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Old 08-19-2010, 01:16 AM   #1
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Questions?? What is a reliable .21 for club racing?

I have a kyosho evolva and I just want to have something to run around the track so my 9 year old son can get some practice, We will not be racing for a few years until my son has had some good practice. Does anyone know where I can find a reliable good motor?

On a side note, What is the difference between a on-road motor and a off-road motor?

Thanks, Matt
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Old 08-19-2010, 05:19 AM   #2
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Default hopefully i can help

new to this and have posted some info to you in your private messages..regards stuart
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Old 08-19-2010, 07:50 AM   #3
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On road motors have more ports for higher RPM, off road motors have less ports and are designed for torque.

There are a few "economy" on-road 21's out there that wont break the bank, and would be good for learning, but the performance will lack in comparrison to the top motors (obviously)

Here are a few:

http://www3.towerhobbies.com/cgi-bin...&I=LXRYV2&P=SM

http://www3.towerhobbies.com/cgi-bin...&I=LXXKX8&P=SM
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Old 08-19-2010, 07:59 AM   #4
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Thanks for the info guys, I was wondering if a buggy motor would work in a on road car. I'm not looking for super fast speed yet, My son had been racing off road for a year now and he can get around the track pretty good I just want to introduce him to on-road .

Any more info is greatly appreciated.

Thanks, Matt
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Old 08-19-2010, 08:10 AM   #5
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Originally Posted by jakerz View Post
On road motors have more ports for higher RPM, off road motors have less ports and are designed for torque.
Explain the very fast 3 port .12 engines.... The number of ports is more a commercial statement to make the faster motors more different than the slower and so more expensive, a 3 port can run as fast as a 9 port.

An offroad will work but I will try to find an onroad head for it. For sure on small tracks it is fast enough. If you want a cheap engine you can take a look to the Picco Basic or the Novarossi Basic N21-3T or the 5T
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Old 08-19-2010, 08:24 AM   #6
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In Argentina (southamerica) there is a big grow in 1/8 Onroad, as they initiated a "economy class", they use :

- Wich ever 1/8 Chassis you want.
- 3 port .21 engines only (most used, Picco 3 port offroad, OS VG 3 port, Novarossi 3 port and GO Engines 3 port)
- 16% nitro
- 40 Shore tires (any brand) for everyone.

Im from Chile and we are starting a 1/8th Onroad class and will homologate to Argentinian initiative as we found it very nice, low budget and fun to race. Argentinian drivers says that between the 3 port economy class and the pro open class on same track, lap time differences are on average of 0.5 to 0.7 of a second per lap so ... i dont think its a HUGE difference that worth the extra $$$ if all people is racing at same technical basde as you

just $ .000001


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Old 08-19-2010, 09:22 AM   #7
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Is this a motor to start with? Do I need to find a on-road cooling head for this motor or will the stock one be fine?

http://www.amainhobbies.com/product_...-Standard-Plug
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Old 08-19-2010, 09:28 AM   #8
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Have the same car and i new to this hobby too. Using a IDM .21 evo4 engine on the evo m3 idm 35 shore tire and P909 shell the engine has lasted 3 month of daily abuse of 3 fuel bottle a day

Have fun
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Old 08-19-2010, 09:36 AM   #9
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We have economy Novarossi .21 engines.

http://www.serpentamerica.com/shop/home.php?cat=87

They are high quality engines at very good prices. They start at less than $200.
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Old 08-19-2010, 09:47 AM   #10
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We have economy Novarossi .21 engines.

http://www.serpentamerica.com/shop/home.php?cat=87

They are high quality engines at very good prices. They start at less than $200.
+1. Those motors are PERFECT for what you are doing.
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Old 08-19-2010, 10:14 AM   #11
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We have economy Novarossi .21 engines.

http://www.serpentamerica.com/shop/home.php?cat=87

They are high quality engines at very good prices. They start at less than $200.


Those motors look great, But what is the difference between yours

http://www.serpentamerica.com/shop/p...&cat=87&page=1

and this one?

http://www.amainhobbies.com/product_...-Standard-Plug


Thanks, Matt
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Old 08-19-2010, 11:47 AM   #12
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Those motors look great, But what is the difference between yours

http://www.serpentamerica.com/shop/p...&cat=87&page=1

and this one?

http://www.amainhobbies.com/product_...-Standard-Plug


Thanks, Matt
That's an offroad motor. It will have much less timing in it. It will still work but the onroad motors will give you much more power, though still a bit less than the top, high dollar onroad motors.
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Old 08-19-2010, 04:19 PM   #13
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Quote:
Originally Posted by nelson6500 View Post
Those motors look great, But what is the difference between yours

http://www.serpentamerica.com/shop/p...&cat=87&page=1

and this one?

http://www.amainhobbies.com/product_...-Standard-Plug


Thanks, Matt
Hi Matt,

I don't know that motor. It's not a current motor ie it's not on Nova's list of 2010 motors. However, it's an off-road motor so like others have said, less HP, more torque at lower RPMs... also it uses a standard plug. I would recommend using a TURBO plug for GT.
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Old 08-19-2010, 06:09 PM   #14
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Explain the very fast 3 port .12 engines.... The number of ports is more a commercial statement to make the faster motors more different than the slower and so more expensive, a 3 port can run as fast as a 9 port.

An offroad will work but I will try to find an onroad head for it. For sure on small tracks it is fast enough. If you want a cheap engine you can take a look to the Picco Basic or the Novarossi Basic N21-3T or the 5T

Agreed, there are some stupid fast 3 port 12's out there, and some stupid fast 3, 5 and 7 port 21's
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Old 08-19-2010, 08:41 PM   #15
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Quote:
Originally Posted by Romeo View Post
Have the same car and i new to this hobby too. Using a IDM .21 evo4 engine on the evo m3 idm 35 shore tire and P909 shell the engine has lasted 3 month of daily abuse of 3 fuel bottle a day

Have fun
I have never seen an EVO 4 .21.
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