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Cox Engine of The Month
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My entry in this years Tach Race
Page 1 of 1
cryo-one- Moderate Poster
- Posts : 27
Join date : 2013-01-13
Age : 81
Location : New Westminster, B. C. CANADA
Re: My entry in this years Tach Race
pkrankow Sun Jan 27, 2013 8:47 am
Do you know the providence of that motor?
Phil
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: My entry in this years Tach Race
cryo-one Sun Jan 27, 2013 2:15 pm
I know everything about it as I built it.
Please list your questions and I will answer them.
Wayne
Please list your questions and I will answer them.
Wayne
cryo-one- Moderate Poster
- Posts : 27
Join date : 2013-01-13
Age : 81
Location : New Westminster, B. C. CANADA
Re: My entry in this years Tach Race
pkrankow Sun Jan 27, 2013 2:54 pm
Well then!
What did you do to build it?
How did you form the intake assembly?
How did you seal the back plate from the reed?
How did you decide on the hole location and size for the intake timing? Or did you just make a hole in a location you thought suitable?
Can you post photos of it disassembled?
Does it run better than as a reedy?
Phil
What did you do to build it?
How did you form the intake assembly?
How did you seal the back plate from the reed?
How did you decide on the hole location and size for the intake timing? Or did you just make a hole in a location you thought suitable?
Can you post photos of it disassembled?
Does it run better than as a reedy?
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: My entry in this years Tach Race
cryo-one Sun Jan 27, 2013 3:30 pm
How did you form the intake assembly?
- Chose a cylinder that was good but not valuable.
- Milled a 1/4 " dia. flat on the side below the ex. port.
- Machined a steel tube 1/4" dia. X 5/16" long with 1/8" dia hole through center & threaded OD 1/4 - 32.
- Silver Soldered tube to flat on the cylinder and then drilled 1/8 hole through cylinder wall.
- Cleaned all burrs and lapped cylinder bore.
How did you seal the back plate from the reed?
- The reed is still there but passage behind it is plugged.
- The reed assembly just 'stuffs' the crankcase.
The location of the intake port is determined by available physical space on the side of the cylinder.
The diameter of the port was chosen to match the ID of a Tee Dee crankshaft.
Intake timing appears to be about 95 deg BTDC to 95 deg ABDC.
Pictures will have to wait until it returns from the TACH RACE.
Tach Race will provide performance numbers.
Regards, Wayne
- Chose a cylinder that was good but not valuable.
- Milled a 1/4 " dia. flat on the side below the ex. port.
- Machined a steel tube 1/4" dia. X 5/16" long with 1/8" dia hole through center & threaded OD 1/4 - 32.
- Silver Soldered tube to flat on the cylinder and then drilled 1/8 hole through cylinder wall.
- Cleaned all burrs and lapped cylinder bore.
How did you seal the back plate from the reed?
- The reed is still there but passage behind it is plugged.
- The reed assembly just 'stuffs' the crankcase.
The location of the intake port is determined by available physical space on the side of the cylinder.
The diameter of the port was chosen to match the ID of a Tee Dee crankshaft.
Intake timing appears to be about 95 deg BTDC to 95 deg ABDC.
Pictures will have to wait until it returns from the TACH RACE.
Tach Race will provide performance numbers.
Regards, Wayne
cryo-one- Moderate Poster
- Posts : 27
Join date : 2013-01-13
Age : 81
Location : New Westminster, B. C. CANADA
My entry in this years Tach Race
pkrankow Sun Jan 27, 2013 6:05 pm
I look forward to performance numbers!
Phil
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: My entry in this years Tach Race
Motra Sun Jan 27, 2013 10:13 pm
Do you feel that the piston port design offers some advantages or is this more experimental?
Motra- Gold Member
- Posts : 110
Join date : 2010-08-20
Location : SLC, UT
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