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Old 04-12-2012, 06:10 PM
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383 top end help

Hey there, i have a 1977 350 sbc that i have turned into a 383 stroker i have the crank pistons rods done i am now looking into a mild cam and what kind of heads/intake combination. any suggestions on the cam?
firstly can i use vortec heads with a older block like i 1977
and if you have any other random suggestions this is my first top to bottom engine rebuild so any input will help
thanx for the help
chase

This will be a street/strip car so the heads and cam dont need to be insanly radically just fair price with some balls.

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Old 04-12-2012, 06:15 PM
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also 10.5:1 compression
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Old 04-12-2012, 07:01 PM
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I assume you are using a carb and want to stick with a flat tappet cam? Or do want to spend the money on a roller cam?

Also, have you machined the valve guides down on the Vortec heads? If you have not/do not want to, that will limit the lift of the cam you can choose.

Is this really going to see the drag strip? Are you wanting a mild cam for MPG's or do you just not like an awesome sounding idle?

Car, truck? Manual, auto?
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Old 04-12-2012, 07:03 PM
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Also 10.5:1 SCR with a mild cam (aka small duration and early intake valve closing) is going to increase your cylinder pressure. So you might be pushing the limits of detonation. A more radical cam has a later closing intake valve (after BDC) and thus will bleed off some of that cylinder pressure and thus you will have less chance of detonation.
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Old 04-13-2012, 06:36 AM
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^^^X2,

and to give you some suggestions we need a little more information, ie; what car is it going in, what kind of gears are you running or do you plan on running, do you plan on changing to an aftermarket stall converter, what transmission are you running...
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Old 04-13-2012, 08:05 AM
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If you haven't chosen the heads yet, you don't know what your comp. ratio is as that is determined largely by what size combustion chambers you choose. Is this going to be a pump gas engine, iron or alum. heads, what rpm range ? need more info..

dave
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