drivable.

If I was to add a blower it would be a votech or somthing similar,

Is it possible to get enough power out of a 383 thats blown with stock lt1 heads ported? ? ? Maybe lloyds heads...


I know my transmition can't handle an assload of power but it should be able to handle enough for now.

This car is never going to the track, it is allways going to be street driven with the corvette rims, no slicks.

If I was to explode the rear end I would buy an allready built bolt in 9 bolt.

 

It is extremely possibly to make good power through stock ported heads. I am still using stock ported heads and am putting down over 700 rwhp.

 

IDOXLR8! thats awesome CAn you tell me what your setup is my email is :

djk19@rcn.com


I would be very happy with 650 rwhp for the street done right so the car is drivable too

thats what i'm aiming for. weather it is from a NA engine with a lil nos or supercharged to get to that power level then I want to get up there. Probably like 650 or so. later