iv been building a 383 for a couple months now and im thinking it should b around a 450-475 and im thinking i want a lil more. the motor has been built with forged crank rods and pistons cause i was planning on going with a 150ish shot but iv been thinking about boosting it somehow lately. the motor has 10.5 to one compression and a carb so idk witch way to go. any thoughts??

 

10.5 CR is fairly high. Even with aluminum heads you would be limited on your intercooled boost. For a carb application forced induction takes a specific carb setup. You can't slap a normal NA Carb on and use it.

 

yea for the turbo u have to mod the carb for a blow through i thought and the motor has steel world sportsman 2's all decked out on it

 

Turbo or supercharger... either one.

The reason you have to limit your boost with the CR is to avoid detonation at all cost. Detonation melts, fries, and breaks things. You might be able to squeeze more out of it with additional cooling such as water injection kit or even higher octane.

Aluminum transfers heat better than iron. Iron headed 10.5:1 I would think is to high on pump gas to worry about forced induction when you figure the cost IMO.

A low CR motor with high boost will make more power than a high CR motor with lower boost.

A High CR Motor might make good power with high boost for a few seconds then it'll have issues. I've seen the aftermath of a 427 getting 22+ psi boost with not enough fuel and too much spark. It wasn't pretty.

There are CR to boost charts out there on the net you could look them up. They change depending on the forced induction type and the intercooler if there is one used.

 

thanks for the info i am just thinkin i just might go for the 142 or 144 supercharger kit on like the low boost pully just to get a lil extra out of the motor without blowing it up