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Old 11-14-2005, 11:57 AM   #1
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Default Sedan Mod Motor and tire Question

Hi,
I am preparing to run modified oval sedan. Unfortunately no one knows what a good mod motor would be in terms of Turns and winds. I will be running on carpet at the Birds and could use some opinions on foam tires as well. I looked at Jaco's website and they seemed to be the tire to use in Vegas...can anyone please help recommend what turn and wind motor I should use for oval application? Thanks
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Old 11-14-2005, 01:21 PM   #2
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I know this is in the on road section, but no one in the oval section seems to know.............any help would be appreciated.
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Old 11-14-2005, 02:20 PM   #3
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Well, if the rules are anything like the regular oval classes you’ll be running 4 minutes…. SO, go with a 7x1 geared at a 20mm rollout, AND PUNCH IT….


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Old 11-14-2005, 08:12 PM   #4
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I have a question on rollout. The rollout I use comes out at .9845 or 1.0 How do you get 20mm?
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Old 11-14-2005, 08:19 PM   #5
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Well...

You need to figure out the circumference of your tires. 58mm tires come to about 182mm. (diameter x pi)

You then divide that dumber by the FDR of your car. On my Xray, using a 120t spur and 27t pinion, I get 120/27 x 1.7 (internal drive ratio, specific to car)
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Old 11-14-2005, 09:18 PM   #6
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Quote:
Originally Posted by rockdog200
I have a question on rollout. The rollout I use comes out at .9845 or 1.0 How do you get 20mm?
.9845" = 25.01mm


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Old 11-15-2005, 07:19 AM   #7
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Would the new two stage Jaco's be the tire of choice?
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Old 11-15-2005, 07:26 AM   #8
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Ginsu,

The sedan oval class at the birds runs a handout 19t( Ultrabird ).
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Old 11-15-2005, 07:34 AM   #9
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Quote:
Originally Posted by TimPotter
Ginsu,

The sedan oval class at the birds runs a handout 19t( Ultrabird ).

WEll, that just took al the fun out of it



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Old 11-16-2005, 06:22 PM   #10
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Thanks Tim,

Any suggestions you can offer for sedan oval?
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Old 11-16-2005, 07:25 PM   #11
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I suggest not using a regular set up. When you only have to turn left your setup can be "unusual" to be dialed. Like 3 degrees of camber on rf wheel and 0 degrees on the front left. Different foam tires on each corner. etc...

Or get a pan car and use a car made to go in circles
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