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Stock vs Mod

Old 07-10-2018, 07:33 PM
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Questions?? Stock vs Mod

Hello,

My understanding is that 10 Scale racing has two major categories: Stock and Mod.
- What are their main differences?
- Is stock one category, or are there sub-sets for each motor rating (ie, 21.5T 17.5T, 13.5T, etc)?
- If a motor has a Kv rating as opposed to Turns, in which category does it race?
- Which category do you prefer and why?

Many thx
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Old 07-10-2018, 08:14 PM
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Stock 2wd buggy is 17.5
Stock 4wd buggy and 2wd stadium have been 13.5 lately
Stock 2wd short course is 17.5 but many tracks are going 13.5
4wd short course uses 1/8 scale motors, Kv rated. I believe it's generally an open class

all stock classes are blinky. Stock racers tend to go for light weight and low rolling resistance, as well as getting battery internal resistance as low as possible.

Mod is any turn motor, and ESC timing is allowed. Weight, rolling resistance and batteries tend to matter less than in stock, but accelerated wear on everything is a draw back.

I race stock because I can't drive well enough to handle mod, and stock tends to be more popular.
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Old 07-11-2018, 06:52 AM
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Stock is using a motor and ESC by the rules. That can be a one model motor or one from a list. Most of the time a blinky ESC is needed or just one model ESC (like ETS rules). With new devellopments it could be that an ESC with a RPM limiter is needed.

Mod is simply everything is alowed as long the dimensions are within the rules.

Regarding Kv, if you are talking about 1/10 motors then there is a high chance that those motors are not alowed. Kv ratings are most of the time specified on sensorless motors which are not listed in any stoc/spec class.

With 1/8 electric then yes, there are rules about a max Kv rating because all those motors are specified in Kv.
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Old 07-14-2018, 11:31 AM
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If the only motor you have is kv rated, then you can run novice or mod. Start with novice, then try to pick up a cheap used 17.5 from someone at your track when you start thinking about stock.
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Old 07-19-2018, 01:42 AM
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stock is slower class because you must not run any timing advance in the esc and you must run a slower motor. Most stock 2wd buggy must run a 17.5 turn motor and 4wd buggy run a 13.5 motor and on road touring cars run 21.5 motors. mod is a much much faster because you can run any motor and any amount of timing in the esc. Stock generally is more competitive and usually much more popular generally because mod is very hard to drive.
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Old 07-19-2018, 12:44 PM
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Mod usually means more money and more mechanic time.
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Old 07-19-2018, 11:21 PM
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Originally Posted by riceball777
stock is slower class because you must not run any timing advance in the esc and you must run a slower motor. Most stock 2wd buggy must run a 17.5 turn motor and 4wd buggy run a 13.5 motor and on road touring cars run 21.5 motors. mod is a much much faster because you can run any motor and any amount of timing in the esc. Stock generally is more competitive and usually much more popular generally because mod is very hard to drive.
It is just what the club or competition has stated, in Europe a 10.5 or a 13.5 turn motor with a blinky ESC is much used for onroad touring.

Originally Posted by southerntraders
Mod usually means more money and more mechanic time.
Most drivers disagree with you. With stock to get an advance you need to have the best. People do buy 10 motor/esc combo's and test all possibillities to pick out the fastest combination. Also they have the need to replace all bearings by ceramics, buy low friction pulleys, the best batteries etc.

While with mod all those things have a less influence on the total performance.
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Old 07-30-2018, 12:32 PM
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Originally Posted by JCG1
Hello,

My understanding is that 10 Scale racing has two major categories: Stock and Mod.
- What are their main differences?
- Is stock one category, or are there sub-sets for each motor rating (ie, 21.5T 17.5T, 13.5T, etc)?
- If a motor has a Kv rating as opposed to Turns, in which category does it race?
- Which category do you prefer and why?

Many thx
Nice additional context to this discussion
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Old 09-04-2018, 03:23 AM
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For fair racing I prefer mod, driving skill decides the winner. Stock is good for scale speed and realistic racing, but mostly creative engineering skill decides the winner if tech is not strict
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Old 03-19-2020, 12:49 PM
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I think Jason articulated a good idea. Institute a rating system. Rating not Ranking - sorta like the Chess Rating System. So, drivers can be classed by rating scores not their pocket books.

For example, if you have a RC rating score of 1200 or higher you would be in once class called "Expert". If you had a score of 900 to 1200, your class would be "Intermediate". And lower than 900, you would be "Beginner". So, the cost would not be the central factor in grouping drivers, but skill level.

An off shoot of this concept would be driver innovation. For example, two drivers with a score of 1000. One driving a 17.5 and the other driving a 5.5. Their cars would be setup very differently. Ideally, they could swap ideas more freely than if they both had the same mechanics. Tuning and testing would become more prevalent, rather than buying the best motor for the class.

The real question is "How you would sanction this?". That would be a big hurdle. You need a centralized system for the whole country. You would need various metrics and a centralized data base. That would take a lot of money. I do not know if ROAR or IFMAR has enough money to make it possible.

But if you could pull this off, RC racing would have a more level playing field.

Just thinking,
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Old 03-19-2020, 12:49 PM
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Another idea,

Another way to go is to rate drivers by their top 10 times. That way you would not need a centralized database. Just a track timing system.

For example, the "Advanced Drivers" have 12 sec or less times. "Intermediate Drivers' have 12 to 14 second times. "Beginner Drivers" have above 14 seconds. So, you can group them according to time and not materials (engine, batteries, and/or upgrades).

The only problem I see is the following: Faster drivers will sand bag to get in to a class they think they can win.
So, a solution could be as follows: Races has bump ups. The top 2 winners of each class gets bumped up to the next class, but drivers can only be bumped up one time.

For example, an "Intermediate" driver (who is sandbagging) wins their B main race. They get bumped up to the A main intermediate. They win that race. They are done racing of the night. The 2nd and 3rd finishers of the A main (that were not sandbagging) get bumped up to the "Advanced" B main. They place 7th and 8th in that race. Their top 10 times go down by 1 sec. Next race day, they are in the "Advanced" class.

It is not a perfect system, but this is how decentralized racing could work by ratings and not by class.

Glenn
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