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Post by magnumed on Dec 4, 2013 9:11:37 GMT -6
What size motor came out of it ?? We are looking for a 440 S-3. We would probably take the seat off your hands too. I have a 73 440s-3 if you are still looking. |
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Post by rupp838485 on Dec 5, 2013 20:00:05 GMT -6
Rupp 1967 to 1973 Distance between Clutch Sheave Rims is 2 1/8 inches. except on the 1971 600 and 800 magnums where it it is 10 1/2 inches center to center. I measured our 1973 nitro with the 340ss with 94 duster and it is 2 1/8 to the secondary clutch.
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Post by Ruppsforever on Dec 8, 2013 14:31:22 GMT -6
Ed, PM me the price of the motor and I'll let my dad know. He's never on the computer anymore since he retired. Is it possible to get it to Eagle River Vintage Weekend ?? Thanks
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lobo
Senior Member
Posts: 58
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Post by lobo on Jan 4, 2014 22:02:58 GMT -6
So have the engine in place, the clutch, and a Donaldson muffler. Having trouble fitting the header exhaust pipe to the muffler and getting things to fit. What about using a flex pipe? Can a flex pipe work or will it just kill all the power on a 340ss? I thought it was the length of the pipe that mattered , not its curves or shape (other than diameter).
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Post by ruppluver on Jan 4, 2014 22:32:26 GMT -6
On the models with the sleeve in aluminum cylinder,use 45mm diameter exhaust pipe 400mm long.Muffler number to be used is:1473026000.
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lobo
Senior Member
Posts: 58
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Post by lobo on Jan 7, 2014 21:40:53 GMT -6
It's alive ! Fires and runs.
Hoping to race this Saturday. Pictures to follow.
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lobo
Senior Member
Posts: 58
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Post by lobo on Jan 10, 2014 21:32:06 GMT -6
Hood from Bill turned out nice.  But how do I attach the windshield? Do I have to cut it to make tabs and cut holes in the hood?  |
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lobo
Senior Member
Posts: 58
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Post by lobo on Jan 10, 2014 22:42:52 GMT -6
Never mind. Figured it out.
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Post by lemans1955 on Jan 14, 2014 13:11:45 GMT -6
Nice hood! Did bill paint it too?
Was thinking about putting one piece hood on my American.
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lobo
Senior Member
Posts: 58
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Post by lobo on Jan 14, 2014 19:08:43 GMT -6
Yes, had Bill paint it for me. Very light. Sled was running but I got crushed in our race.  Now I need the Rupp Nation's help to make this thing fast. Gearing advice? Spring combination for the clutch? Any Sachs engine gurus close to the twin cities? |
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Post by chrisb7882 on Jan 15, 2014 4:31:51 GMT -6
Your sled looks real nice and those suits are priceless  keep up the good work. Chris Attachment Deleted |
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Post by rupp838485 on Jan 18, 2014 8:34:18 GMT -6
I have alot of questions maybe I can help you out. 1.Clutching what are you running and what hole is your secondary in? 2.Exhaust? 3. Track? 4.Carb 5.Gearing? What is your ss bored to and what is the timing set at? PM me and I will help you out.
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lobo
Senior Member
Posts: 58
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Post by lobo on Jan 26, 2014 19:37:20 GMT -6
Sorry about the delay, was knocked out for a week with the flu. All help is appreciated. Duster 94 clutch Rupp clutch from a 293 1973 Rupp Nitro, black spring, set on notch 4 Tillotson HD 13a carb Stock 73 Nitro suspension and track Have not checked timing yet on the Sachs 340ss Donaldson muffler, flex pipe from engine to muffler Do also have a 76 Magnum suspension and track, could this be used in place of the 73 Nitro suspension? Gearing has not been checked or touched, stock for a 73 Nitro 293      |
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Post by rupp838485 on Jan 27, 2014 19:51:24 GMT -6
I will try to get pictures of our 1973 Nitros with the Sachs in them. I am getting our sleds ready for the Alex race. 1974 Nitro II 340, 1974 Nitro II 440, 1975 Nitro 340F/A and my 1973 Nitro with a 290ss. Thanks
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lobo
Senior Member
Posts: 58
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Post by lobo on Jan 27, 2014 21:31:36 GMT -6
Ok, so fixing the Sachs 340ss fan since my tether cord came loose and in a one in a million shot slipped into the fan and shattered the fan.
Think I have the gear ration figured out, a big reason why things were not as fast as planned. Going to improve the pipe/exhaust a bit. Still could use any advice on clutching though.
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lobo
Senior Member
Posts: 58
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Post by lobo on Mar 1, 2014 9:02:39 GMT -6
Was working on the gearing. Opened the chaincase. What is this?  |
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Post by sprintmania on Mar 1, 2014 12:57:10 GMT -6
your chain tensioner, it rotates to loosen or titian, lightly with a brass punch or plastic tip hammer tap on the tab and the chain will slack if you get no results tap the the three bolts in alittle
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Post by rupprat on Mar 1, 2014 13:43:55 GMT -6
The clutching setup you have looks more like the setup for a 440. Try this as a starting point. Primary weights should have no holes or rivets in them (Rupp pt. # 14918). Secondary spring should be in 2nd hole. Hope that helps.
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lobo
Senior Member
Posts: 58
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Post by lobo on Mar 1, 2014 16:32:39 GMT -6
Sprintmania
Thanks, that helps and makes a lot of sense. I'm used to Skiroules which use a very different chain tensioner.
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lobo
Senior Member
Posts: 58
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Post by lobo on Mar 2, 2014 13:37:20 GMT -6
But . . . What is the optimal amount of tension?
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