HarleyTechTalk

Pretty neat idea from Randy Torgeson of Hyperformance. Two lifter cavity block offs so that the piston oiler operation can be tested when the motor is assembled. I have no idea on price, but I'm sure a call to Randy would answer that question. Hyperformance Web Site

It appears each fixture replaces the lifters allowing the pressure coming into the case to go to the piston oiler without loss. You would look for opening at 10 to 13 PSI and full open at 18 to 20 PSI. Meaning the pressure should not go over 20 PSI if the oiler is opening correctly. I guess the downside is you also have to rely on hearing when the air is escaping the oiler rather than seeing it with a bench tester.

The bottom image is from a TC service manual, and shows the ports #13 and #14 as where you introduce air pressure to test the piston oiler.   

This is pretty cool and will also allow those passages to be blown out prior to attaching the oilers to the case. Surprised this was not invented a long time ago.

The next step would be a fixture that allowed a set of leak down gauges to be attached to the case.

Yeah I was thinking an old cam plate could be the base of that connection. Or even machine a block that can bolt to the case, then add your gauges.

140$ ordered a set. Now to figure out the best method to introduce the air into ports 13/14. I've got a few cam plates laying around that would be a great starting point. I'll post when it's done.

I think the easiest way is to use some aluminum, drill four mounting holes in it to mate with four screw holes for the "cam cover" and not use the cam plate mounting screws.

Then drill two blind holes that align with oil ports #13 and #14, and add a recess for two o-rings to seal the air flow. Then drill from one end a hole that intersects with the two oil port holes, and this will also be the entry for air pressure.
Drill and tap the front side of the two oil port holes to allow air line hookup.

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Smart! I'll post it after it's done. Thanks

Testing should be 1 squirter @ a time, so cross passage isn't useful, is it?

Quote from: rigidthumper on September 13, 2024, 04:30:17 AMTesting should be 1 squirter @ a time, so cross passage isn't useful, is it?

You are correct.   

I can fix that.

Quote from: Wookie3011 on September 13, 2024, 02:38:16 AMSmart! I'll post it after it's done. Thanks

Make sure to look at the model again, I removed the cross drilled port.

Still mocking it up. Good catch Robin! Took me and my Blonde heritage more time than perhaps normal to see it. 

I'll post on what I come up with.

One additional note is to make either a through hole or a recess to allow space for the alignment bushing for the cam plate.

Normally I would have put out dimensions with this, but I really don't have a plan to make one, and it needs to be laid out with a right side case for accuracy. If you have the means any mill with a DRO will give you all of the drilling points C/L to transfer to a drawing and layout of the aluminum block.


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