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RANDY J.V.
Senior Novice
Joined: 12 Dec 2006
Posts: 187
Location: SPRINGFIELD, OHIO
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 Posted: Tue Jun 26, 2007 7:19 am Post subject: NEW CASTLE |
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What gears do you guys usually run at New Castle in the yamaha sportsman class?  |
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Doug Stempfley II
Master
Joined: 27 Nov 2006
Posts: 817
Location: Trenton, Ohio
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| Posted: Tue Jun 26, 2007 7:28 am Post subject: |
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Aaaaah The Big question.......
I have ran a 12t driver and found good fortune with it, but recently I have been using an 11t and have gotten better results. I think as the weather gets hotter the 12t works better. Just my observation from racing JSY the past 2.5 years there. 11t-71 (+/- 1t) will get you in the hunt, depending on the config that Mike decides to run.
If I remember, OVKA runs the short track there at NCMP (no horseshoe or maza turn). Basically a wide-open course and fairly simple.
KRA races the next day (Sunday after the OVKA Saturday race) and has 2 classes for the JSY driver (double the track time and fun). They also have a large field of 20+ on average each race day. But keep in mind that they run 2 prac sessions, and then qualify then a final. See the KRA race day schedule http://www.newcastleraceway.com/racedayschedule.pdf
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Doug Stempfley II
O.V.KA Board Member
2008 Stempfley Race Season
OVKA Double Champion, Jr Yamaha 1 & 2
Sponsored By Upbeats DJ's, APPCO, L&T Clutches, Storage Plus, Slattery Chassis & State Farm. Arrow Karts Powered By APPCO Racing Engines |
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RANDY J.V.
Senior Novice
Joined: 12 Dec 2006
Posts: 187
Location: SPRINGFIELD, OHIO
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| Posted: Tue Jun 26, 2007 7:56 am Post subject: |
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| Thanks for the info we are thinking about going over this sunday. |
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Mike31
Master
Joined: 26 Nov 2006
Posts: 410
Location: KY
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| Posted: Tue Jun 26, 2007 9:08 am Post subject: Cadet gearing |
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Steve,
What is a good range for the Cadet gearing?
Also, What is the difference between a 12t and 11t if you run the same ratio gearing?
Ex. 11 X 77 vs. 12 X 84 both are 7.00 ratio
I know there has to be a reason but I don't know it.
Thanks,
Mike |
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Toshiya
Master
Joined: 04 Dec 2006
Posts: 1009
Location: Downtown Tokyo, Japan
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| Posted: Tue Jun 26, 2007 10:32 am Post subject: |
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Mike,
I think you can't change Comer engine's driver but I am not sure.
I thought it was WKA's rule. (Please check)
We ran with between 72 to 75 but you might want to ask Rob or Drew about this. They both have Novoso chassis.
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Doug Stempfley II
Master
Joined: 27 Nov 2006
Posts: 817
Location: Trenton, Ohio
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| Posted: Tue Jun 26, 2007 12:46 pm Post subject: |
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Mike
Diff between 11t & 12t and staying with the same ratio is basically from what I found is it's a power issue. You need to test it with your engine & kart.
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Doug Stempfley II
O.V.KA Board Member
2008 Stempfley Race Season
OVKA Double Champion, Jr Yamaha 1 & 2
Sponsored By Upbeats DJ's, APPCO, L&T Clutches, Storage Plus, Slattery Chassis & State Farm. Arrow Karts Powered By APPCO Racing Engines |
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Kathy20
Just Another Club Racer
Joined: 25 Nov 2006
Posts: 1328
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| Posted: Tue Jun 26, 2007 1:07 pm Post subject: |
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| So what's the recommendation for SuperCan gearing? |
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Toshiya
Master
Joined: 04 Dec 2006
Posts: 1009
Location: Downtown Tokyo, Japan
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| Posted: Tue Jun 26, 2007 1:23 pm Post subject: |
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Kathy,
The gear you can go fast. LoL
I have no idea!
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Mike31
Master
Joined: 26 Nov 2006
Posts: 410
Location: KY
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| Posted: Tue Jun 26, 2007 2:05 pm Post subject: 2 questions in 1 |
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Toshiya,
You are correct about the Comer K80.
I should be more specific.
What I meant to ask was:
What gearing range for Newcastle for the Comer K80?
My 2nd question is for the Yamaha SC where you are allowed to change drivers.
My specific question is this:
I am running a 10tooth engine driver with a range of rear axle sprockets of 80 to 87.
If I change to a 11tooth driver for Newcastle and need to run a 7.10 ratio then I would need to run a 78 sprocket which I don't have.
If I change to a 12 tooth driver and need to run a 7.10 ration then I could run a 85 sprocket which I do have.
Which is the better set up and why?
From what I have read most folks run the 11 tooth driver setup.
Why not a 12 tooth driver ? Is there a power disadvantage?
Thanks and sorry for the confusion.
Mike |
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John Horn
Master
Joined: 29 Nov 2006
Posts: 684
Location: Troy Ohio
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| Posted: Tue Jun 26, 2007 8:05 pm Post subject: |
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| 7.0 ratio is 7.0 ratio,,,no matter how you get there. It shouldn't matter what combination you use to get it, it is still the same final output. Last year we went up 1 tooth on the front driver, and we were fine on the rookie, and the super can...not sure about the comer though. |
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patrick slattery
Master
Joined: 01 Dec 2006
Posts: 701
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| Posted: Tue Jun 26, 2007 8:09 pm Post subject: |
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I will 2nd John on that one, a ratio is a ratio.
Pat |
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