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Re: Piston travel for 15 crank rotation [Re: Tom D. 67 Bonny] #641567 02/24/16 5:57 pm
Joined: Apr 2006
Posts: 850
Tom D. 67 Bonny Offline OP
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The Pazon is here!
[URL=http://s59.photobucket.com/user/tomd7735/media/IMG_0009_zpsvwhrjcqu.jpg.html][Linked Image][/URL
The folks from New Zealand want it set up at full advance, 38 BTDC.
Using the convertor at dansmc.com, that's at 0.42" BTDC. Since it is a 'wasted spark' system, it doesn't matter whether I'm on the power or exhaust stroke.
Then it's just a matter of lining up a red dot on the rotor to a hole in the trigger plate, then set the rotor with a firm tap into the taper of the exh. cam.
After started, then I can check timing with a strobe, using my newly scribed marks.

A lot easier than fiddling with the AAU and points gap, etc. 7+1/2 yr warantee too. That's odd.

Last edited by Tom D. 67 Bonny; 02/24/16 6:11 pm.

Tom D. 1967 T120R Bonneville
Anyone know of a place that sells Loctite
by the quart?
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Re: Piston travel for 15 crank rotation [Re: Tom D. 67 Bonny] #641775 02/25/16 10:28 pm
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Tom D. 67 Bonny Offline OP
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I got the Pazon yesterday. All pieces present and accounted for, and a few extras.


[Linked Image]


The instructions included say to start out at 39 BTDC or full advance. So I backed off from TDC by 0.42" and called it good. They give you plenty of wire; you could mount the little black box on the rear fender if you wish. But I found a nice spot under the tank just in front of the coils. I made a plate that would mount to where the old secondary dual condensor was. Plenty of hollow plastic tubing so I could neaten up the wiring. If anyone wants, I have pics of the wiring diagram...

[Linked Image]

Now to finish with the rewiring job, put in some new oil, start and strobe her...


Tom D. 1967 T120R Bonneville
Anyone know of a place that sells Loctite
by the quart?
Re: Piston travel for 15 crank rotation [Re: Tom D. 67 Bonny] #641777 02/25/16 10:52 pm
Joined: Apr 2006
Posts: 850
Tom D. 67 Bonny Offline OP
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Posts: 850
The wiring in was easy, except for those small wires that attach to the trigger plate connector.
Maybe I need new glasses...
[Linked Image]


Tom D. 1967 T120R Bonneville
Anyone know of a place that sells Loctite
by the quart?
Re: Piston travel for 15 crank rotation [Re: Tom D. 67 Bonny] #664863 08/22/16 2:00 pm
Joined: Apr 2015
Posts: 179
K
ken sak Offline
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K
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I've talked about crank offset being relative to max acceleration of piston to stroke/rod length
why? well why did the Vincent engine be so successful
the Honda 4 with offset crank similar be so successful
the maximum acceleration of the piston causes maximum
vacuume on the intake to draw air fuel in. also cancelling
balance vibrations which drain hp
I built a v8 that produced 1.6 hp/ci on cam set to have maximum lift at maximum acceleration of the piston causing maximum vacuume on the intake to draw air fuel in. .

well I found this

http://www.dansmc.com/mc_software2.h

the 650 with 6.5 rod has max acceleration down the bore
of 8-9 thou increase in lift of piston per degree of rotation from 57-61 atdc

a article I have a racer said with a 76 degree crank pulled harder out of corners than a 90 degree crank ,
750 with 6" rod 50-56 degree from tdc max acceration
so it looks like another offset from MAP could be more
hp

Last edited by ken sak; 08/22/16 2:01 pm.
Re: Piston travel for 15 crank rotation [Re: Tom D. 67 Bonny] #665045 08/24/16 8:18 am
Joined: Apr 2015
Posts: 179
K
ken sak Offline
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K
Joined: Apr 2015
Posts: 179
3 piece 650 crank 6 bolts 6.5 rod -ie rotate 1 bolt hole ,optimum offset- free hp
get intake centerline at 60 atdc david visard performance and economy ,I had intake timing figures 40/50 on a v8 who'd think
it would pull hard past 7,000rpm and produce 1.6 hp/ci

Last edited by ken sak; 08/24/16 8:23 am.
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