Product Summary

4.125" Engine Stroke, H-Beam Connecting Rod Type

  • Will fit 1939-1953 Ford flathead 286 c.i. engine
  • Kit includes new Scat crankshaft, new Scat H-beam connecting rods with 2" journals, premium forged three-ring pistons, rod bearings, and piston rings
  • Components are balanced and ready for you to assemble
  • Pistons are constructed from forged aluminum and have a flat top style
  • Engine stroke measures 4.125"

Comes as a Kit

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Key Specs

BrandScat
Connecting Rod TypeH-Beam
Piston StyleDome
Piston MaterialForged Aluminum
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Details

These 1939-53 flathead stroker kit rotating assemblies feature new Scat crankshafts, new Scat H-beam connecting rods with 2" journals, premium forged three-ring pistons, rod bearings, and piston rings. The components are balanced and ready for you to assemble.

Main bearings sold separately. If you have a 39-48 engine you will need a set of 9101535-STD main bearings. A 49-53 engine will require a set of 9101536-STD main bearings.

Item Details

3-5/16" bore
4-1/8" stroke

Specifications

KEY SPECS
BrandScat
Connecting Rod TypeH-Beam
Piston StyleDome
Piston MaterialForged Aluminum
GENERAL
Engine Stroke4.125"
Rod Journal Diameter2.000"
Sold in QuantityKit

Ratings & Reviews

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5.0

12 years ago

sjarnecke

Davenport, IA, USA

have not fired yet ... but this rotating assembly kit is exactly what I needed and saved tons of time and money. Thanks Speedway!!!

Would Recommend

Showing 1 of 1 reviews

Questions & Answers

7 Questions • 8 Answers

Is this compatible with the Isky Max-1 cam 249 duration, or should a different cam be used? Use is general street use, not racing. My rebuild is including the Stainless valve kit (single spring), Isky Max-1 cam (currently), standard flow oil pump. Looking at this crank due to the 4" stroke being on backorder.

by Michael

• 5 years ago

1 answer

When this assembly is fitted with Edelbrock heads, should the 65cc or the 74cc chambers be chosen for reliable road use? Thankk you for your help.

by Flatty

• 9 years ago

1 answer

Are the rod bearings "full floating" as in stock 39 to 48 flathead? Is any block or pan mod needed to clear the 4.125" stroke. This engine is going into a 1941 Ford which uses a crank mounted fan. Will this crank accept the '41 crank pulley with the fan attached? About two years ago there were some complaints about SCAT cranks being delivered way out of balance. This kit is advertised as balanced rotating assembly. Is it? And if so to what specifications for pistons, rods, crank? Does the SCAT crank have the trash collecting galleys that stock cranks have? Important because I will not be using an oil filter. What is the lead time for delivery?

by DaveR

• 9 years ago

1 answer

What compression ratio is this kit designed for?

by Bbymike

• 10 years ago

1 answer

Hi! I am rebuilding a 1933 Ford Four Door with a 21 stud flathead. It should be from 1935 or 1936 water pumps mounted in the heads. Is this kit also for my engine avaible? thanks Bernhard

by Bernhard Steiner

• 10 years ago

1 answer

What type of piston rings come with this kit? Metric moly rings or standard?

by bored&stroked

• 11 years ago

1 answer

Sorry I am from South Africa, 5/16 bore? does that mean my bore would be 3,3125 inch or 125 thou over standard?

by Runflat

• 11 years ago

2 answers

7 of 7 questions shown

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