NightRogue
Pinnacle OPE Member
It was supposed to be a surprise for everyone......
Guess not so much right now lol
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Another chainsaw dyno...
- Thread starter Red97
- Start date
Guess not so much right now lol
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NightRogue
Pinnacle OPE Member
Ooppss
That makes us both party pooper now [emoji1787]
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Little Friday fun.
Got the dyno all setup to run these 2t bike engines.
Something else to port between saws.
They have a 4:1 reduction built in, I need to adjust the brake to slow the high tq, low rpm.
Got the dyno all setup to run these 2t bike engines.
Something else to port between saws.
They have a 4:1 reduction built in, I need to adjust the brake to slow the high tq, low rpm.
SpaceBus
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Looks like fun side work.
Egg Shooter
New OPE Member
I was kicking around buying one to oil test on and later practice port hackery on but fellers, because of my known medical problems, suggested the vibs most likely would be bothersome. I guess they will vibrate like crazy at certain RPM. It may have been you in the oil PM that mentioned that. I gotta come up with a rubber mounted option......
They can get pretty wild too.
Billet case, liquid cooled, stroker crank, case reed....
88ish cc
In a bicycle....
RI Chevy
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Does the 4:1 reduction mean that you multiply the result times 4 to get the 1:1 result?
Just trying to figure out how to compare this to a comparable chain saw result.
These little motors look expensive.
Just have to set the program accordingly.
With the chain ratio these saws run 2:1 Just to help load sensitivity. No way the little guys could spin 1:1 with 24" of chain and dyno inertia.
The graphs that are printed are all "corrected" as if these were all direct drive.
Just the dyno is spinning less rpm with the bike engine at 10k than it would with a saw at 10k.
2500 vs 5000rpm because of the ratios
The program asks for the ratio to calculate engine power. That is why I share the corrected engine power, as it is as close to crank power as I can get.
The observed tq from the "gearing" would be 2, and 4x what crank tq would be.
The engine kits like on The dyno can be had for less than 200$. As the entire kit to make a full motorized bike.
The fancy one is about 2k$ by the time you get it All set up. Just for the engine and cooling system
SpaceBus
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NightRogue
Pinnacle OPE Member
SpaceBus
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Didn't see this reply earlier, that does sound like a fun time, didn't realize it was part of a kit for a bicycle.
SpaceBus
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That is a stout saw! Wish I knew about it when I bought the 395xp. Really, I should have just joined this forum before pulling the trigger on any mill saw. It looks like it would fit the Logosol saw carriage as well...
