Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
Instruction Sheets for Part Number HPE-SP108
ATK High Performance Chevy 632 Short Blocks
Engine Assembly, Short Block, Big Block, 10.3L/632, 4.600 in. Bore, 4.750 in. Stroke, Forged Pistons, Flat Top, Chevy, Big Block Mark IV, Each
See More Specifications
|
Check the Fit
Estimated Ship Date: Feb 2, 2027 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
SP108
Part Type:
Product Line:
Summit Racing Part Number:
HPE-SP108
UPC:
00653517725128
Crate Engine Family:
Chevy Big Block
Actual Engine Displacement:
10.3L/632
Rear Main Seal Style:
2-piece
Crankshaft Material:
Forged 4340 steel
Piston Material:
Forged aluminum
Short Block Piston Style:
Flat top
Connecting Rod Material:
Forged 4340 steel
Connecting Rod Beam Style:
H-beam
Engine Block Material:
Cast iron
Main Bolt Style:
4-bolt
Main Journal Type:
Chevy 454
Deck Height (in.):
10.200 in.
Engine Balance:
Internal
Oil Pan Included:
No
Timing Cover Included:
No
Harmonic Balancer Included:
No
Flexplate Included:
No
Flywheel Included:
No
Assembled:
Yes
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Compression options range from 10.6:1-11.3:1 depending on deck height and gasket thickness.
ATK High Performance Chevy 632 Short Blocks
ATK High Performance Chevy 632 short blocks are based on dyno proven combinations built with name brand parts. Each short block is hand-built and inspected for precision tolerances. Rotating assemblies are balanced; and stroker builds are oversize of stock bore and stroke. Short blocks are shipped strapped on a wooden pallet crate.
Engine Specifications:
* Block: Dart Big M Sportsman 4-bolt main 2-piece rear main seal
* Bore/Stroke: 4.600 in. x 4.750 in.
* Displacement: 632CI
* Crankshaft: Scat 4340 forged internally balanced
* Rods: Scat 4340 forged H-beam with ARP 8740 bolts
* Pistons: 2618 forged +3.4cc flat tops
* Compression ratios: 112cc = 11.3:1 / 118cc = 10.8:1 / 121cc = 10.6:1 (can vary due to deck height/gasket thickness)
* Rings: Plasmamoly
* Camshaft bearings: Dura-Bond, installed and clocked to OEM position
* Freeze plugs: Brass, installed and sealed
* Oil galley plugs: Installed and sealed
Recommended Components:
* Balancer: Internal balance
* Flexplate / Flywheel: Internal balance
* Head gasket: .038 in. or per application
Engine Info:
* Oil: 10W30 Conventional / Non-Synthetic for first 3,000 miles
* Oil filter: Wix or K&N per application
* Head gaskets: .038 in. or per application
Applications
Loading...
Loading...
Questions & Answers
Ask a Question
What type of question would you like to submit?
I have a Customer Service question
(order, shipping, returns, protection plans, etc.). Customer Service Question
(order, shipping, returns, protection plans, etc.). Customer Service Question
- OR -
I would like to ask other customers
a question about this Product. Product Related Question
a question about this Product. Product Related Question
Loading...
Reviews Write a Review
Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
Modal Header
Call To Order
This is a custom order part. You can order this part by Contacting Us.
Email this page
