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Old 12-02-2007, 08:17 PM   #166
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what makes you think it is the best junkie ?? have you tried 2 dozen or more pipe/header combos to come to your conclusion ?? how do you think the pipe feels specifically ? i wanna know how the mugen pipes feel
later , monty
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Old 12-02-2007, 08:34 PM   #167
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As for the flame outs in the Xtreme mag.
In Skinny's Losi eight race roller test he said the 21-5 flamed when they fueled it. Look at his settings for the motor, bottom end was to rich and top to lean. On amainhobbies.com forums there is a engine tuning guide by Ron Paris explaining why some people think they have a motor tuned correctly but it's not.

Our 21-5 came with a #7 plug, ran the #6 and #7 and like the #7, adding a shim helped the motor run better. (.004 inch)

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Old 12-03-2007, 02:18 AM   #168
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houston: its a good thing u mentioned the different taper on the os plugs, was about to use one for my plus 21 7bt.

guys: this engine is great, i just finished breaking it in using the heat cycle method. initially had a hard time even turning the motor using the starter box, so what i did was i got a heat gun and pre-heated the negine to about 240 F and after a couple of secs. she started easily. during break-in the engine never flamed out and that lasted til the 8 tank mark. after the break-in process, i ran it on the track yesterday, ran for 3 tanks, temp was about 230 F (yes still a bit on the rich side) as a caution in case the engine wasnt fully broken in after 8 tanks, i forgot that when i set the end points on my radio i had the carb at 70% open only, but when i went down the straight, other truggies were not leaving me behind by a lot and i was even clearing the two doubles in the track. wow, this engine is really great. by the way at the track yesterday, i got 11 minutes on one tank, it was a 30 second per lap track. by the way, no flame outs.
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Old 12-03-2007, 06:25 AM   #169
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Nik I tried this combo on my 21-5k at Stephen Bess's suggestion.

Odonnell 99 plug (these motors like a cold plug)
Nova 9901 pipe
Nova Long Header (best for truggy to give good bottom end, use a short header in buggy for more top and smoother pull off the bottom)

That combo works incredible in my Mugen 5T. Plenty of punch with the stock gearing and a OFNA 7075 aluminum clutch and 1.1 springs. If it has enough punch in my heavy Mugen, it should MOVE that lightweight 8T.
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Old 12-03-2007, 04:10 PM   #170
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who said 8t?? Think 8B, man!

22Racer, thanks for that article! everybody that races nitro really needs to read that. It just makes so much sense.. thanks!

turns out I had the low end way to rich and compensated with a too high idle setting, and a leaned out top end. Coupled with a too hot plug

thanks everybody,
nik
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Old 12-03-2007, 06:25 PM   #171
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Quote:
Originally Posted by rdeppen View Post
Nik I tried this combo on my 21-5k at Stephen Bess's suggestion.

Odonnell 99 plug (these motors like a cold plug)
Nova 9901 pipe
Nova Long Header (best for truggy to give good bottom end, use a short header in buggy for more top and smoother pull off the bottom)

That combo works incredible in my Mugen 5T. Plenty of punch with the stock gearing and a OFNA 7075 aluminum clutch and 1.1 springs. If it has enough punch in my heavy Mugen, it should MOVE that lightweight 8T.
have you tried an odo 77 plug ? an mc8 ? novarosi 6 ? the short square header ? the medium round header ? the long header is extremely long and i havent had the best feel from engines with this combo opinions you can find by the millions anywhere and everywhere , which ones you choose to follow are completely up to you remember , fuel makes power , not air !
happy motoring
monty
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Old 12-04-2007, 04:55 AM   #172
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Quote:
Originally Posted by houston View Post
have you tried an odo 77 plug ? an mc8 ? novarosi 6 ? the short square header ? the medium round header ? the long header is extremely long and i havent had the best feel from engines with this combo opinions you can find by the millions anywhere and everywhere , which ones you choose to follow are completely up to you remember , fuel makes power , not air !
happy motoring
monty

Well lets see???

I did try the 77, Nova 6's 4 different headers, and 3 other pipes till I came to the conclusion Bess was right with that particular combo for a truggy. And your right opinions are like assholes.
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Old 12-04-2007, 11:01 AM   #173
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hi!i want to know if i can use with out problem a sleeve-piston set with numper F08035b from a jp eagle 21-5 engine in a plus 21-5.?the crankcase inside is the same?
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Old 12-04-2007, 11:05 PM   #174
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i dont remember saying anything about assholes but ................. and if it is a novarossi based jp engine you can use #08035 p/s set
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Old 12-05-2007, 08:29 AM   #175
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My english is not so good..what do you mean?the jps are assholes?why?
now,for the set i think that the jp-8036b will be fit exactly.it is a little different.
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Old 12-05-2007, 09:07 AM   #176
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LOL...

That gave me a good chuckle - be careful with the language, gang...

Gregory,

they are referring to an expression in English that goes something like "Opinions are like <Body Parts>, everyone has one!"

It wasn't a negative comment regarding JPs...

Hope that clarifies it for you...
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Old 12-05-2007, 01:38 PM   #177
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ok!i understant it...!
one more question!which is the best tool to remove the rear bearing in the 21/5?
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Old 12-05-2007, 02:30 PM   #178
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Unless you have a 14.5 inner diameter puller, you'll have to strip the case completely and heat the case and tap out the bearing on a wood block. I am unsure about the temp, but I assume 350-400F in an oven from what some have said here in the other forums.
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Old 12-05-2007, 11:26 PM   #179
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Unless you have a 14.5 inner diameter puller, you'll have to strip the case completely and heat the case and tap out the bearing on a wood block. I am unsure about the temp, but I assume 350-400F in an oven from what some have said here in the other forums.
Actually try heating the case to 250F measured with a heat gun. I just tapped out the bearing on a Sirio Kanio EVO III tonight by heating the case. I put the case in a toaster oven set to 400F. After 15 minutes, I tapped the case on a wood block and the bearing came out. Temp on case after bearing came out was at 220F. If this doesn't work for you, you have to heat the case higher.
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Old 12-06-2007, 02:17 AM   #180
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A heatgun works well too.
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