zac83
20+ Year Contributor
- 257
- 0
- Dec 24, 2002
-
Yelm,
Washington
Just though I would take a shot at a fix for the dreaded crank walk.
clutch pressure is a quite obvious cause of crank walk (proven in MANY performance engines... IE: fords windsor block with a heavy duty performance clutch)
Here is how I think one can combat crank walk when rebuilding an engine. Form a hydrostatic wedge on the thrust surface of the bearing. This is acomplised by drilling a hole though the side of the top main girdle and making a matching hole in the actual bearing. a gouge will then be placed along the thurst surface of the bearing. This will be done on the side facing the flywheel. This will allow a hydrostatic wedge to be formed between the crank thrust race and the main thrust bearing. This wedge will push oppositely of the force that the clutch fork creates. This is a trick that has proven itsself in use with dirt track and many other performance motors. Here is a chicken scratch illustration of what i purpose.
Dont know if anyone has had this idea yet, I was just talking with my machnist and this is what he plans on doing for my 90 block.
Any constructive criticism is welcome.
clutch pressure is a quite obvious cause of crank walk (proven in MANY performance engines... IE: fords windsor block with a heavy duty performance clutch)
Here is how I think one can combat crank walk when rebuilding an engine. Form a hydrostatic wedge on the thrust surface of the bearing. This is acomplised by drilling a hole though the side of the top main girdle and making a matching hole in the actual bearing. a gouge will then be placed along the thurst surface of the bearing. This will be done on the side facing the flywheel. This will allow a hydrostatic wedge to be formed between the crank thrust race and the main thrust bearing. This wedge will push oppositely of the force that the clutch fork creates. This is a trick that has proven itsself in use with dirt track and many other performance motors. Here is a chicken scratch illustration of what i purpose.
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Dont know if anyone has had this idea yet, I was just talking with my machnist and this is what he plans on doing for my 90 block.
Any constructive criticism is welcome.
