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Old 10-26-2009, 11:59 AM   #1291
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Is this a Nova motor? If you are running Nova plugs, they aren't as good as they used to be. Try GRP or Sirio plugs. Otherwise, add a head shim. If this motor is old it may need a rod.
Ninja MR21-R01 stock plug. The Engine still locks on me when I try to start the car lots of compresion still, and the car runs hard but after 3 tanks and there goes the plug, when I look at the plug it still looks NEW but will not burn red.
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Old 10-26-2009, 12:09 PM   #1292
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I still check the bearing for smoothness.

Secondly, I would go for 20% nitro instead of 30% ..... if you tune your engine correctly, 20% nitro is as fast as 30%, with less headache of blowing up glow plugs, and get more runtime.


About quality of ninja glow plugs ..... I don't know anything about ninja.
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Old 10-26-2009, 12:12 PM   #1293
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Ninja MR21-R01 stock plug. The Engine still locks on me when I try to start the car lots of compresion still, and the car runs hard but after 3 tanks and there goes the plug, when I look at the plug it still looks NEW but will not burn red.
Add a shim then and you should be fine.
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Old 10-26-2009, 12:35 PM   #1294
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Mugen box all the way. I don't know why the other guy mentioned spare belts. I've been using mine since 1999 and never replaced a belt.
Yo wingracer, what batteries you recommend me using in my mugen box, right now i have two 1500 stick packs, and i really dont care for the lipo's i heard to many horror stories about those things,,,
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Old 10-26-2009, 12:46 PM   #1295
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Add a shim then and you should be fine.
Ok I will do that, But what plug should I use? Better yet What brand
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Old 10-26-2009, 12:48 PM   #1296
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Originally Posted by asw7576 View Post
I still check the bearing for smoothness.

Secondly, I would go for 20% nitro instead of 30% ..... if you tune your engine correctly, 20% nitro is as fast as 30%, with less headache of blowing up glow plugs, and get more runtime.


About quality of ninja glow plugs ..... I don't know anything about ninja.
I opened the Engine and the bearing is smooth.
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Old 10-26-2009, 01:57 PM   #1297
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Originally Posted by wingracer View Post
Is this a Nova motor? If you are running Nova plugs, they aren't as good as they used to be. Try GRP or Sirio plugs. Otherwise, add a head shim. If this motor is old it may need a rod.
What # plug should I go with I found GRP plugs at the hobbyshop. I found #4 #5 and they do not say if there hot or cold on them.
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Old 10-26-2009, 03:24 PM   #1298
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What # plug should I go with I found GRP plugs at the hobbyshop. I found #4 #5 and they do not say if there hot or cold on them.
You want GRP 7's but good luck finding them. You could try Sirio 7's. They work great in Novas but I don't know how they fit in GRP/Ninjas.
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Old 10-26-2009, 03:26 PM   #1299
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Yo wingracer, what batteries you recommend me using in my mugen box, right now i have two 1500 stick packs, and i really dont care for the lipo's i heard to many horror stories about those things,,,
1500's work fine. I think I have 2400s in mine now. It was one of those Orion Emaxx 2 pack deals.
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Old 10-26-2009, 05:11 PM   #1300
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You want GRP 7's but good luck finding them. You could try Sirio 7's. They work great in Novas but I don't know how they fit in GRP/Ninjas.
Ok I ordered them from my local Hobbyshop they said they can get there hands on them for me.
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Old 10-26-2009, 09:56 PM   #1301
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Originally Posted by wingracer View Post
Is this a Nova motor? If you are running Nova plugs, they aren't as good as they used to be.
it is true though, some current batch produced nova's plugs got problem, either open pack failure, and some will flame out the engine after running some laps, which then make you believe you have a rusty bearing or loosened rod.
i use o'donnel's 99
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Old 10-27-2009, 05:27 AM   #1302
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it is true though, some current batch produced nova's plugs got problem, either open pack failure, and some will flame out the engine after running some laps, which then make you believe you have a rusty bearing or loosened rod.
i use o'donnel's 99
On what Engine do you use the o'donnel's plugs I have the Mugen NINJA MR21-R01 I was told that my car still needs to be tuned. That is way I blow plugs.
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Old 10-27-2009, 10:10 AM   #1303
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Default Some Sweet New MRX4X Parts...

Just thought I'd post some pics of some nice MRX4X parts I received the
other day from YBSLOW. http://www.ybslowinc.com/

Magnesium / Lightened Front One-Way
One Way Bearing Removal & Install Tool
Long Rear H-Arms
Rear Aluminum Slide
Rear Body Post
Rear Body Mount Collars

Pretty Sweet!
Attached Thumbnails
MRX-4X-1-wa-bearing-removal-replacement-tool.jpg   MRX-4X-body-mount-slide.jpg   MRX-4X-long-rear-h-arm-body-post-collar-slide.jpg   MRX-4X-magnesium-front-one-way.jpg  
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Last edited by T-BODZ Terry B.; 10-27-2009 at 10:13 AM. Reason: Typo
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Old 10-27-2009, 10:21 AM   #1304
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Default MRX4X

Quote:
Originally Posted by T-BODZ Terry B. View Post
Just thought I'd post some pics of some nice MRX4X parts I received the
other day from YBSLOW. http://www.ybslowinc.com/

Magnesium / Lightened Front One-Way
One Way Bearing Removal & Install Tool
Long Rear H-Arms
Rear Aluminum Slide
Rear Body Post
Rear Body Mount Collars

Pretty Sweet!
How much did the long H arms raise the back of the body.
I have two MRX4X cars, and on one of them I used the Evolva M3 arms. It did help with the rear bite, but the aluminum arms really look good, and I may want to add those to the second car.
thanks
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Old 10-27-2009, 10:29 AM   #1305
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Be careful with running GRP engines they are dogs to run in, streched my conrod after a couple of litres and was popping rods.
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