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glassdoctor · 11:54 AM

Here's what I'm thinking...

Example: My buggy is geared 18/46 (8.4:1 final drive ratio) which is pretty tall.. larger pinions would probably need to be custom made, and 44T is the smallest spur I know of that will work easy. I could gear it higher but not with commonly used parts.

With this 8.4:1 ratio as an example... 70mph = 42K rpm... 80mph = 48K rpm

That's an estimate based on the 43mph I got yesterday on my "26K rpm" setup.

The same #'s say a 35K setup would run 58mph with the 8.4:1 gearing. And to go faster:

80mph = 6:1 ratio (25/46 pinion/spur)

That may actually be a good setup if you can get some big pinions. Anyone know where to get some like that?.... 20-25T range?

Just a rough estimate... I havent' even checked it against my old numbers I have recorded etc or BrianG's calc...

	(#19)
glassdoctor TEAM FUSION Offline Posts: 2,041 Join Date: Jul 2006 Location: Iowa... Hawkeye country	09.18.2006, 11:52 AM Here's what I'm thinking... Example: My buggy is geared 18/46 (8.4:1 final drive ratio) which is pretty tall.. larger pinions would probably need to be custom made, and 44T is the smallest spur I know of that will work easy. I could gear it higher but not with commonly used parts. With this 8.4:1 ratio as an example... 70mph = 42K rpm... 80mph = 48K rpm That's an estimate based on the 43mph I got yesterday on my "26K rpm" setup. The same #'s say a 35K setup would run 58mph with the 8.4:1 gearing. And to go faster: 80mph = 6:1 ratio (25/46 pinion/spur) That may actually be a good setup if you can get some big pinions. Anyone know where to get some like that?.... 20-25T range? Just a rough estimate... I havent' even checked it against my old numbers I have recorded etc or BrianG's calc... Last edited by glassdoctor; 09.18.2006 at 11:54 AM.