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Old 06-12-2005, 04:23 PM
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383 Build Questions

I know i'm asking a 100 questions, but i need to pick some minds that know, your help is appreciated ! ok so far i've ask about a 350 build , and a 377 build, but now wondering about a 383 build.

info on P/U it's going in

not a daily driver or hwy cruiser, 71 Chevy P/U 350 turbo tranny with stall converter & 373s rears

when building a 383 theres some block work that needs to be ground away or clearanced for the rotating assembly correct ? just have that done when block is machined / bored ? they should know where & how much ? i plan on reconditioning my 350 rods, then take the new crank in the northern auto parts kit, with flexplate and my ballancer down to machine shop and have it ballanced ?

this will have prob a roller rockers & an Edelbrock RPM Performer intake and 76cc cast iron heads, headers

ok questions

1. should i run a new harmonic balancer ? this place rebuilds used ones http://damperdoctor.com/

2. what CR should i run ?

3. should i run a HV Oil Pump ?

4. below is whats in the kit, what cam would you run for this build (cams for this kit are listed below)

HP383KHWHypereutectic Piston W/Crank

Chevy 383 (350 Chevy using 400 crank & 5.7" rods) - HP383KHW Hypereutectic Piston W/Crank

Federal Mogul Seal Power,or Hasting Moly Rings

Federal Mogul Hypereutectic flattop Piston

Clevite Rod Brgs

Clevite Main Brgs

Clevite Cam Brgs

Melling or Sealed Power Hi volume Oil Pump

Crane Energizer Camshaft and Lifters

Cloyes TRUE Roller Timing

Pioneer Frost Plugs

Felpro Gaskets

New Scat Crank using 5.7 Rods
Make: Chevy
Model: 350 Blk, 400 Crank, 5.7 Rods

HELP Me pick a cam
Crane Energizer Camshaft #100032 1200-4200RPM 260dur .472lift 110 lobe sep

Crane Energizer Camshaft #100042 1600-4600RPM 266dur .444lift 110 lobe sep

Crane Energizer Camshaft #100052 2000-5000RPM 272dur .454 lift 110 lobe sep

Crane Energizer Camshaft #100172 2200-5200RPM 274dur .450lift 106 lobe sep

Crane Energizer Camshaft #100132 2400-5400RPM .467lift .110 lobe sep

Crane Energizer Camshaft #100082 2500-5500RPM 282dur .470lift 106 lobe sep

Crane Energizer Camshaft #100072 3000-6000RPM 284dur .480lift 112 lobe sep

Crane Energizer Camshaft #100182 3200-6200RPM 286dur .465lift 106 lobe sep

Crane Energizer Camshaft #100112 3500-6500RPM 302dur .500lift lobe sep

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Old 06-12-2005, 06:26 PM
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if you get a new crank and the the right rods you don't have to grind.if you have the machine shop do the other work,have them do the balancing and grinding because one will run into the other and you'll end up destrouing the balance job.its not that much and much simpilar if you let them do it even for me.if you don't know what you're doing its a must.
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Old 06-13-2005, 09:57 AM
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what CR should a 383 run ?

you said new crank & the right rods, were you talking 350 piston with a 400 rod (5.565) and 400 crank ? (what RPM will this setup turn ?)

or is this a better way, 350 rod (5.7) , a 400 crank and a special piston for a 383. (what RPM Will This Turn ?) and a little grinding on the rod bolt heads or grinding a small base circle in the block for clearance ?


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Old 06-14-2005, 09:53 AM
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I'd go with the 286 duration cam- you're stroke will give you the torque down low and with the increased displacement you're going to need the help up top. The 6200 rpm guideline for that cam will not hold true since you're stroking it. Also, what heads? I'd go Vortec- mostly cause its cheap and easy. Do some porting on the exhaust yourself, and if you know what you're doing, touch up the intake. Polish the combustion chambers and you could run a nice 9.5:1 on the cheap 87 octane- which is what I try to design my engines for. I've seen 10:1 work fairly well on a 383, but with a lager cam and in a more friednly car (Camaro's) In a truck I'd stick with 9.5.

That cam will probably put your peak power at about 5900 rpm- which I think is about perfect for a Saturday night stoplight racer with some gear.

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