U
uncle_punk13
Guest
Hey all,
I've started going back through the Whizzer. I re-set everything on the carb back to 'zero' and went from there. I was cruisin around the neighborhood on it for a few hours, and had it topped out at 45 M.P.H. There is a lack of power that feels like the head is not seating properly for sealing...This coupled with the fact that there is a bit of seepage from the head makes me think it's perhaps warped. I'll take it into work in a couple of weeks and touch it on the lapping plate to see if there are any high/low spots indicating warpage.
The heads on these are still a little on the small side, with very small/short cooling fins. There's also a very odd wahser arrangement set up on the head and we believe these to be not locking down properly, allowing the head to move.
I believe I would like to attempt to design and machine a new head from solid stock. I'm thinking a radial fin design, with thicker/taller/more fins for better surface/cooling area... Mostly for fun, but also to see if this helps any with the head and heat issues.
I'll be working at my old job in the aerospace machining industry starting next week, so I'll have access to all the C.N.C. mills (4th axis, rotary tables, etc.), and the people who are better programmers than I.
It won't be done this month or anything, but I'm thinking throughout the winter...
I'm also thinking, that I'll machine a few other parts, such as the deflector piece that goes between the carb and intake port machined from aluminum, and port matched for better flow.
I'm also considering getting a stock engine kit (whizzer), to put on the '50 dx, and using this other engine on my other project, which would not be eligible for MB.c as it is a 1948 CZ 125 b frame, albion 3-speed transmission, late 50's Daimler moped front wheelset, Whizzer hydraulic forks, Honda 90 swing arm suspended with a Cushman truckster half leaf spring, honda 90 rear wheelset, andno pedals.
Well we'll see where it goes and what happens.
Golly; why, oh why, do I like whizzers so much? Is it the challenge of doing all this oddball stuff with them, and attempting to make long journey's with them? Is it just that they look neat and are very closely related to the earliest of motorized two wheeled devices? I don't know...
I've started going back through the Whizzer. I re-set everything on the carb back to 'zero' and went from there. I was cruisin around the neighborhood on it for a few hours, and had it topped out at 45 M.P.H. There is a lack of power that feels like the head is not seating properly for sealing...This coupled with the fact that there is a bit of seepage from the head makes me think it's perhaps warped. I'll take it into work in a couple of weeks and touch it on the lapping plate to see if there are any high/low spots indicating warpage.
The heads on these are still a little on the small side, with very small/short cooling fins. There's also a very odd wahser arrangement set up on the head and we believe these to be not locking down properly, allowing the head to move.
I believe I would like to attempt to design and machine a new head from solid stock. I'm thinking a radial fin design, with thicker/taller/more fins for better surface/cooling area... Mostly for fun, but also to see if this helps any with the head and heat issues.
I'll be working at my old job in the aerospace machining industry starting next week, so I'll have access to all the C.N.C. mills (4th axis, rotary tables, etc.), and the people who are better programmers than I.
It won't be done this month or anything, but I'm thinking throughout the winter...
I'm also thinking, that I'll machine a few other parts, such as the deflector piece that goes between the carb and intake port machined from aluminum, and port matched for better flow.
I'm also considering getting a stock engine kit (whizzer), to put on the '50 dx, and using this other engine on my other project, which would not be eligible for MB.c as it is a 1948 CZ 125 b frame, albion 3-speed transmission, late 50's Daimler moped front wheelset, Whizzer hydraulic forks, Honda 90 swing arm suspended with a Cushman truckster half leaf spring, honda 90 rear wheelset, andno pedals.
Well we'll see where it goes and what happens.
Golly; why, oh why, do I like whizzers so much? Is it the challenge of doing all this oddball stuff with them, and attempting to make long journey's with them? Is it just that they look neat and are very closely related to the earliest of motorized two wheeled devices? I don't know...
