Author Topic: 1" Bore x 1" Stroke Vertical I.C.  (Read 9867 times)

Offline kuhncw

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #225 on: April 04, 2021, 10:56:03 PM »
Kuhncw---That black thing on the end of the carburetor is a handle to turn in or out to richen or lean out the mixture flowing thru the carburetor.---Brian


Thank you, Brian.

Chuck

Offline Brian Rupnow

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #226 on: April 05, 2021, 09:51:40 PM »
THIS POST HAS BEEN TEMPORARILY REMOVED UNTIL I GET IT FIGURED OUT A BIT MORE.--APRIL 06-2021
« Last Edit: April 06, 2021, 11:17:17 PM by Brian Rupnow »

Offline Art K

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #227 on: April 06, 2021, 03:23:01 AM »
So the cam timing is advanced to far? I had that experience the first time I got my Upshur single running. It wouldn't run more than about 1000 rpm's. It was advanced 3 teeth to much by the time I got that sorted out. When I went to far it ran awful.
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Online Jasonb

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #228 on: April 06, 2021, 08:08:15 AM »
You could also back off the inlet pushrod adjuster a bit so the inlet does not open as soon due to increased lash. That way exhaust stays the same.

Does that commercial carb have an adjustable air bleed or similar? you should be able to adjust both mixtures to suit slow and fact running if it does.
« Last Edit: April 06, 2021, 08:17:29 AM by Jasonb »

Offline Bearcar1

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #229 on: April 06, 2021, 05:37:51 PM »
Or perhaps machine a new cam with a different profile. It could then be attached in and with the same attachment pin position as the original. I am most certain you will figure something out and it will be good.
 :wine1:


BC1
Jim

Offline gbritnell

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #230 on: April 06, 2021, 07:25:50 PM »
I think what you mean to say is the intake is open too long in the compression stroke, not the power stroke.
gbritnell
Talent unshared is talent wasted.

Offline Brian Rupnow

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #231 on: April 06, 2021, 11:52:55 PM »
George--You may have caught me while I was undergoing a "stupid attack." The more I read thru the sequence of valve events, the more confusing it becomes. I can understand a puff of air coming out of the carburetor if the intake valve opens too soon on the exhaust stroke. I can't really see the intake valve being open at all on the compression stroke.---Brian

Offline Brian Rupnow

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #232 on: April 07, 2021, 06:36:44 PM »
I reset the cam timing by retarding the action of the cam by about 4 to 5 degrees. That made a tremendous difference to the way the engine idled and responded to the throttle being opened.

Offline Admiral_dk

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #233 on: April 07, 2021, 07:16:37 PM »
Nice that you found a solution to the last bit too  :ThumbsUp:

Offline crueby

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #234 on: April 07, 2021, 09:30:50 PM »
That looks and sounds absolutely terrific!

Offline Brian Rupnow

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #235 on: April 07, 2021, 11:04:11 PM »
Thanks fellows. ---I'm glad that it runs as well as it does, and I'm looking foreword to some "not machining" time.--Brian

Offline Art K

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #236 on: April 08, 2021, 04:16:27 AM »
Brian,
Glad to see you got the cam sorted out. It runs great. Now, take a well deserved break!
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline Bearcar1

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #237 on: April 08, 2021, 06:29:18 AM »
 :ThumbsUp:  yes but we are all still waiting to see the happy dance video....   :pinkelephant: :pinkelephant: :popcorn: :popcorn:


BC1
Jim

Offline Brian Rupnow

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #238 on: April 09, 2021, 04:17:49 PM »
« Last Edit: April 10, 2021, 02:44:31 PM by Brian Rupnow »

Offline Brian Rupnow

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Re: 1" Bore x 1" Stroke Vertical I.C.
« Reply #239 on: April 09, 2021, 08:07:03 PM »
I have been asked about gaskets on this engine. There is a gasket 0.030" thick between the bottom of the cylinder and the crankcase. The head gasket is 0.030" thick. There is a gasket 0.015" thick between the two sides of the crankcase. These are simply standard utility grade gaskets, cut from rolls of automotive gasket material. Same material as would be used for fuel pumps, waterpumps, etcetera. I do not use a special grade of head gasket material anywhere on the engine.