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#9151274
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400 mains Main Journal Style, 3.875" Engine Stroke
| MFG. Part # | Select Oversize |
| Cylinder Bore Size | Select Oversize |
| Connecting Rod Type | H-Beam |
| Piston Style | Dome |
| Piston Material | Forged Aluminum |
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Return PolicySpeedway introduces forged rotating assemblies, with an optional balance job. Includes new 2-pc rear main seal crank, rods and pistons. Cranks are new so they use standard size bearings.
All Scat 4340 cranks are 2-piece rear main seal, internally balanced and weigh approximately 51-55 lbs. All balancing is done with our state-of-the-art Hines balancer by race mechanics with over 30 years of experience! A kit purchased with the optional balance job will ship in 24-48 hours (must be purchased separately, part # 91510201). These rotating assembly engine rebuild kits may require additional charges for heavy metal.
If you are going to run this crank in a sprint car motor, you must have the crank flange turned down prior to balancing the crank to allow it to go through the motor plate.
NOTE: Piston rings are not included and must be purchased separately. Use Style E rings.
64 cc 14.0:1 compression ratio
Kits feature:
Kits feature:
Application
| KEY SPECS | |
|---|---|
| MFG. Part # | Select Oversize to see |
| Brand | Speedway Motors |
| Cylinder Bore Size | Select Oversize to see |
| Connecting Rod Type | H-Beam |
| Piston Style | Dome |
| Piston Material | Forged Aluminum |
| GENERAL | |
| Main Journal Style | 400 mains |
| Engine Stroke | 3.875" |
| Connecting Rod Length | 6.000" |
| Connecting Rod Material | Forged 4340 Steel |
| Connecting Rod Weight | 634 grams |
| Connecting Rod Bolt Diameter | 7/16" |
| Piston Diameter | Select Oversize to see |
| Dome Height | 0.283" |
| Piston Weight | 427 grams |
| Piston Ring Style | E |
| Crankshaft Material | Forged 4340 Steel |
| Rear Main Seal Style | 2-piece |
| Wrist Pin Diameter | 0.9272" |
| Main Journal Diameter | 2.650" |
| Rod Journal Diameter | 2.10" |
| Bearing Construction | Bi-metal |
| Bearing Undersize | Standard |
| Narrowed Bearing | Yes |
| Coated Bearing | No |
| Sold in Quantity | Kit |
4 Questions • 4 Answers
Do you have this kit with a higher compression pistion
by Mr. Xcitment
• 7 years ago
1 answer
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Is this available with a 350 main crankshaft? If so, which balance service would be used?
by Mod9
• 9 years ago
1 answer
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Do the pistons have a big enough valve relief to work with brodix track 1 heads? my intake valve size is 2.080
by mike
• 11 years ago
1 answer
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what compression will i get with a 64cc cyl. head and what horse power est. with a cnc ported cyl. head and around a .600 lift cam
by skeets
• 11 years ago
1 answer
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