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Speedy Bill
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1949-53 Ford Flathead Main Bearings

Specs
Sold in Quantity:
Set
Garage Sale:
No
Bearing Undersize:
.030"
1949-53 Ford Flathead Main Bearings
1949-53 Ford Flathead Main Bearings
1949-53 Ford Flathead Main Bearings
1949-53 Ford Flathead Main Bearings
1949-53 Ford Flathead Main Bearings
1949-53 Ford Flathead Main Bearings

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Details

Reviews

Q & A

What's in the Box

Speedway Motors has all the parts you need to rebuild your Flathead Ford V8, including these high quality main bearings. Precision built to the high standards demanded by today's rodders and restorers, these silicon bi-metal bearings are available in standard size, .010", .020", or .030" undersize.

  • Improves Crankshaft Finish: Silicon particles reduce/eliminate microscopic ferrite peaks on improperly ground/polished nodular cast iron crankshafts.
  • Wear Resistance: During engine operation, silicon particles round off crank journal high spots, reducing friction and related wear.
  • Improved oil clearance: Because of reduced wear, silicon bearings make it possible to maintain OE clearances over the life of the engine, which reduces operating noise, vibration, and excess oil flow.
  • Tolerance Control: All shells matched to ± .0001" vs. the competitions' ± .00025"
  • Temperature Threshold: Silicon bimetal material melts/flakes at 662° F vs. tri-metal at 365° F.
  • Corrosion Resistance: Defends against corrosion caused by unleaded fuels and moisture.
  • Environmentally Friendly: All KING silicon bimetal engine bearings are "Lead Free".
  • O.E. preferred material: Most O.E. engines today use and enjoy the benefits of silicon bimetal bearings.

Customer Reviews

Rated 5 out of 5 by 1 reviewers.
RATING BREAKDOWN
1 reviews
5 Stars
1
4 Stars
0
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

webbomeister
Verified Purchaser
Macon, Ga
Product Rating

great quality.............superior produ

March 01, 2015
I've never been disappointed with any of the items i've purchased from speedway............way out-of-the-way service!! Technical assistance has also been superb even tho' your survey specifically said to NOT write about this............Main bearing set was exactly what I was looking for!!
Pros:
  • superior
Yes, I recommend this product.
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9101536

Product Q&A

2 questions : 2 answers

1 answers

Hello; is it adaptable on french ford vedette 49 to 53 ? tell me ID, OD and width please thanks

Dominique
france
September 24, 2012

Hello; is it adaptable on french ford vedette 49 to 53 ? tell me ID, OD and width please thanks

Answers

September 26, 2012
John
The French blocks do accept many US flathead components. The 49-53 French blocks use the early crankshaft main bearings such as number 9101535 plus size, then they use the later rod bearings such as number 91015361 plus size. Recent information confirms that the French blocks will accept the US valve train components including the lifters. On the gaskets the French block uses the earlier gasket set for the lower and for the heads and gaskets uses the later 49-53. Our camshafts can also be used.
1 answers

Do you have Bearings for 1949 - 53 Sidevalve V8 Ford Motor. Main Bearings 30 thousand" under. Big end bearings 40 thousand" under. Piston rings 4ring 3 3/16th 30 thousand" over.

Sue Jones
Nelson, New Zealand
July 10, 2011

Do you have Bearings for 1949 - 53 Sidevalve V8 Ford Motor. Main Bearings 30 thousand" under. Big end bearings 40 thousand" under. Piston rings 4ring 3 3/16th 30 thousand" over.

Answers

July 14, 2011
John
Currently the Main bearings are only offered in STD, 10, or 20 undersize. Rod bearings are offered in STD, 10, 20, and 30 under. Our piston rings in 4 ring design are available for 3.248 or 3.313 bore size which is .060 and .125 oversize.
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Speedway Motors has all the parts you need to rebuild your Flathead Ford V8, including these high quality aluminum bi-metal rod bearings. Precision built to the high standards demanded by today's rodders and restorers, these insert-style bearings are available in standard size, .010", .020", or .030" undersize.

  •  Tolerance Control: ± .0001" vs. the competitions' ± .00025"
  • Superior Embedability: Material is much thicker than Babbitt overlays (.012" vs. .0008"). This provides greater macro-particle (> .0004" diameter) embedability. Macro particles are most responsible for scratching  crank journals & tearing/weakening babbitt overlays.
  • Temperature Threshold: Bi-metal withstands 662° F (350° C) compared to tri-metal 365° F (185° C). Affords greater protection against localized overheating due to misalignment, detonation, overloading, loss of coolant, etc.
  • Conformability: Minimum depth of .012" enables greater adjustment to bore or journal misalignment without causing bearing failure or journal damage.