383 vs 383 HP

[toupee]

Hey all,
Just wondering if one of the engine gurus can tell me what dodge did different in the hi-po version of the 383 to get more horsepower out of it versus the standard 383?

[Nacho-RT74]

cam, windage tray, HiPo manifold exhaust, 4bbls and double valve spring ( well, spring with dampener )

[69CoronetRT]

Depends on the application...A body 383HPs got a dual point distributor too.

There is a difference between the 2 and 4bbl exhaust manifolds but the standard 4bbl and HP used the same manifold. There really isn't such a thing as 'HP' exhaust manifolds. They are either 2 or 4bbl manifolds.

[toupee]

Thanks for the responses guys.  I just got a 71 satellite that has a 68 383 HP in it.  According to the previous owner it is completely stock.  As near as I can tell without tearing it apart he is right.  I'd like to bump up the engine a bit, but I don't want to buy anything that is not going to be an improvement over what is there.  I want the car to be driveable so I'm not interested in anything radical.  I was thinking headers first, but am not sure whether to go long tube or shorty. 

[resq302]

Welcome to the site.

[ragin71]

   I know this is a little late, but I just read your post and thought of something that was not mentioned
concerning the differences between a HP383 and a 2bl383 and that is the compression ratio.
The Hp383 had 10.5-1 and the 2bl had something like 9.2-1. Also you may want to consider having
hardened valve seats installed in the heads as they were not designed to run on todays unleaded fuel

[375instroke]

The Satellite wouldn't have a 383HP, Magnum, or whatever.  It would be a 383-4V.  It's the same VIN number, but the cam and springs are the same as a 350 horsepower 440 in a C-body.  I started a topic about what 383 came in A-bodies and got lots of info about what 383 came in what car.  Read here:  Is Muscle Machines magazine full of s#!t?