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Old 01-07-2013, 07:07 PM
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383 Build

Hello,new to the group and looking into building my first 383. I have a 1972 Nova street car. The set up i am looking at is the Eagle cast kit with flat top 5cc pistons. The car has a 3.55 gear and turbo 400 trans. I plan to use Dart Pro 1 64 cc chamber 215 cc intake runner heads. Should be around 10 to 10.5 comp ratio. Edelbrock RPM Airgap intake, i will get a stall to match the cam. What i'm not sure about is a cam and the Eagle cast kit. Should i go with forged pistons and a steel crank? The local machine shop said they see alot of the cast cranks break and the hyper pistons are junk. Is this true or do you think their trying to just sell the better kit? They sell the eagle brand products.

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Old 01-07-2013, 07:16 PM
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Depending how hard ur going to turn this motor a cast crank will be more than enough defiantly do a good forged piston and rod.
I wouldn't consider an eagle crank personally scat is the way to to go they make an awesome cast crank and u will go a long way to break these cranks know a lot of people running them in there dirt cars great
Prices especially there rods.
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Old 01-07-2013, 07:30 PM
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Is this more of a street or track car? What fuel do you plan on running? CR is going to be higher than 10-10.5:1. 215cc heads are a bit large unless this is a track/rpm motor. I would do like a 12-16cc dish for pump gas and 180-195cc heads if mostly street.
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Old 01-07-2013, 07:32 PM
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Some people have told me the scat cranks are harder to balance. I know everyone is gonna say something differant. Thats why i joined to get input from someone whos got a 383 or built some. I dont plan to go over 6500 if that much on rpm's just looking for a good street motor no dragstrip visits planed.
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Old 01-07-2013, 07:32 PM
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I have used several Scat cranks/rods, good stuff. I cannot comment on Eagle,never used thier products.
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Old 01-07-2013, 07:34 PM
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What all do you have now for parts?
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Old 01-07-2013, 07:35 PM
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It is a street car plan to run 91 gas maybe mix cam2 at times. But mainly a good hot street set up.
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Old 01-07-2013, 07:37 PM
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I have not ordered anything yet, everyone keeps telling me differant stuff. All i have now is a 4 bolt block ready for the machine shop.
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Old 01-07-2013, 07:45 PM
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Here are 108 dyno-tested small block Chevy street motor builds. Look through them and find what you want, then you can discuss tweaks to the builds with us members.
Ryan's Small Block Chevy Stroker Engine Combo Page

A 383 with 64cc heads and 5cc pistons will be 11.1:1 static compression ratio. Too high for pump gas. Use 9.5 MAX with iron heads, 10.5 MAX with aluminum heads. Don't reach out in thin air and choose a camshaft without matching it to the SCR that you end up with.

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Old 01-07-2013, 08:00 PM
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you have not really expressed the performance goals,or engines purpose. A 200 cc head is plenty for over 500 HP using a hydraulic roller and 9.5:1 CR
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Old 01-09-2013, 11:06 AM
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as Tech 1 said, the CR with -5cc pistons and a 64cc head will be 11.0-11.2:1, I have used Eagle cast cranks and their 5140 rods before with no problems turing around 6000rpm (2 different motors, nevery any rot assy issues). I have also used Scat 9000 steel cranks and their 4340 rods and had no issues. I still have a Scat 9000 3.75 crank, 4340 5.7 rods, and KB 18cc dished pistons sitting in my garage from a previous build that once I cleaned them up a bit they still look brand new, and that is with 6-8K miles on them and around 100 passes on them. For the typical hot rod street use either one will do just fine. I

As for "hyper" pistons, I have used mulitple Keith Black hyper pistons, and again I have never had any issues with them. If you are looking for easy streetability, low maintenance. I would suggest getting a either brand kit with the Keith Black hyper 18cc D dished pistons. With the proper .038-.046" quench, 18cc dish, and 64cc heads you will be right around 9.5-9.6:1 compression.

Now as for the cylinder heads, if all you are looking for is a nice street engine (est 425-500hp) then I would not recomend the pro-1 215's, especially not with 3.55 gears, since you will need to pick a cam to match your gears (along with other things). I would recomend either Dart iron eagle platinum 200cc heads if you want to stick with iron heads (cost could be a factor) or with a set of 190-200cc alm heads from one of the major head manufactures. My personal favorite is Dart, but AFR and Brodix are very good as well. Brodix even makes an alm head ment for lower budget builds, these are their IK series. As Tech 1 said, you can get away with more compression on an alm head so if that is the route you plan to take then you could take advantage of this and gain a bit more power buy going with Keith Blacks 12cc dished pistons. Wtih proper quench, 12cc dish and 64cc heads then your will be around 10.2-10.3:1 compression (of the top of my head).

Going strictly on the idea that you are using a 3spd automatic transmission and that you dont plan on changing out those gears for something a bit shorter, as well as the fact that you mentioned that you want a street vehicle (I'm making assumtions here), I would recomend a hyd roller cam with around 225-235 @ .050 which should have around .500-.550". With this cam you will need to get around a 2500-3000 stall (i would go with that later). Also a dual plane intake (ie performer rpm...) and I would suggest using a 750cfm vac secondary carb since it will be a little more user friendly and in my opinion would be the best choice for a street engine.
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Old 01-09-2013, 07:19 PM
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I will check the link out thanks
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Old 01-09-2013, 07:29 PM
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The main goal is a good strong street motor. Restoring a 1972 SS Nova like my Dad had when i was a kid. Not going racing with this car want it to be street friendly. I have a 1969 Chevelle with a built big block for racing and working on. Plan on driving this car on pump gas not cam2. Thanks for all the input so far.

Last edited by Nova SS72; 01-09-2013 at 07:30 PM. Reason: spelling
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Old 01-09-2013, 07:34 PM
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you do not need 215 cc heads for a mild street car
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Old 01-09-2013, 07:52 PM
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The biggest reason i was looking at the 215 Dart Pro 1 is the local machine shop was pushing them. I will probally end up getting the parts from another source, i think they are just trying to sell some stuff.
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