Thread: building 383 sbc

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I am building a 383 sbc (010) block bored .030 with speed pro powerforged flat top pistons with 2 reliefs 11.5 or 12.1 cr .039 felpro head gaskets, eagle 3.75 crankshaft with eagle 5.7 rods, arp rod bolts, balance rotating assembly, ZZ4 GM performance 210cc aluminum heads 2.02 int. 1.60 exh. 58cc chambers, comp cam hyd. 244 244 @ .50 510 510 lift 108 lobe center, crane 1.5 roller rocker arms, crane 1.565 double springs, 7/16 screw in studs and 3/8 guide plates, crane stud girdles, double roller timing chain, world performance high rise single plane intake, holley 750 duel feed carburtor, what HEI distributor to run and what advance should be used, how much hp and torque will this make, thanks Bill

Hi Bill, if you'll detail some of the parts for me, I'll run it up on a DynoSim....I'll need....
1. piston part number or valve relief cc's
2. head flow, intake and exhaust, from 0.100" through 0.600".
3. piston deck height
4. camshaft part number
5. intake manifold part number
6. head gasket bore or gasket part number

As far as what HEI to use, I like the Davis Unified Ignition (DUI) distributor. They produce a quality product and will tailor it exactly to your combination of parts. You're using a pretty healthy cam, so the chart from Barry Grant suggests 20 degrees at the crank. If the heads are fast burn, I'd use another 14 degrees at the weights for a total of 34, all in by 2800. For the vacuum advance, I'd install a Crane 99600-1 vacuum advance kit and a Crane 99619-1 limiter plate if it doesn't come in the 99600-1 kit. There has been some confusion about this.
http://www.performancedistributors.com/gmssdui.htm
http://www.summitracing.com/parts/CRN-99600-1/
http://www.summitracing.com/parts/CRN-99619-1/

thepistons are speed pro powerforged flat top w/2 reiefs 5 cc #844-L2491-30,GM performance heads are 210 cc int. w/ d shape ext. 58 cc chambers that been milled .010 for clean up dont know thw cr sense they been cut,and have not been flow tested,added the 202 int. an 160 exh. valves they were ZZ4 aluminum heads #10088113, stock deck height,the cam was a crane #270-WG-1064R 234/244 @.050 -488/510 lift, intake # 955-061040 / 4150, head gasket are felpro #1003 4.100 bore .041 thick, see what it will come out to be, thanks Bill

I check the flow numbers at .100 lift int.63-exh.52.6,.500 lift 230.3 int. 180.2 exh., .600 lift 248.2 int. 189.2 exh. these are the flow number for the heads

Here are some pictures of the engine, I still have to install the stud girdles and intake bolts and a few more items, Later Bill