440 Source MELONIZED intermediate shaft gear

[lewtot184]

The design helix on the cam gear and intermediate shaft are designed for downward thrust. Any vertical thrust would damage the distributor. To verify this all one has to do is look at the thrust surface on the bushing. I fell for the vertcal thrust thing years ago and did the collar on the distributor shaft. If by chance the intermediate shaft is climbing it's probably a bad bushing. The oil pump does create a wobble on the shaft because of the gerotor design. Unfortunaetly the little bushing has to carry that wobbling force which gets worse as oil pressure is increased.

 

[andrewwoz]

The shaft/gear will move up, the problem when it moves up is what happens to the cam gear riding along side it

Would the distributor be out of time once it moves up as well?

 

[mopardemon]

The design helix on the cam gear and intermediate shaft are designed for downward thrust. Any vertical thrust would damage the distributor. To verify this all one has to do is look at the thrust surface on the bushing. I fell for the vertcal thrust thing years ago and did the collar on the distributor shaft. If by chance the intermediate shaft is climbing it's probably a bad bushing. The oil pump does create a wobble on the shaft because of the gerotor design. Unfortunaetly the little bushing has to carry that wobbling force which gets worse as oil pressure is increased.

Would the distributor be out of time once it moves up as well?

distributor wont be able to move held in by bracket

 

[andrewwoz]

distributor wont be able to move held in by bracket

I was thinking if the gear was able to move up and still be meshed with the gear on the cam it would not be timed the same due to the gear being helical. Like when you drop the gear in and it rotates as it meshes with the cam gear

 

[lewtot184]

I was thinking if the gear was able to move up and still be meshed with the gear on the cam it would not be timed the same due to the gear being helical. Like when you drop the gear in and it rotates as it meshes with the cam

i believe you are correct. the timing should retard if the gear is moving up; been thru this before.

 

[andrewwoz]

Using this rudimentary method with cheap calipers, here are some dimensions:
Melonized gear: 1.548"(Gear height) - .170"(depth) = 1.378"
Bronze Gear: 1.548"(Gear Height) - .168"(depth) = 1.38"
This is the best I can do with what I have in easy reach.

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Copying this method with the Hughes shaft/gear

Hughes melonized 1.540" (gear height) - .140" (depth to top of slot) = 1.400"

Also measured the depth from the top of the gear to the bottom of the slot which came to .439"

 

[mopardemon]

is yours angled inside where the slot is

 

[andrewwoz]

is yours angled inside where the slot is

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The gear has a small chamfer, the shaft/slot does not.

 

[mopardemon]

do you see the difference between the two, still waiting for 440 source