anyone running the Dynamo Joe clutch kit in an 2009 Summit X Highmark 163". just wondering how they are working out. i was thinking of dropping to 19 top gear to gear it down for more staying power. correct me if i'm wrong, but the top stock gear is a 21. any feed back would be great!!!
Dynamo Joe clutch kit
- Thread starter bigrig73
- Start date
Do not go to a 19 top gear, you loose track speed.
As Teton said, do not gear down a 163....gearing is 21/49 already. The DJ kit is a solid addition.
what about dropping to a 20 top gear, or should i just leave the 21 in.
S
SilverGriz
Well-known member
I recently geared my 163" down to a 19 tooth and didn't notice any less track speed. It does feel a little more torquey now.
We have had the best luck gearing the 163's lower.....20, even 19. Our shop sled is now at 20/51, but also running a 174 2.5. IMo the lower the better within reason as long as you alter the clutching to take advantage of it.
did you have to change the chain size with the 19 top gear?
Principle - Lower gearing gives your track speed "staying power"
Example, you run across a meadow in 2~3 feet fresh wet/heavy getting 40 mph track speed.
You have the ability to turn the sled nearly 90 degrees under full throttle, this is a high load change/increase and the track speed diminish 10 mph with a 21 gear.
On the exact same run beside with a 20 gear, you may only lose 7mph under full throttle
On the exact same run beside with a 19 gear, you may only lose 6mph under full throttle.
With each lower gear and confirm calibration maintains "rated rpms" the diminishing mph will be less and the track speed recovery will be quicker. If the rpms drift low under the hard turn (high load change) the rpms will diminish less with the lower gear.
Guys always ask "should I gear lower?" I don't recommend anything, rather explain what the principle of lower ratios will provide or enhance a certain feature of calibration. Choose your own poison. In the end whatever gear you choose, always try to make sure your flyweight offer calibration that will allow engine to run at rated rpms and recover to rated rpms while under full throttle.
Example, you run across a meadow in 2~3 feet fresh wet/heavy getting 40 mph track speed.
You have the ability to turn the sled nearly 90 degrees under full throttle, this is a high load change/increase and the track speed diminish 10 mph with a 21 gear.
On the exact same run beside with a 20 gear, you may only lose 7mph under full throttle
On the exact same run beside with a 19 gear, you may only lose 6mph under full throttle.
With each lower gear and confirm calibration maintains "rated rpms" the diminishing mph will be less and the track speed recovery will be quicker. If the rpms drift low under the hard turn (high load change) the rpms will diminish less with the lower gear.
Guys always ask "should I gear lower?" I don't recommend anything, rather explain what the principle of lower ratios will provide or enhance a certain feature of calibration. Choose your own poison. In the end whatever gear you choose, always try to make sure your flyweight offer calibration that will allow engine to run at rated rpms and recover to rated rpms while under full throttle.
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