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Search: Posts Made By: Jack Shaft
Forum: Model A (1928-31) 07-08-2020, 11:07 PM
Replies: 78
Views: 11,544
Posted By Jack Shaft
Re: Insert bearings

Ford made a number of improvements with B engine design to deal with the main bearing issues with the A.The most influential one was the mechanical advance distributor,taking engine timing from the...
Forum: Model A (1928-31) 07-06-2020, 04:53 PM
Replies: 78
Views: 11,544
Posted By Jack Shaft
Re: Insert bearings

https://i.imgur.com/CNxfyGj.png?1

Aluminum alloy bearing? they can delaminate as well. Torsional vibration on well supported and correctly applied poured bearings should be tolerated better than...
Forum: Model A (1928-31) 07-06-2020, 08:02 AM
Replies: 78
Views: 11,544
Posted By Jack Shaft
Re: Insert bearings

Standard insert bearings are of laminated construction, the babbit is applied to a base metal,usually copper or steel.With copper sometimes the copper is applied to steel,then the babbit is applied...
Forum: Model A (1928-31) 07-05-2020, 09:53 AM
Replies: 78
Views: 11,544
Posted By Jack Shaft
Re: Insert bearings

Spiral grooving and increasing clearance can have a negative effect on the oils ability to support the crankshaft.Modern oils have better load carrying properties,so opening the clearance to .002...
Forum: Model A (1928-31) 07-04-2020, 08:52 AM
Replies: 78
Views: 11,544
Posted By Jack Shaft
Re: Insert bearings

Technology has greatly aided the poured bearing process. Infrared temperature guns has taken the 'art' out of tinning and babbit pour temperatures.

The hydrodynamic principle requires adequate...
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