Brian Builds the Kerzel Hit and Miss I.C.

[Maryak]

Here's hoping because I have a funny feeling it will soon be my turn.

Best Regards
Bob

 

[zeeprogrammer]

Still got my fingers crossed Brian. You'll have this running soon.

 

[NickG]

Good luck Brian, it looks good to me.

 

[Brian Rupnow]

This morning I built two more valve cages. Why two??? Because I didn't heed my own advice about LIGHT press fit and the second one collapsed when I pressed it in. Needless to say, the third cage was a DAMN light press fit---(More of a coat it with Loctite and push it in with your thumb!!!) I won't know untill tomorrow evening if I have acheived a good seal between the new cages and valves, or if I have to now build new valves.

 

[doc1955]

If you are using loctite that is what I shoot for is a nice slip fit.
Believe it or not it takes more pressure to push a bushing out that has been put in with a slip fit and loctite then it does wit a press fit and loctite. The reason is if you look at the surface under a microscope you would see peaks and valleys when you press some thing in you shear off the tops and lose area for the loctie to grab and expand into. The only way around this is to shrink fit. With that process you need to super cool part being pushed into place.

Anyway I think it only a matter of time before you have things going your way.
Your build looks really nice can't wait to hear the put put put!
Good luck Brain!

 

[Lakc]

This is very interesting, as my first foray into caged valve construction is coming up soon. Looking good!

 

[Brian Rupnow]

Gentlemen---We have compression!!! I couldn't wait 24 hours so I helped the Loctite along with a heat lamp. The compression isn't great. Its nowhere as good as on the Webster I built last year, but its there. I went to a heavier spring on the exhaust valve, because it is mechanically actuated. I cut one coil off the spring on the intake valve, and it began to operate from engine suction. What you are seeing in the picture is #1--An adapter I made and screwed into the sparkplug hole so I could apply air pressure and listen for leaks with both valves closed. #2---A second adapter I made to screw into the carburetor port to hook an airline to. Once I got things to the point where the intake valve began to operate, I plugged the sparkplug airline (hence the pencil) and put the other line from the intake port into a can of light oil about 14" below the engine. When I ran the drill motor at a fairly low RPM, the engine created enough suction to lift the light oil 14" into the cylinder. (Of course this immediately blew the pencil out of the other line and sprayed oil all over my telephone and catalogues!!!) However, oil wipes up. If there is enough suction happening to lift oil 14", then there is enough suction to pull air/fuel mix into the carburetor and run. I'm ready to move on---I'm sick of screwing about with valves!!! Onward and upward---I'm going to try and build a carburetor, if I can find anybody in Ontario that will sell me one #2-56 brass screw 1/2" long.

 

[zeeprogrammer]

Congratulations Brian. Sounds like good progress.
But who are you calling 'Gentlemen'?

 

[Brian Rupnow]

Congratulations Brian. Sounds like good progress.
But who are you calling 'Gentlemen'?

Zee--We're all gentlemen here----aren't we???

 

[NickG]

well done Brian looking forward to hearing it very soon!

Nick

 

[Brian Rupnow]

Okay guys--I'm going to move on to a carburetor build. Since I have to make drawings for myself to build it, and I wanted a throttle on it (whether it gets used or not), I figured I might as well share with you folks. If it works, we're all ahead of the game. If it doesn't, then I'll try and explain why (when I find out) and will post any corrected drawings. To start out, here is the first part, the carburetor body.--It does get silver soldered to a second part.

View attachment CARBURETOR BODY.PDF

 

[Brian Rupnow]

And here is the part it gets soldered to---

View attachment CARBURETOR PART-2.PDF

 

[Brian Rupnow]

Here is the assembly drawing for the first two parts---

View attachment ASSY OF CARBURETOR BODY.PDF

 

[Brian Rupnow]

The needle valve screw---

View attachment CARBURETOR NEEDLE VALVE.PDF

 

[Brian Rupnow]

And the assembled needle valve---

View attachment ASSY OF NEEDLE VALVE.PDF

 

[Brian Rupnow]

The throttle itself---

View attachment THROTTLE SCREW.PDF

 

[Brian Rupnow]

And the full assembly of the carburetor--

View attachment ASSY OF CARBURETOR.PDF

 

[Brian Rupnow]

And after that valient effort, has anybody out there got a couple of #2-56 x 3/8" or 1/2" long brass shcs that they could volunteer to me? Nobody in Barrie sells them unless I order a box of 50 of them!!!

 

[kjk]

Would stainless suffice?

 

[Metal Butcher]

And after that valient effort, has anybody out there got a couple of #2-56 x 3/8" or 1/2" long brass shcs that they could volunteer to me? Nobody in Barrie sells them unless I order a box of 50 of them!!!

I have plenty of alloy 'steel' SHCS (socket head cap screws). I could send you what you need. Send me a PM if your interested.

-MB