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#Post#: 84520--------------------------------------------------
Full circle
By: Cut4fun Date: February 22, 2019, 6:45 am
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Cant find the dang thread.
Saving pics
Jerry Gingras pic of MVP 272 cranks
Pic of my MVP 5000 partner crank
#Post#: 87956--------------------------------------------------
Re: Full circle
By: SquareFile Date: May 5, 2021, 2:09 pm
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HTML https://youtu.be/GWngpdMzDJY
#Post#: 88120--------------------------------------------------
Re: Full circle
By: Al Smith Date: June 22, 2021, 7:26 am
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It's an interesting theory with f/c crank throws .Very popular
during the glory days of 2 cycle go karts .I think the idea was
to reduce the crankcase volume therefore increasing the transfer
pressure .
The full circle cranks on Harley v twins was just to have the
crank throws act as an internal flywheel plus it was much more
simple to make .The actual design of that engine is a direct
take off of a radial aircraft engine except it only has two
cylinders .
I have a theory the increased weight of the rotating mass with a
full circle crank would some what increase the inertia mass
regarding changing potential energy into kinetic energy under
load .--goes back to Newtons laws of physics .
#Post#: 90308--------------------------------------------------
Re: Full circle
By: Chainsawrepair Date: November 20, 2023, 3:54 pm
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One of the mods in my FB CR group does full circle cranks. Here
is 372 and 4910 501 ones
#Post#: 90311--------------------------------------------------
Re: Full circle
By: 3000 FPS Date: November 22, 2023, 11:56 am
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[quote author=Cut4fun . link=topic=7196.msg90308#msg90308
date=1700517299]
One of the mods in my FB CR group does full circle cranks. Here
is 372 and 4910 501 ones
[/quote]
That is some nice looking cranks. Some nice looking work.
#Post#: 90474--------------------------------------------------
Re: Full circle
By: SquareFile Date: February 4, 2024, 2:17 pm
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[quote author=Cut4fun . link=topic=7196.msg90308#msg90308
date=1700517299]
One of the mods in my FB CR group does full circle cranks. Here
is 372 and 4910 501 ones
[/quote]
One on right appears to be separating. The one on the left is
scalloped "turbocrank" 70s bike tech that, well.... I've seen
both. JMO, searching for big gains that aren't there. Carbs and
porting is where it is at. Both are a 2fold.
#Post#: 90951--------------------------------------------------
Re: Full circle
By: EHP Date: October 29, 2024, 6:05 pm
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I have owned and worked on other full circle cranks out of
Quebec , they work fine but the problem is the crank fills the
crankcase up so much you cannot move alot of air so yes they
work and run good but if someone shows up that has his crap
together with a normal stroked crank your not going to like it .
On a full circle 272 crank setup you donot have to do much carb
work to run on 12026 fuel so that along tells you your not
moving much air
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