383 Short block questions

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Nov 9, 2004 | 02:26 PM

Script917

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383 Short block questions

I was looking at strokermotor.com and found a few 383 LT1 short blocks. Here is what they have.

• Crank: New SCAT Cast Steel 3.750 Stroke 1pc rear seal
• Pistons: Keith Black Flat Tops 10.5 CR
• Rods: Scat 4340 Steel I-Beam, 6.0 w/ 7/16 Bolts
• Bearings/Rods & Mains: Clevite 77 'P' bearing
• Balancer/Pulley: Pioneer OEM elastic style 7" diameter
• Flywheel: SFI approved, 153 teeth
• Balance Job: High performance street/strip,
• Piston and rods matched +- 2 grams
• Please note that this kit sometimes need heavy metal when we balance it. This costs Extra.
$1,320.00

• Crank: 4340 Nitrided Steel 3.750 Stroke 1pc rear seal
• Pistons: SRP Flat Tops 11.1:1 CR
• Rods: Scat 4340 Steel I-Beam, 6.0 w/ 7/16 Bolts
• Bearings/Rods & Mains: Clevite 77 'H' bearing
• Balancer/Pulley: Pioneer SFI approved steel 6 3/4" diameter
• Hub: Crankshaft flange hub for above balancer/pulley
• Flywheel: SFI approved, 153 teeth
• Balance: High performance street/strip,
• Piston and rods matched +- 2 grams
• Please note that this kit sometimes need heavy metal when we balance it. This costs Extra.
$2,120.00

Should I avoid a Cast crank? If im building a 383 stroker with heads and cam hoping for around 450+hp. Will that cast crank cut it?

Also what is the max compression I can safely run with premium 91 octane fuel?

Nov 9, 2004 | 03:47 PM

GMC71k20

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those are just rotating assemblies, not an assembled short block

Nov 9, 2004 | 03:53 PM

Script917

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What exactly is a rotating assembly?

I know it’s a dumb question.

Nov 9, 2004 | 03:59 PM

LawmanSS

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"Rotating Assembly" usually denotes crankshaft, connecting rods, pistons, rings, and bearings...and in the case of those listed, flywheel and balancer.

Nov 9, 2004 | 04:07 PM

97M6Formula

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Quote:

Originally Posted by LawmanSS

"Rotating Assembly" usually denotes crankshaft, connecting rods, pistons, rings, and bearings...and in the case of those listed, flywheel and balancer.

What he said so basically you would still need main caps and a few minor things for a complete shortblock as well as the machining done to your block APE is having specals right now on lt1 forged short blocks I would give em a call I got a good deal

Nov 9, 2004 | 05:44 PM

Snow Dog

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either one of those setups will work on 91 octane. the cast crank will handle 450 horsepower no problem. its the roms that you will have to wrry about. 6500 will be fine too with the cast crank

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