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Old 02-06-2005, 11:24 PM   #16
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Originally posted by Mal
I don't get it ... why ask a bunch of people who have never driven or seen your track advice about how to gear?

The best way to find out, is ask the fast guys at your track and then adjust the gearing 3-4 teeth up and down. Gear based on laptime ....
True, but a lot of times they will tell you their rollout.
This thread is just showing people how to convert that to get the pinion you need.
It's also showing them how to deal with different tire size since with foam, it changes throughout the race day.
More informative than actually trying to find out how to gear for your track.
I think guys just want to know how to tackle the problem from different angles when they do ask.
After a while you won't need to ask, you'll just know and grow in the hobby.
I think that is what we are trying to accomplish with this thread.
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Old 02-08-2005, 08:08 AM   #17
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Thumbs up rollout

Very well put scoobydo.
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Old 02-08-2005, 10:28 AM   #18
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Well ... doesn't sound like your local fast guys are very helpfull then. Most tracks I go to, guys go out of their way to help and tell you how to calculate rollout. They will tell you how to gear based on track and tire size, they will even suggest a gearing based on what they see when you drive. I've been racing for a number of years and I've always found the tips from guys at my local track were always better then tips I got from the forums.

Also if you look hard enough ... there's an excell file floating around that will calculate rollout for you. I'm sure some of the hardcore 1/12 scale guys have the program.
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Old 02-08-2005, 01:06 PM   #19
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Quote:
Originally posted by Mal
Well ... doesn't sound like your local fast guys are very helpfull then. Most tracks I go to, guys go out of their way to help and tell you how to calculate rollout. They will tell you how to gear based on track and tire size, they will even suggest a gearing based on what they see when you drive. I've been racing for a number of years and I've always found the tips from guys at my local track were always better then tips I got from the forums.

Also if you look hard enough ... there's an excell file floating around that will calculate rollout for you. I'm sure some of the hardcore 1/12 scale guys have the program.
The only problem with that is that the Pro4 has an internal drive ratio. 1/12th is direct drive so it wouldn't work for us.
I also have an excel spreadsheet I made for the pro4, It works great.
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Old 02-09-2005, 12:23 AM   #20
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Here is a link to download my Excel Sheet which automatically calculates rollout for the Pro4.
Just type in Tire Size, Spur & Pinion size. The file does the rest.
Hope it helps.

http://www.atalantadesign.com/pro4rollout.xls
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Old 02-12-2005, 07:56 PM   #21
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Anyone got a good starting rollout for 19 turn on a very tight twisty track?
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Old 02-12-2005, 08:09 PM   #22
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Thumbs up Excel sheet

Hey Scoobydo thnx for the excel rollout worksheet works great.
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Old 02-12-2005, 08:15 PM   #23
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Quote:
Originally posted by fire929
Hey Scoobydo thnx for the excel rollout worksheet works great.
No problem!
Hope it helps.
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Old 02-13-2005, 03:05 AM   #24
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Quote:
Originally posted by scoobydo
Anyone got a good starting rollout for 19 turn on a very tight twisty track?
Depending on your motor. I run an epic 19t and I use 24-26mm depending on the layout. (My local track is tight and twisty)
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Old 02-13-2005, 03:52 AM   #25
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hey guys that rollout chart by scoobydo is good. but i have found and been using thes site for a while now to find out my rollouts and gear ratios.

here it is: www.GearCharts.com

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Old 02-13-2005, 03:24 PM   #26
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Quote:
Originally posted by Pro4
Depending on your motor. I run an epic 19t and I use 24-26mm depending on the layout. (My local track is tight and twisty)
I'm running a 19T Element.
Does anybody know the RPM for that motor?
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Old 02-13-2005, 03:46 PM   #27
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Default 19 turn element

28, 510 last dyno test from orion peak rpm for the element 19 turn.
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Old 02-13-2005, 07:44 PM   #28
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Default Re: 19 turn element

Quote:
Originally posted by fire929
28, 510 last dyno test from orion peak rpm for the element 19 turn.
Thanks!
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