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Old 12-17-2009, 10:43 PM
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383 Build questions

I'm wanting to build a 383 but there isn't a "real" machine shop here that can balance a rotating assembly. My question is Summit has a 350 block P/N SUM-150100 that is a 4 bolt that has been clearanced for a 3.75" stroke with a H beam rod. They also have a Scat kit with H beam rods that are profiled for strokers. With those plus a small base circle cam I shouldn't NEED to have anything machined or balanced right? I understand how you all feel about trusting the factory balance job but I havn't read anyone who has used one and needed to have balanced after checking. So If a guy had to could one build a 383 without a machine shop using those or similure parts?

Next question is that are Scat's 4340 I beam rods profiled too?

Anyone use a scat or eagle cast or forged balanced kit? Was there any extra clearancing or balancing needed to the kit itself?

I've not read anything about the cast eagle kits like P/N B13455L030 being profiled or anything to ease instalation. Actually pretty much I've only read that the Scat 4340 H beam rods are clearanced.


Was also looking at the powerhouse kits ($470) but the cast one has cast pistons! Seems crazy?!?

I'm shooting to keep it under 500hp so cast would be fine. I do like the idea of no worries with the Forged..

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Old 12-17-2009, 11:02 PM
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oh yeah h beam has 7/16 cap screws on scat forged kits...
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Old 12-18-2009, 12:13 AM
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I'd use Scat over the Eagle parts. Better quality.
The Scat Rods with CapScrews are profiled, 3/8" & 7/16". You could go with the Scat9000 Cast Steel crank, 4340 Forged I-Beams and Hyper or Forged pistons.
Scat 383 Info >> http://www.gofastnews.com/board/tech...le-budget.html
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Old 12-18-2009, 07:19 AM
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FWIW, Competition Products has their latest broom sheet (discounts) out and SBC Dart blocks w/cast caps are $200 off, $300 off splayed steel capped blocks.

Also: HOWARDS CRANKS
TrackSmart American 4340 Cranks All in Stock...$200 OFF! ($495.00 each...nonprofiled)

HOWARDS RODS
Dense Forged 4340/ARP 2000 Cap Screws. SB Chev 6.0. Over $250 OFF!...$377.97 set

Heads........................SB Chev Pro Topline Iron Lightning 180,72 CC, Angle, 2.02/1.6....#223200080A.......$390.00 pr
etcetera
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Old 12-18-2009, 07:49 AM
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With no machine shop in sight, then you might be better off getting a complete short block. Lots of venders out there. you may find a 406 for about the same money.
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Old 12-18-2009, 08:01 AM
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here is a 500hp 406 build. they used a short block from Coast High Performance. they said the price was 2358.00 in the article but didn't see it on coast's site.???

http://www.coasthigh.com/Chevy-383-s...cks-s/1222.htm

high torque vortec build (535 ftlbs, 439hp).
http://www.chevyhiperformance.com/te...que/index.html

high hp build with afr heads (525ftlb, 490 hp, 87 octane).
http://www.chevyhiperformance.com/te...ild/index.html
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Old 12-18-2009, 08:17 AM
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with no shop in sight a mail order short block is probably your best option. The only real cost difference will be shipping, so its not that bad of an option.
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Old 12-18-2009, 08:21 AM
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