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Old 08-02-2009, 09:21 PM   #46
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How is the speed modded and the ninja stock...
Please explain you theory behind this comment..
The OS SPEED is essentially a V-Spec that has a slightly reworked crankcase, a silicone filled, tungsten weighted & hardened crankshaft, and a ceramic rear bearing. To the best of my knowledge, the JX-21 has none of those things, so to me, the latter counts as a "stock" engine.
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Old 08-02-2009, 09:22 PM   #47
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How is the speed modded and the ninja stock...
Please explain you theory behind this comment..
i second this...??????
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Old 08-02-2009, 09:46 PM   #48
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they are both stock since they are bought that way from the factory


or


If the speed is modded then so is just about every other turbo race engine.


but the fact is. if you want to argue this i guess the implied reference point would be the "stock" vspec in which case the ninja and speed both have filled and coated cranks whick would automaticly seperate them both from the "stock" vspec. BUT the ninja has 2 extra ports. The speed has a weight and ceramic bearing like countless other engines bought as "stock" so either all engines are either stock or moddified when they leave the store. But this just can't be.

A modded engine would be one that is "moddified" from it's original form.


it's late.
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Old 08-02-2009, 09:59 PM   #49
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Originally Posted by captain america View Post
The OS SPEED is essentially a V-Spec that has a slightly reworked crankcase, a silicone filled, tungsten weighted & hardened crankshaft, and a ceramic rear bearing. To the best of my knowledge, the JX-21 has none of those things, so to me, the latter counts as a "stock" engine.
dude they have the same crank the speed just has the weights in it...the speed is a 3port-ninja is a 5..same cuts in the block its just the ninja has the .28 block...only thing different that you may be geting confused with "modded" is the ceramic rear bearing and weights in the crank...
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Old 08-02-2009, 10:10 PM   #50
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ninja parts
http://www.amainhobbies.com/product_...ja-JX21-Conrod
http://www.amainhobbies.com/product_...-Piston-Sleeve
http://www.amainhobbies.com/product_...aft-DLC-Coated (i have the black crank like the speed just no weights...)

speed
http://www.amainhobbies.com/product_...g-Rod-Speed-21
http://www.amainhobbies.com/product_...iston-Speed-21
http://www.amainhobbies.com/product_...shaft-Speed-21

any one got better pics?
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Old 08-02-2009, 10:16 PM   #51
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Originally Posted by reggie l. View Post
dude they have the same crank the speed just has the weights in it...the speed is a 3port-ninja is a 5..same cuts in the block its just the ninja has the .28 block...only thing different that you may be geting confused with "modded" is the ceramic rear bearing and weights in the crank...
Hi reggie. I think my choice of terminology was inadequate, and I was certain that there were more differences between the two, but I went and called-up the Mugen website and there you go. Frankly, in light of this new info, and considering the striking price gap (on A-Main anyway) between the two, the SPEED seems like a bit of a ripoff. I still think that a modded (and by "modded" I mean sent to an independant contractor for machining) Ninja is the better choice, but that's just me.
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Old 08-02-2009, 10:22 PM   #52
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lol ok kool now...
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Old 08-02-2009, 11:36 PM   #53
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Default The great debate ! LOL

I knew that would stir the pot! i have the blueprints of both engines stock and eb modded embedded in my brain. There is many differences between the two engines that most ppl don't realize because it can't be seen with the eye.. Crank weights (physical weight before slugging), crank bores, timing, case volume, ect ect.. Like dreaux said both engines are stock being that they are mass produced from the factory. i consider a "mod" to be something that was altered from it's original state.
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Old 08-03-2009, 01:24 AM   #54
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yes pistons are the same,,,,sleeves and rods are different...


Ninja's P/L looks the same in design except OS's had a rework exhaust port.

Is that correct ?
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Old 08-03-2009, 05:33 AM   #55
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Are the pistons the same part between the OS and Ninja?
OK, it appears a lot of mis-infomation is floating around. The Ninja piston is not the same as the OS VSpec or Speed. The Speed and VSpec pistons are basically the same. Now, can you use a Ninja piston in a Speed or VSpec or vice versa-versa, yes. But you have to use the correct pin clips as they are different. One is C-Clip and the Ninja use a tabbed C-clip. Pop a regular c-clip into a Ninja piston and you'll have some fun tying to remove it later on for a rod change with no tab or piston notch to get at the clip. Also, the VSpec ports on the sleeve are configured differently from the Speed/Ninja, while the Ninja and Speed are practically indentical on the port shape and opening with the exception of the side ports, with the Ninja having a dual side porting instead of single.
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Old 08-03-2009, 05:40 AM   #56
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I agree the ninja is the budget speed engine. I dnt personally know anyone who would choose the ninja over the speed if money was not an issue. Very well said.
I would... for a truggy. The extra snap on the bottom makes the Ninja a better truggy engine. For a buggy, the smoothness of the Speed is better.
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Old 08-03-2009, 08:16 AM   #57
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OK, it appears a lot of mis-infomation is floating around. The Ninja piston is not the same as the OS VSpec or Speed. The Speed and VSpec pistons are basically the same. Now, can you use a Ninja piston in a Speed or VSpec or vice versa-versa, yes. But you have to use the correct pin clips as they are different. One is C-Clip and the Ninja use a tabbed C-clip. Pop a regular c-clip into a Ninja piston and you'll have some fun tying to remove it later on for a rod change with no tab or piston notch to get at the clip. Also, the VSpec ports on the sleeve are configured differently from the Speed/Ninja, while the Ninja and Speed are practically indentical on the port shape and opening with the exception of the side ports, with the Ninja having a dual side porting instead of single.
Yes, i forgot about the c clip difference... But i wouldn't say there is a lot of misinformation floating around.. Not from me anyway!
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Old 08-03-2009, 01:48 PM   #58
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my mag speed has crazy snap.

with OS p3 plug it's really strong bottom end

with Odonnel 97t plug it's crazy stuipd strong bottom end.
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Old 08-09-2009, 07:57 AM   #59
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Can anyone tell me the diffetence between the older and the newer ninja engine.Thanks...
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Old 08-09-2009, 08:12 AM   #60
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i have the losi re11 for my vspec and works awsome. Was thinking it would work good in my ninja as well. Should i get the re10?? just to see how it works?
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